Which is better for everyday use, single vision or progressive lenses?

Neither is universally better; single vision suits people with one prescription need, while progressive lenses benefit those with presbyopia who need clear vision at multiple distances.

Are progressive lenses more expensive than single vision lenses?

Yes, progressive lenses cost significantly more than single vision lenses because their complex design requires advanced manufacturing and precise fitting to create seamless vision zones.

Are progressive lenses safe for driving at night?

Yes, progressive lenses are safe for night driving, but new wearers may need an adaptation period of a few days to adjust to peripheral distortion and head movements.

Can progressive lenses be used in computer glasses?

Yes, progressive lenses work well in computer glasses because they provide a clear intermediate zone for screens plus near vision for reading documents on your desk.

What is the most common beginner mistake when switching to progressive lenses?

The most common beginner mistake is moving your eyes instead of your head to look through the wrong lens zone, which causes blurry vision and unnecessary discomfort.

Can single vision and progressive lenses be used interchangeably?

No, single vision and progressive lenses are not interchangeable because they serve different vision needs, and using the wrong type will leave you with blurred vision at certain distances.

Are progressive lenses suitable for outdoor sports and activities?

Yes, progressive lenses suit most outdoor activities, but single vision lenses are often better for sports requiring constant distance vision, like cycling or ball sports, due to wider peripheral clarity.

Can I switch from single vision to progressive lenses easily?

Yes, you can switch from single vision to progressive lenses, but expect a one to two week adaptation period where your brain learns to use the different vision zones.

Which lens type provides clearer peripheral vision, single vision or progressive?

Single vision lenses provide clearer peripheral vision because they have one uniform power, whereas progressive lenses have slight distortion in the lens edges due to the power transition.

Difference Between

Difference Between Single Vision and Progressive

Written byNex Virox Team

Editorial Team

Reviewed byVarshal Nirbhavane

Senior SEO & Organic Growth Professional · 5+ years

Published: September 5, 202619 min read

Quick answer

The main difference between Single Vision and Progressive is that Single Vision corrects one focal distance, while Progressive corrects multiple distances without a visible line. Single Vision is a lens with one uniform prescription for all viewing distances, while Progressive is a multifocal lens offering seamless near, intermediate, and distance vision.

Key takeaways

Core distinction: Single vision has one focal length; progressive lenses offer multiple vision zones.
How they work: Progressive lenses provide seamless distance, intermediate, and near vision without visible lines.
Adaptation effort: Single vision requires zero adjustment, while progressives need days or weeks of adaptation.
Best-fit use: Single vision suits one-distance needs; progressives fit presbyopes needing multifocal correction.
Common mistake: Choosing single vision for presbyopia causes blurred intermediate and near vision at work.

Table of Contents18 sections

Difference Between Single Vision and Progressive: Comparison Table

Aspect	Single Vision	Progressive
Definition	One uniform prescription power across the entire lens surface.	Multiple prescription powers blended into one lens without visible lines.
Purpose	Corrects one focal distance, typically distance, intermediate, or near vision.	Corrects distance, intermediate, and near vision in a single lens.
Core Mechanism	Single spherical or cylindrical curve provides constant refractive power everywhere.	Gradual power progression from top to bottom via changing lens curvature.
Lens Structure	Uniform thickness across the entire lens surface.	Thicker center and edges with a corridor of changing curvature.
Visible Lines	No lines or segments present on the lens surface.	No visible lines; seamless transition between viewing zones.
Zones	One single optical zone covering the whole lens.	Three zones: distance top, intermediate middle, near bottom.
Field of View	Full field of view with no peripheral distortion.	Narrower peripheral zones with slight distortion at lens edges.
Adaptation Period	Minimal to none; wearers adjust almost immediately.	Typically 1-2 weeks for most wearers to fully adapt.
Head Movement	Eyes move freely without requiring head repositioning.	Requires head movement to align gaze with correct zone.
Swim Effect	No swim or rocking sensation when moving.	Noticeable peripheral swim effect during initial adaptation.
Cost Range	Typically $50-$150 per pair from standard optical retailers.	Typically $200-$600 per pair depending on lens design.
Price Driver	Basic lens material and coating choices determine final price.	Design complexity, corridor length, and brand technology drive cost.
Manufacturing	Simple grinding or casting process with standard equipment.	Free-form digital surfacing required for precise power mapping.
Prescription Range	Handles very high powers up to +/-20 diopters effectively.	Limited to moderate powers, typically up to +/-6 diopters.
Astigmatism	Corrects all levels of astigmatism including high cylinder values.	Corrects mild to moderate astigmatism up to about 2 diopters.
Accuracy	Precise correction at the single prescribed focal distance.	Slight power error possible in intermediate corridor zones.
Visual Acuity	Sharpest possible vision at the designated working distance.	Good acuity across distances but slightly reduced at extremes.
Durability	Standard scratch resistance with standard hard coating applied.	Same durability but thinner edges may chip more easily.
Weight	Lighter lens profile, especially in high-index materials.	Heavier due to thicker center and additional surface area.
Frame Compatibility	Works with virtually any frame size or shape available.	Requires frames with sufficient vertical height, typically 30mm minimum.
Safety	No adaptation risk; safe for driving and sports immediately.	Initial adaptation period makes stair descent and driving risky.
Occupational Use	Ideal for single-task work like computer or reading only.	Suits mixed activities requiring frequent distance changes.
Availability	Available at every optical retailer and online vendor globally.	Widely available but requires fitting expertise from opticians.
Customization	Limited to material, coating, and tint personalization options.	Offers corridor length, inset, and design personalization choices.
Typical Users	Children, young adults, or those needing single-distance correction.	Adults over 40 with presbyopia needing multiple distance correction.
Presbyopia	Cannot correct presbyopia; requires separate reading glasses.	Specifically designed to manage presbyopia with one pair.
Intermediate Vision	No intermediate correction unless prescribed as computer glasses.	Dedicated intermediate zone for screens and dashboards.
Digital Screens	Requires separate computer glasses for comfortable screen use.	Intermediate zone supports comfortable monitor viewing.
Limitations	Only corrects one distance; needs multiple pairs for varied tasks.	Peripheral distortion and adaptation challenges for new users.
Best-Fit Scenario	Best for single-distance tasks like driving or dedicated reading.	Best for active lifestyles needing seamless distance-to-near vision.

What Is Single Vision?

Single vision is a lens type with one uniform focusing power across the entire surface. It corrects vision at a single distance, typically for seeing far away or up close. It exists to provide simple, reliable correction for one specific visual need.

Definition of Single Vision

Single vision is an ophthalmic lens whose spherical or cylindrical power remains constant across every point of the optical zone. This design corrects one focal distance only, such as distance, intermediate, or near. It contains no additional magnification zones for other viewing ranges.

Key Characteristics of Single Vision

Characteristic	What It Means in Practice
One focal power	Corrects vision at a single distance, either near, intermediate, or far, across the whole lens.
Uniform lens surface	No visible lines or segments appear on the lens, keeping the front surface completely smooth.
Wide field of view	Provides clear, undistorted vision across the entire lens area, including peripheral zones.
Simple adaptation	Most wearers adjust instantly because the lens mimics natural, unaided vision without special head movements.
Prescription simplicity	Contains one sphere or cylinder value only, making the prescription straightforward for an optician to fill.
Lightweight construction	Uses less material than multifocal lenses, making the finished eyewear noticeably lighter on the face.
Cost effectiveness	Typically priced lower than progressive or bifocal lenses due to simpler manufacturing and design processes.
Distance-specific clarity	Delivers sharp vision at the prescribed distance but leaves other distances uncorrected, often blurry.
No corridor zone	Lacks the intermediate channel found in progressives, so no gradual power transition exists.
Fixed optical centre	Has a single optical centre that must align with the pupil for optimal visual performance.

Common Examples of Single Vision

Distance glasses – prescribed for myopia or hyperopia, worn all day for clear far-away vision.
Reading glasses – sold over-the-counter or by prescription, used specifically for close-up tasks like reading books.
Computer glasses – optimised for intermediate distances, reducing eye strain at a monitor arm's length.
Driving sunglasses – polarised or tinted single vision lenses that sharpen road signs and hazards.
Safety goggles – impact-resistant single vision lenses used in workshops, labs, and industrial environments.
Sports eyewear – wrap-around single vision lenses for cycling, running, or ball sports requiring peripheral clarity.
Prescription swimming goggles – moulded single vision lenses that correct underwater vision without fogging.
Children's school glasses – durable single vision frames that correct classroom board distance and reading tasks.
Replacement lenses – standard single vision lenses fitted into existing designer frames after a prescription change.
Clip-on sunglasses – magnetic single vision tinted lenses that attach over everyday prescription eyewear.

Advantages and Limitations of Single Vision

Advantages	Limitations
Provides crisp, undistorted vision across the entire lens, including the peripheral edges.	Corrects only one distance, so users need separate pairs for near and far tasks.
Adaptation is near-instant for most wearers, with no balance or depth perception issues reported.	Requires constant switching between multiple glasses throughout the day for presbyopes.
Lenses are typically thinner and lighter than progressive equivalents at the same prescription strength.	Offers no intermediate correction, making arm's-length tasks like computer work difficult for some.
Manufacturing simplicity keeps retail prices lower, making single vision the budget-friendly choice.	Provides no seamless transition between distances, unlike progressive lenses that offer three zones.
Fewer optical aberrations occur because the lens has no power gradient or corridor to distort.	Wearers over 40 often outgrow single vision as presbyopia reduces near-focus flexibility.
Frames can be any shape or size since no minimum fitting height is required for the lens.	Offers no visual support for intermediate distances, which are common in modern digital work.
Prescriptions are simple, reducing the chance of lab errors during lens fabrication and edging.	Provides no progressive addition, so presbyopic wearers experience blur when shifting gaze between distances.
Ideal for children and first-time wearers due to the natural, uncomplicated visual experience.	Cannot serve as an all-in-one solution, forcing users to own multiple pairs for different activities.
High-index materials make strong single vision prescriptions cosmetically appealing and featherweight.	Offers no benefit for presbyopia, the age-related condition that progressive lenses specifically address.
Easy to verify and measure with standard lensometers, ensuring accurate dispensing at any optical store.	Lacks the graduated power of progressives, so wearers must reposition glasses or tilt their head to focus.

What Is Progressive?

Progressive lenses are multifocal eyeglass lenses that correct distance, intermediate, and near vision in one seamless lens. They provide a smooth transition between focal powers without visible lines. Progressive lenses exist to restore clear vision at all distances while maintaining a natural, line-free appearance.

Definition of Progressive

A progressive addition lens (PAL) is an ophthalmic lens with a continuously varying dioptric power gradient from the distance zone at the top to the near zone at the bottom. The intermediate corridor connects these zones without prismatic jump or visible segmentation. This design mimics natural accommodation for presbyopic wearers.

Key Characteristics of Progressive

Characteristic	What It Means in Practice
No visible lines	The lens surface is smooth, so nobody can tell you wear multifocals by looking at you.
Three viewing zones	Distance at top, intermediate in middle, and near at bottom for full-range clarity.
Intermediate corridor	A narrow channel connects zones, ideal for computer screens at arm's length.
Gradual power change	Diopter strength increases progressively downward, mimicking natural focusing behaviour.
Adaptation period	New wearers typically need a few days to weeks to adjust to peripheral distortion.
Peripheral distortion	Side vision has slight blur or swim effect, especially in lower-cost lens designs.
Customisable design	Labs can tailor corridor length and inset based on frame size and wearing habits.
Presbyopia correction	Designed specifically for age-related loss of near focusing ability after age 40.
Digital optimisation	Freeform manufacturing maps the lens point-by-point for sharper peripheral clarity.
Frame height requirement	Lenses need a minimum vertical frame depth, usually 30-35 mm, to fit all zones.

Common Examples of Progressive

Essilor Varilux X Series – a premium freeform design that widens the intermediate corridor for digital device users.
Zeiss Progressive Individual 2 – a fully customised lens measured to your exact frame fit and pupil position.
Hoya Sync III – a mid-priced digital progressive balancing sharp vision with a short adaptation curve.
Shamir Autograph III – a popular design that reduces peripheral swim using wavefront technology.
Rodenstock Impression Progressive – a high-end lens tailored to your eye movement patterns and head posture.
Johnson & Johnson Vision AccuFit – a digital progressive offering a wide near zone for comfortable reading.
Kodak Unique Progressive – a lens engineered with a short corridor for smaller fashion-forward frames.
Nikon SeeMax – a Japanese-engineered progressive known for smooth transitions and minimal adaptation time.
Optics by VSP One Progressive – a budget-friendly digital option available through VSP network eye doctors.
Costco Kirkland Signature Progressive – a value-priced digital lens with solid optics for everyday wear.

Advantages and Limitations of Progressive

Advantages	Limitations
Provides seamless vision at all distances without switching between multiple pairs of glasses.	Peripheral distortion causes a noticeable swim effect that some wearers never fully tolerate.
No visible bifocal line, so the lenses look identical to single vision for a younger appearance.	Requires a minimum frame height, which eliminates many stylish shallow-frame options entirely.
Eliminates the image jump that bifocal wearers experience when crossing the segment line.	Adaptation can take one to two weeks, with headaches and dizziness common in the first days.
Offers a true intermediate zone for computer work, which bifocals completely lack.	Premium freeform designs cost significantly more than standard bifocals or single vision lenses.
Customisable corridor length lets wearers match the lens to their specific daily visual tasks.	Reading zone is narrower than a bifocal segment, requiring more head movement to scan a page.
Progressive designs work well for active lifestyles, including driving and sports with quick focus shifts.	Downstairs navigation and curbs can feel hazardous during the initial adaptation period.
Modern digital manufacturing reduces peripheral blur compared to older conventional progressive designs.	Not suitable for people with certain vestibular disorders who cannot tolerate visual motion cues.
Single pair of glasses handles all distances, simplifying daily life for presbyopic wearers.	Cheaper entry-level progressives often have narrow zones and excessive distortion that frustrate wearers.
No age-related stigma attached, as progressive lenses are widely accepted as the modern presbyopia standard.	Frame fitting is critical; a poorly fitted frame ruins the optics and can make the lenses unusable.
Can be made in high-index materials to keep lenses thin and light for stronger prescriptions.	Occupational tasks requiring prolonged upward near viewing, like ceiling work, have no usable near zone.

Similarities Between Single Vision and Progressive

Shared Aspect	How Single Vision and Progressive Are Alike
Primary Purpose	Single vision and progressive lenses both correct refractive errors to improve a wearer's visual clarity.
Optical Category	Single vision and progressive lenses are both prescription eyewear products designed by optometrists.
Core Material	Single vision and progressive lenses are both typically manufactured from high-index plastic or polycarbonate.
Prescription Input	Single vision and progressive lenses both require a valid, current eyeglass prescription from an eye care professional.
Vision Correction	Single vision and progressive lenses both bend light to focus images precisely onto the retina.
Frame Compatibility	Single vision and progressive lenses both fit into standard optical frames chosen by the wearer.
UV Protection	Single vision and progressive lenses both block harmful ultraviolet rays to safeguard long-term eye health.
Scratch Resistance	Single vision and progressive lenses both accept durable anti-scratch coatings to extend their usable lifespan.
Anti-Reflective Coating	Single vision and progressive lenses both benefit from anti-reflective treatments that reduce distracting glare.
Blue Light Filter	Single vision and progressive lenses both can include blue-light filtering technology for digital screen users.
Target Users	Single vision and progressive lenses both serve adults who need dependable, everyday optical correction.
Daily Wear	Single vision and progressive lenses both support all-day wear from morning until night without removal.
Fitting Process	Single vision and progressive lenses both require precise pupillary distance measurement during the fitting session.
Dispensing Standard	Single vision and progressive lenses both follow ANSI Z80.1 optical tolerance standards for accuracy.
Manufacturing Method	Single vision and progressive lenses both use digital free-form surfacing technology for precision optics.
Cleaning Routine	Single vision and progressive lenses both need microfiber cloths and lens cleaner for proper maintenance.
Replacement Cycle	Single vision and progressive lenses both typically require replacement every one to three years.
Adaptation Period	Single vision and progressive lenses both require a short adjustment period when a wearer first uses them.
Driving Safety	Single vision and progressive lenses both provide adequate vision correction for safe driving activities.
Reading Support	Single vision and progressive lenses both assist wearers with near-distance reading tasks when prescribed.
Distance Vision	Single vision and progressive lenses both deliver clear distance vision for everyday outdoor activities.
Insurance Coverage	Single vision and progressive lenses both qualify for vision insurance benefits and flexible spending accounts.
Retail Availability	Single vision and progressive lenses both are sold through optical retailers, clinics, and online vendors.
Customization Options	Single vision and progressive lenses both offer tinting, photochromic, and polarization customization choices.
Quality Verification	Single vision and progressive lenses both undergo lensometry verification to confirm prescription accuracy.
Weight Profile	Single vision and progressive lenses both come in lightweight high-index versions for comfort.
Durability Factor	Single vision and progressive lenses both resist impact when made from polycarbonate or Trivex materials.
Professional Oversight	Single vision and progressive lenses both require an optician's final alignment and dispensing check.
Warranty Protection	Single vision and progressive lenses both typically include a one-year manufacturer scratch warranty.
Outcome Measure	Single vision and progressive lenses both succeed when they deliver comfortable, sharp, and stable vision.

Single Vision or Progressive: Which Should You Choose?

The deciding variable is your primary daily distance demand. Choose Single Vision if you need one clear focal length. Choose Progressive if you need sharp vision at near, intermediate, and far distances without switching glasses.

When to Use Single Vision

Choose Single Vision when you only need correction for one specific distance, such as reading, driving, or computer work. It is also the right choice for first-time wearers, children, or anyone on a tight budget.

When to Use Progressive

Choose Progressive when you need seamless vision at multiple distances throughout the day, such as moving from a book to a screen to a conversation. It is ideal for presbyopes over 40 who dislike carrying separate pairs.

Common Misconceptions About Single Vision and Progressive

Common Myth	The Reality
Single vision lenses only fix nearsightedness, not farsightedness.	Single vision lenses correct myopia, hyperopia, and astigmatism because each lens has one uniform prescription power across its entire surface.
Progressive lenses are the same as bifocals with a visible line.	Progressive lenses have no visible line because their power changes gradually from distance to near, unlike bifocals which have a hard segment boundary.
You can use single vision lenses for reading and driving simultaneously.	A single vision lens has one focal length, so it corrects either distance or near vision, never both at the same time.
Progressive lenses are only for people over 60 years old.	Progressives suit anyone with presbyopia, which typically begins around age 40, and younger adults can use them for computer work.
Single vision lenses are always thinner than progressive lenses.	Thickness depends on prescription strength and lens material, so a high-power single vision lens can be thicker than a low-power progressive lens.
Progressive lenses cause permanent eye damage or muscle weakness.	Progressives do not damage eyes; temporary adaptation dizziness occurs because your brain learns new head and eye movement patterns, not because of harm.
Single vision lenses cannot be used for computer work.	Single vision computer lenses exist with a mid-range power, but standard single vision lenses only correct one fixed distance, so they blur other ranges.
Progressive lenses work instantly without any adjustment period.	Most wearers need 1 to 2 weeks of adaptation because progressive lenses require you to move your head to find the correct power zone for each distance.
Single vision lenses are only available in glass, not plastic.	Single vision lenses come in glass, standard plastic, polycarbonate, and high-index materials, giving you multiple weight and durability options.
Progressive lenses are just expensive single vision lenses with a brand name.	Progressives contain multiple power zones and digital freeform technology, which requires more precise manufacturing and fitting than a single vision lens.
Single vision lenses correct presbyopia if you have a mild prescription.	No single vision lens can correct presbyopia because presbyopia requires different powers for near and far, which is exactly what progressive lenses provide.
Progressive lenses make your peripheral vision completely disappear.	Progressive lenses have peripheral blur at the edges, but your side vision remains functional; you just need to turn your head instead of shifting your eyes.
Single vision lenses are identical for every patient with the same prescription.	Single vision lenses vary by base curve, optical center placement, and pupil distance, so fitting must be personalized even though the power is uniform.
Progressive lenses are unsuitable for people who play sports.	Progressives work for many sports, but athletes often choose single vision or sport-specific lenses because fast head movements can make the progressive zones hard to use.
Single vision lenses have no optical center that needs precise alignment.	Single vision lenses require accurate optical center placement aligned with your pupil, otherwise you experience prismatic effects, blur, and eye strain.
Progressive lenses make stairs look distorted and dangerous permanently.	Stair distortion is a temporary adaptation effect caused by the corridor width; most wearers adjust within days and no longer notice the swaying floor.
Single vision lenses are the cheapest option, so they are low quality.	Single vision lenses are cheaper because they have one power, but quality depends on material, coatings, and optical accuracy, not on the number of zones.
Progressive lenses are only for people who already wore bifocals.	Many first-time presbyopes go directly from single vision to progressive lenses, skipping bifocals entirely, because progressives offer seamless distance and near vision.
Single vision lenses cannot be tinted or coated with anti-reflective treatment.	Single vision lenses accept all coatings including anti-reflective, scratch-resistant, UV protection, and tints, just like progressive lenses do.
Progressive lenses are too heavy for small frames.	Modern high-index progressive lenses fit small frames well, but you need a frame with enough vertical height to accommodate the progressive corridor properly.
Single vision lenses fix all vision problems including eye alignment issues.	Single vision lenses correct refractive errors only; strabismus or convergence issues require prism or vision therapy, not a standard single vision prescription.
Progressive lenses are impossible to get used to for most people.	Over 90 percent of progressive wearers adapt successfully within two weeks, and failures usually stem from poor fitting or incorrect frame selection.
Single vision lenses have no difference between reading and distance versions.	A reading single vision lens has a plus power for near work, while a distance single vision lens has a different power, so they are completely distinct products.
Progressive lenses are only useful for reading, not for distance vision.	Progressive lenses contain a full distance zone at the top, an intermediate zone in the middle, and a reading zone at the bottom, covering all distances.
Single vision lenses are the same as plano lenses with no power.	Single vision lenses have one prescription power, while plano lenses have zero power and are used for fashion or safety, so they are not equivalent.
Progressive lenses cost the same as single vision lenses at every retailer.	Progressive lenses cost 2 to 3 times more than single vision because of advanced manufacturing, design complexity, and the need for precise measurements.
Single vision lenses do not need pupil distance measurement for fitting.	Single vision lenses require accurate pupillary distance measurement to align the optical center with your pupil, otherwise you get blur and headaches.
Progressive lenses are not suitable for people with astigmatism.	Progressive lenses correct astigmatism in addition to presbyopia because the cylinder power is built into the progressive design, so astigmatism is not a barrier.
Single vision lenses force you to hold reading material at arm's length.	Single vision reading lenses let you hold material at a normal reading distance, but they blur distance vision, so you must remove them for far viewing.
Progressive lenses are obsolete because laser eye surgery replaces them.	Laser surgery does not stop presbyopia progression, so many post-surgery patients still need progressive lenses for near vision after age 45.

Conclusion

Difference Between Single Vision and Progressive comes down to focal points: one distance versus three zones. Choose single vision for one consistent task, like driving or reading. Choose progressive lenses for seamless vision at all distances without switching glasses.

FAQs on Difference Between Single Vision and Progressive

What is the main difference between single vision and progressive lenses?: Single vision lenses have one prescription power across the entire lens, while progressive lenses offer multiple powers for distance, intermediate, and near vision without visible lines.
Which is better for everyday use, single vision or progressive lenses?: Neither is universally better; single vision suits people with one prescription need, while progressive lenses benefit those with presbyopia who need clear vision at multiple distances.
Are progressive lenses more expensive than single vision lenses?: Yes, progressive lenses cost significantly more than single vision lenses because their complex design requires advanced manufacturing and precise fitting to create seamless vision zones.
Are progressive lenses safe for driving at night?: Yes, progressive lenses are safe for night driving, but new wearers may need an adaptation period of a few days to adjust to peripheral distortion and head movements.
Can progressive lenses be used in computer glasses?: Yes, progressive lenses work well in computer glasses because they provide a clear intermediate zone for screens plus near vision for reading documents on your desk.
What is the most common beginner mistake when switching to progressive lenses?: The most common beginner mistake is moving your eyes instead of your head to look through the wrong lens zone, which causes blurry vision and unnecessary discomfort.
Can single vision and progressive lenses be used interchangeably?: No, single vision and progressive lenses are not interchangeable because they serve different vision needs, and using the wrong type will leave you with blurred vision at certain distances.
Are progressive lenses suitable for outdoor sports and activities?: Yes, progressive lenses suit most outdoor activities, but single vision lenses are often better for sports requiring constant distance vision, like cycling or ball sports, due to wider peripheral clarity.
Can I switch from single vision to progressive lenses easily?: Yes, you can switch from single vision to progressive lenses, but expect a one to two week adaptation period where your brain learns to use the different vision zones.
Which lens type provides clearer peripheral vision, single vision or progressive?: Single vision lenses provide clearer peripheral vision because they have one uniform power, whereas progressive lenses have slight distortion in the lens edges due to the power transition.