The Complete Guide to Prescription Lenses
Vision type, lens material and thickness, coatings, and special lenses — how to choose the right lens for your prescription and your life.
What Your Prescription Controls
Your prescription decides the correction; you decide almost everything else about the lens, and those choices shape comfort, thickness, and clarity every day. There are three big decisions: vision type, material and thickness, and coatings. Get those right and the lens disappears into good vision.
Single vision, bifocal, and progressive cover almost everyone.
Higher index means a thinner lens for the same prescription.
Anti-reflective is the one upgrade almost everyone feels daily.
Vision Type: Single Vision or Progressive
Start here, because it depends on what you need corrected.
| Type | Corrects | Best for |
|---|---|---|
| Single vision | One distance | Nearsighted, farsighted, or reading-only |
| Bifocal | Two zones, visible line | Distance and reading, widest reading zone |
| Progressive | Near, middle, far, no line | Screens and a seamless look |
Progressives add the arm's-length middle that bifocals miss and take a short adjustment; full comparison in progressive vs bifocal lenses.
Material and Thickness
A higher index of refraction bends light more, so a strong prescription can be ground thinner and lighter. Match the index to your prescription strength.
| Index | Best for |
|---|---|
| 1.50 (standard) | Low prescriptions |
| 1.57–1.59 | Mild to moderate; polycarbonate for impact |
| 1.60–1.67 | Moderate to strong |
| 1.74 | Strong prescriptions, the thinnest common lens |
For impact resistance, kids, sport, or rimless frames, choose polycarbonate or Trivex; see Trivex vs polycarbonate. For strong prescriptions, see high-index lenses.
Lens Coatings
Coatings change how the lens performs. Two are worth it for most people; the rest are preference.
| Coating | What it does | Worth it? |
|---|---|---|
| Anti-reflective | Cuts glare and night halos | Yes, for most |
| Scratch-resistant | Hardens the surface | Yes, often standard |
| UV protection | Blocks UV; usually built in | Essential |
| Hydrophobic | Sheds water and smudges | Nice to have |
| Blue light | Tints out part of blue | Optional, preference |
The full rundown is in lens coatings explained, and why AR is the one to always add in anti-reflective coating.
Special Lenses
Photochromic
Darken outdoors and clear indoors, so one pair does both. They barely darken behind a car windshield. See photochromic lenses explained.
Prism
A wedge that corrects eye misalignment and double vision. It is a medical correction from an eye exam. See prism glasses.
Blue light filter
Optional, not a proven need; there is no evidence it protects eyes or reduces strain. See do blue light glasses work.
Match Lenses to Your Life
You drive at night
Add anti-reflective coating to cut headlight halos. Skip tinted night-driving lenses, which do not help. See night driving glasses.
You work on screens
Anti-reflective coating and the right focal setup beat a blue filter. See glasses for computer work.
You play sport
Choose impact-resistant polycarbonate or Trivex, and UV400 for sun. See best sunglasses for sports.
You have a strong prescription
High-index thins the lens; pair it with anti-reflective, which strong lenses need most.
We cut the same prescription across index and coatings and compare on an eye chart and a bench scale. The upgrade people feel every day is anti-reflective; the one that matters for strong prescriptions is high-index. Read our method on the About page.
Frequently Asked Questions
Which lens coating is most worth it?
Anti-reflective. It cuts glare from headlights and screens and sharpens night vision, so you feel it every day. A good AR coating usually includes scratch resistance too.
Do I need high-index lenses?
Only if your prescription is strong. High-index thins and lightens a strong lens, but for mild prescriptions standard lenses stay thin enough and cost less.
Are progressives worth it over bifocals?
For screen work and a line-free look, yes. Progressives add the middle distance bifocals miss. Bifocals give a wider reading zone at a lower price.
Is a blue light coating necessary?
No. There is no evidence it protects your eyes or reduces strain. The anti-reflective coating is what makes screen work more comfortable.
Can prescription lenses be sunglasses too?
Yes. Any prescription can be made into sunglasses, with polarization and tint options. See the prescription sunglasses guide.
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Part of the Glasses Atlas Journal · Related: how to read your prescription · high-index lenses · Last updated: August 5, 2026
