The short answer: Lens coatings are thin layers added to a lens to change how it performs. The ones worth paying for are anti-reflective, which cuts glare, and scratch-resistant, which protects the surface. UV protection should be built in already. Hydrophobic coatings shed water and smudges. Blue light and mirror coatings are optional, chosen for preference, not necessity.
What a coating is
A coating is a microscopically thin layer bonded to the lens that adds a property the bare lens lacks: less reflection, more scratch resistance, water repellency, or a touch of light control. Most quality lenses stack several. Knowing what each does helps you pay for the ones you will feel and skip the ones you will not.
The coatings, and which are worth it
| Coating | What it does | Worth it? |
|---|---|---|
| Anti-reflective (AR) | Cuts glare from lights and screens, sharpens night vision | Yes, for most people |
| Scratch-resistant | Hardens the surface against everyday wear | Yes, often standard |
| UV protection | Blocks UV rays; should be built into the lens | Essential, usually included |
| Hydrophobic / oleophobic | Sheds water, oil, and fingerprints | Nice to have |
| Blue light filter | Tints out part of the blue spectrum | Optional, preference |
| Mirror coating | Reflects extra light on sunglasses | Style and bright-light use |
The two that matter most
Anti-reflective is the coating you will notice every day: fewer headlight halos at night, less screen glare, and eyes visible in photos. It is worth it for almost anyone; see anti-reflective coating. Scratch resistance protects your investment, and a good AR coating usually includes a scratch layer. UV protection is non-negotiable, but on most modern lenses it is already built in rather than added on.
The optional ones
Hydrophobic coatings make lenses easier to clean and quicker to shed rain, a genuine convenience. Blue light filtering is a preference, not a need, since there is no evidence it protects your eyes; see do blue light glasses work. Mirror coatings belong on sunglasses for very bright conditions; see mirrored vs gradient. Buy these for what you want, not because a lens feels incomplete without them.
From our test bench. We test coated and uncoated versions of the same lens. Anti-reflective was the obvious win, cutting reflections in the dark and on screens. A hydrophobic top layer wiped clean in one pass where a plain lens smeared. A blue filter changed the tint but not the fatigue. If you add one coating, make it AR. If two, add scratch resistance.
FAQ
Which glasses coatings are worth it?
Anti-reflective and scratch-resistant are worth it for most people. AR cuts glare and scratch resistance protects the lens. UV protection is essential but usually built in. Hydrophobic, blue light, and mirror coatings are optional.
Do all lenses come with UV protection?
Most modern lenses include UV protection in the material, but not all, so confirm it. It is essential, and for sunglasses look for UV400.
Is a blue light coating necessary?
No. There is no evidence blue light coatings protect your eyes or reduce strain. They are a preference. The anti-reflective coating is what makes screen work more comfortable.
Part of Sunglasses Lenses Guide · Related: anti-reflective coating · Browse eyeglasses · Last updated: August 5, 2026
