Anti-reflection (AR) coatings cut glare and reflections; UV coatings block ultraviolet light; blue-light filters may improve screen comfort for some users; and specialised driving coatings reduce night-time headlight glare.
Most premium lenses bundle several coatings into one durable stack that also resists scratches, water and smudging.
Frequently Asked Questions:
Q. Is anti-reflection worth it?
A. For most wearers yes, especially for night driving and screen work.
Q. Do blue-light coatings prevent eye damage?
A. Evidence is mixed; some users report comfort benefits, but they are not proven to prevent disease.
Q. Can coatings be added later?
A. No; coatings are applied during manufacture and cannot be added to finished lenses reliably.