A coating on the lens helps prevent minor scratches that can occur from everyday wear and that reduce the clarity of the lens.
Improves vision by reducing the lens glare and allowing light to pass through better. Makes glasses more attractive by reducing the reflection others see or that appears in pictures.
Increases durability. Safer, as they don’t shatter. Slimmer and lighter weight than plastic or glass, giving greater comfort and appeal.
Lenses automatically darken when exposed to light (i.e. sunlight) and return to near-clear when indoors.
Traditionally bifocal lenses have had a horizontal line separating near and far prescription zones. No-line multifocals have prescription zones for close up, distance, and mid-range, with no visible lines separating the zones.
Blocks out ultraviolet (UV) light in the same way sunscreen protects your skin. This helps prevent UV damage to the retina.