This provides ultraviolet (UV) protection for your eyes by blocking damage to your eyes by the sun’s harmful rays. Overexposure to UV rays is believed to cause cataracts, retinal damage and other eye problems.
Lenses with an anti-reflective coating or multi coating helps to minimize glare, reflections and halos around lights. This is useful for safety purposes when you are driving at night.
Photochromic lenses change from a light colour to a dark color depending on the amount of UV light they are exposed to.
Super-hydrophobic coating literally stops water droplets from sticking to the lenses. This option is perfect for those who wear their glasses at all times, as rain can often be a nuisance that obscures your vision.
Blue-light-blocking coatings are said to reduce exposure to smartphone, TV & computer screens’ LED light. (Some studies suggest that overexposure can damage the retina and increase the risk of age-related macular degeneration and cataracts.)