Aspheric lenses have a slimmer profile for virtually all prescriptions, but the difference is especially dramatic in lenses that correct high amounts of farsightedness or plus numbers. These lenses become flatter thus lighter and thinner.
Polarized lenses contain a laminated filter that allows only vertically oriented light to pass through. This blocks the horizontally oriented light so that glare is almost eliminated. This improves comfort and vision. The most common colors of polarized lenses are gray and brown.
Recommended for people who spend most of their time outdoors, on the beach or mountains or who drive on highways.
Lenses that change colour and become dark on exposure to UV light (outdoors) are called photochromic lenses. They act like sunglasses when out doors and become clear lenses once exposure to UV is cut i.e. indoors. They are also referred to as day night lenses.
Progressive lenses have three prescriptions in one pair of glasses. That allows you to do close-up work (like reading a book), middle-distance work (like checking out a website on a computer), or distance viewing (like driving) without needing to change your glasses. They’re sometimes called multifocal lenses. These are mostly required after the age of 40 years.
Yes there are lenses that cut down the extra glare and improve contrast.
Thus they make night driving more comfortable.
Blue protect is a lens coating specially developed for people who spend a lot of their time indoors and are exposed to blue-violet light from LEDs as well as TV, computer or tablet screens. This coating cuts out the harmful blue radiations emitted from digital screens. Blue cut is different from blue protect, that it cuts all the blue radiations (good & bad).
It is not recommended for professions involving work with colours or any type of colour matching, eg designing, photography etc as colour tones are altered.
Anti reflection coating is a coating added to the surface of the spectacle lenses. It increases the lens transparency and reduces reflections from the lens surface. Recommended for everyone to enhance the lens quality.
High index is a lens material property, which makes the lens thinner and lighter. It is recommended for people who have high spectacle numbers to improve comfort and cosmesis.
Anti reflection coating is a coating added to the surface of the spectacle lenses. It increases the lens transparency and reduces reflections from the lens surface. Recommended for everyone to enhance the lens quality.