How are different index numbers differ? - Buy Cheap Glasses Online, Prescription Glasses Frames Expert

Nickolas Eyeglasses · #1 (**permalink**) 10-13-2010, 10:15 PM

I learned there are different index numbers for our glasses. Like 1.56 index, 1.50 index, 1.67 and 1.74 index. How does it affect the lenses? What is it exactly and why do I need to select an index number? Is there a standard index? How does it differ from all the others?

Jadyn Eyeglasses · #2 (**permalink**) 11-18-2010, 05:49 AM

Index number tells how thick or thin the lenses are. The higher the index number, the thinner the lenses are.

Jayvon Eyeglasses · #3 (**permalink**) 01-28-2011, 04:31 PM

Thinner and lighter high-index lens materials have impacted eyeglasses in a very significant way. Thin eyeglasses are attractive; thick ones aren't. Light eyeglasses are comfortable; heavy ones aren't. So it's no surprise that most of us want the thinnest, lightest eyeglasses possible.

Madelyn Eyeglasses · #4 (**permalink**) 11-05-2011, 05:19 AM

High index lenses are mostly recommended for high prescription lenses, they are more light weight and thinner lenses.

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