Question

Sample markings on progressive lenses

Answer 1

When looking through eyeglasses, thin lenses act in a specific way and progressive lenses are designed differently.

Step-by-step explanation:

When looking through your eyeglasses, the way they act depends on the type of lenses you have. If your eyeglasses have thin lenses, then they will make objects appear smaller or closer when you look through them in different directions. On the other hand, if your eyeglasses have progressive lenses, they are designed to correct vision at different distances, from near to far, without the visible lines found in bifocal or trifocal lenses.