Question

2. Depending on the orientation and magnitude of these
effects the
power progression introduces slight deformations of horizontal and vertical
lines thus altering the wearer's visual comfort.
​

Answer 1

Explanation:

Progressive lenses are line-free multifocals that have a seamless progression of added magnifying power for intermediate and near vision. The power of progressive lenses changes gradually from point to point on the lens surface, providing the correct lens power for seeing objects clearly at virtually any distance.