Vision after 40: Advantages of Progressive Lenses

Eyeglasses31 May, 2024Health

Bifocal lenses for glasses only have two powers: one for seeing across the room and the other for seeing up close. Intermediate objects, such as a computer screen or items on a grocery store shelf, often remain blurry with bifocals. To try to see objects clearly in this ?intermediate? range, bifocal wearers must move their heads up and down, alternately looking at the top and then the bottom of their bifocal lenses, to determine which part of the lens works best.