So I wear multifocal glasses with 4 lenses in them and I understand how they work. But I can’t understand contacts. How do you look through the different lenses if the contacts move with your eyes?
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Bifocal or multifocal contact lenses are designed to correct presbyopia, a condition that affects your ability to focus on near objects as you age. They have different zones or rings of power that allow you to see clearly at different distances.
There are two main types of bifocal or multifocal contact lenses: **segmented** and **concentric**.
Segmented bifocal lenses have a defined line between the top and bottom sections of the lens, like bifocal glasses. The top section is for distance vision and the bottom section is for near vision. These lenses are usually rigid gas-permeable (GP) lenses that do not move with your eyes. Instead, they stay in place when you blink or look up and down.
Concentric bifocal or multifocal lenses have either the near or distance power in the center of the lens and the opposite power in the outer area of the lens, like a bullseye target. These lenses can be soft or hard, and they move with your eyes when you blink or look around. Your eyes will automatically adjust to the different powers depending on what you are looking at.
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