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What are some features of multifocal contact lenses?

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Quick Answer

Multifocal contact lenses are designed to help people who suffer from a condition called presbyopia. These lenses are useful for people who find that they have good distance vision while wearing standard contact lenses but struggle to focus when reading menus or books at a normal reading distance. Multifocal contact lenses are not new, but they have only recently become popular as contact lens technology has improved to make them more comfortable and reliable.

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Full Answer

There are two main types of multifocal contact lenses. Alternating vision lenses work like traditional varifocal glasses; when you are looking down, you see using the near-focus section of the lens, and when you are looking up, you see using the distance part of the lens. Simultaneous vision lenses are designed so that you are always looking through both the distance and near powers, and your brain learns to interpret the right signals at the right time depending on what you are trying to focus on.

Some designs of multifocal lenses have the center of the lens near-focused for the dominant eye and distance-focused for your non-dominant eye. Multifocal lenses made from silicone hydrogel allow more oxygen to penetrate them than conventional soft lenses, which means they are more comfortable and better suited for extended wear.

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