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Multifocal lenses are a type of intraocular lens (IOL) used in cataract surgery and refractive lens exchange procedures. Unlike traditional monofocal IOLs which provide clear vision at only one distance, multifocal lenses are designed to correct vision at multiple distances simultaneously. This allows patients to see clearly at near, intermediate, and far ranges, potentially reducing or eliminating the need for glasses or contact lenses for everyday activities.

The technology behind multifocal IOLs typically involves a combination of refractive and diffractive optical principles. These lenses have distinct zones or rings that bend light differently, directing it to focus on the retina for various distances. This sophisticated design can sometimes lead to visual side effects such as glare, halos, or starbursts, particularly in low-light conditions. However, for many individuals, these side effects are minimal and diminish over time as their brain adapts to the new visual input.

The suitability of multifocal lenses depends on individual needs and lifestyle. Candidates are carefully assessed by eye care professionals to determine if this option is the best choice for their vision correction goals. The implantation of multifocal lenses is a surgical procedure, and like any surgery, it carries inherent risks and benefits that are discussed thoroughly with the patient prior to the operation.