An intraocular lens (IOL) is a medical device implanted in the eye to replace the natural lens after cataract surgery or to correct vision problems. Made from clear plastic or silicone, IOLs help focus light onto the retina, improving vision clarity. They come in various types, including monofocal, multifocal, and toric lenses, each designed for specific vision needs. The procedure to implant an IOL is typically quick and performed under local anesthesia. After the surgery, most patients experience significant improvements in their vision, allowing them to resume daily activities with greater ease. Regular follow-up with an ophthalmologist is essential for monitoring recovery.