Cataracts are a normal aging process for the natural lens inside the eye. As we age, the lens inside the eye becomes cloudy, which can cause many symptoms including blurred vision, glare and halos, difficulty with night-time driving, and fading or yellowing of colors.
Eventually eyeglasses will no longer effectively increase vision function, and surgery is needed to restore vision. Cataract surgery involves removing the cataract and inserting a replacement lens. Traditional cataract surgery lenses are called monofocal lenses, which provide good distance vision but require eyeglasses for near and sometimes intermediate vision.
However, as a treatment advancement, multifocal lens implants are able to provide good distance and near vision and decrease the dependency on glasses.