Eye problems: Common conditions and how to prevent vision loss - Medical News Today
The eyes work by allowing light to pass through the pupil to reach the retina, a thin layer of tissue at the back of the eyeball. The iris is a colored ring of tissue around the pupil that controls how much light enters the eye. The lens is the clear part of the inner eye that assists the cornea in focusing incoming light onto the retina. The retina contains light-sensitive receptor cells that convert light into electrical signals. These signals travel to the brain through the optic nerve, a thick bundle of nerve fibers behind the eye. The brain processes these electrical signals and converts them into visual images. Eye disorders and diseases can affect any part of this process to cause vision problems. Some diseases can lead to blindness if left untreated. Eye disorders and diseases cause a range of symptoms that may affect vision. Some common eye symptoms can include : blurred or cloudy vision double vision seeing glare or a ring around lights seeing floating spots sensitivity to l...