Retinal disorders, macular diseases


Retina is a fine sheet of nerve tissue lining the inside of the eye. Rays of light enter the eye and focused onto the retina. The retina produces a picture which is sent along the optic nerve for the brain to interpret. Retinal detechment often develops in eyes with retinas weakened by a hole or tear. This allows fluid to seep underneath, weakening the attachment so that the retina becomes detached. When detached, cannot compose picture, and the patient is losing vision.
The macula is a small area at the centre of the retina which is responsible for what we see straight in front of us, allowing us to see fine detail for activities such as reading and writing, as well as our ability to see colour. Vision can be severely affected if the cells of the macula are damaged and stop working – this is known as age-related macular degeneration (AMD). AMD is an eye disease that causes loss of central vision, leaving only peripheral os side vision intact. AMD is the leading cause of registered blindness for people over 50 in the Western world. Symptoms include blurred vision or distortion (with straight lines appearing wavy and objects appearing to be an unusual size or shape). In more advanced cases, sufferers develop a blank patch or dark spot in the centre of their sight which makes reading, writing and recognising some objects difficult.