Macular degeneration is an age-related disorder and hence, is also known as age-related macular degeneration (ARMD or AMD).
Location of macula:
If you look at the structure of the human eye, the area at the back of the eyeball is called the retina. The retina is the most sensitive area in the eye with sensitivity to light. When light strikes the retina, a series of electrical & chemical reactions creates a nerve impulse which is then transmitted to the brain via the optic nerve.
Near the centre of the eye, a pigmented, oval-shaped area is located which is called the Macula.
Function of Macula:
Macula is yellow in colour and hence absorbs any extra UV or blue light that enters the eye. Basically, it acts as the eye’s sunglasses for this area of the retina.
For high- acuity vision macula is filled with structures called cones (high-acuity photoreceptors).
Causes of Macular degeneration:
Over a period of time, due to old age, the following changes may happen in the macula:
- Abnormal deposits in the macula.
- Blood vessel leaks in that area.
Effects of Macular degeneration:
Patients with Macular degeneration may have the following symptoms:
- Drop in vision.
- Distortion in vision.
- Any alteration in vision.
- Loss of central vision.