Diabetic Eye Disease
Diabetic macular oedema
Diabetic macular oedema is a diabetic complication caused by the accumulation of fluid in the macular. The macular is found at the back of the eye, on the retina and consists of nerve cells called cones, which are responsible for the perception of light. Over the course of illness, diabetic patients may experience a complication known as diabetic retinopathy. Diabetic retinopathy is characterized by damaged blood vessels in the eye, and escape of fluid from the blood vessels. Accumulation of fluid in the macular causes the cones to lose their ability to perceive light, leading to vision problems including double vision, blurry vision, and eye floaters (moving spots in the field of vision).
Depending on the method in which fluid enters the macular, diabetic macular oedema can be classified into the following:
- Focal diabetic macular oedema: caused by rings of hard deposits formed from the leakage of micro aneurysms (abnormal blood vessels)
- Diffuse macular oedema: caused by leakage from retinal capillaries and arterioles (blood vessels located at the back of the eye), and micro aneurysms.