How diabetes can damage the retina
The retina is the light-sensitive layer of cells at the back of the eye. It converts light into electrical signals. The signals are sent to the brain through the optic nerve and the brain interprets them to produce the images that you see. To work effectively, the retina needs a constant supply of blood, which it receives through a network of tiny blood vessels. Over time, a continuously high blood sugar level can cause the blood vessels to become blocked or to leak. This damages the retina and stops it from working.
Symptoms of diabetic retinopathy
During the initial stages, retinopathy does not cause any noticeable symptoms. You may not realise that your retina is damaged until the later stages, when your vision becomes affected.
Possible symptoms of late-stage retinopathy include:
- shapes floating in your field of vision (floaters)
- blurred vision
- reduced night vision
- sudden blindness
If you have diabetes and start to notice problems with your vision, contact your GP or diabetes care team immediately.
Screening for diabetic retinopathy
As retinopathy can cause blindness, it is very important that it is identified and treated as early as possible. The NHS Diabetic Eye Screening Programme aims to reduce the risk of vision loss in people with diabetes. This is done by identifying retinopathy at an early stage and, if necessary, ensuring that appropriate treatment is given. Everyone with diabetes who is 12 years of age or over is invited for screening once a year.
Mackie Opticians can also identify diabetic eye disease using the new grading standard using our OCT technology to scan your eye in addition to taking a fundus photograph where applicable.
Treating diabetic retinopathy
Treatment for retinopathy will depend on the stage the condition has reached. For example, if retinopathy is identified in its early stages, it may be possible to treat it by controlling your diabetes more effectively. If you have more advanced retinopathy, you may need to have laser surgery or anti vegF injections to prevent further damage to your eyes.
Preventing diabetic retinopathy
To reduce your risk of developing retinopathy, it is important to control your blood sugar level and keep your blood pressure as close to normal as possible. Other steps that you can take to help prevent retinopathy include:
- attending your annual screening appointment
- informing your Optician if you notice any changes to your vision (do not wait until your next screening appointment)
- taking your medication as prescribed
- losing weight (if you’re overweight) and eating a healthy, balanced diet
- exercising regularly
- giving up smoking (if you smoke)