Retinopathy is a disease of the retina . The retina is the nerve layer that lines the back of your eye. It is the part of your eye that "takes pictures" and sends the images to your brain. Many people with diabetes get retinopathy. This kind of retinopathy is called diabetic retinopathy (retinal disease caused by diabetes).Diabetic retinopathy can lead to poor vision and even blindness. Most of the time, it gets worse over many years. At first, the blood vessels in the eye get weak. This can lead to blood and other liquid leaking into the retina from the blood vessels. This is called nonproliferative retinopathy. And this is the most common retinopathy. If the fluid leaks into the center of your eye, you may have blurry vision. Most people with nonproliferative retinopathy have no symptoms.
If blood sugar levels stay high, diabetic retinopathy will keep getting worse. New blood vessels grow on the retina. This may sound good, but these new blood vessels are weak. They can break open very easily, even while you are sleeping. If they break open, blood can leak into the middle part of your eye in front of the retina and change your vision. This bleeding can also cause scar tissue to form, which can pull on the retina and cause the retina to move away from the wall of the eye (retinal detachment). This is called proliferative retinopathy. Sometimes people don't have symptoms until it is too late to treat them. This is why having eye exams regularly is so important.
Retinopathy can also cause swelling of the macula of the eye. This is called macular edema. The macula is the middle of the retina, which lets you see details. When it swells, it can make your vision much worse. It can even cause legal blindness. If you are not able to keep your blood sugar levels in a target range, it can cause damage to your blood vessels. Diabetic retinopathy happens when high blood sugar damages the tiny blood vessels of the retina.
When you have diabetic retinopathy, high blood pressure can make it worse. High blood pressure can cause more damage to the weakened vessels in your eye, leading to more leaking of fluid or blood and clouding more of your vision.
Most of the time, there are no symptoms of diabetic retinopathy until it starts to change your vision. When this happens, diabetic retinopathy is already severe. Having your eyes checked regularly can find diabetic retinopathy early enough to treat it and help prevent vision loss.
If you notice problems with your vision, call an eye doctor (ophthalmologist) right away. Changes in vision can be a sign of severe damage to your eye. These changes can include floaters, pain in the eye, blurry vision, or new vision loss
There is no cure for diabetic retinopathy. But laser treatment (photocoagulation) is usually very effective at preventing vision loss if it is done before the retina has been severely damaged. Surgical removal of the vitreous gel (vitrectomy) may also help improve vision if the retina has not been severely damaged. Sometimes injections of an anti-VEGF (vascular endothelial growth factor) medicine or an anti-inflammatory medicine help to shrink new blood vessels in proliferative diabetic retinopathy. Because symptoms may not develop until the disease becomes severe, early detection through regular screening is important. The earlier retinopathy is detected, the easier it is to treat and the more likely vision will be preserved.
You may not need treatment for diabetic retinopathy unless it has affected the center (macula) of the retina or, in rare cases, if your side (peripheral) vision has been severely damaged. But you do need to have your vision checked regularly.
If the macula has been damaged by macular edema, you may need laser treatment. For more severe retinopathy, you may need either laser treatment or vitrectomy. These procedures can help prevent, stabilize, or slow vision loss when they are done before the retina has been severely damaged. Newer treatment includes medicines like anti-VEGF medicine or steroids that are injected into the eye.
Surgical removal of the vitreous gel (vitrectomy) is done when there is bleeding (vitreous hemorrhage) or retinal detachment, which are rare in people with early-stage retinopathy. Vitrectomy is also done when severe scar tissue has formed.
Treatment for diabetic retinopathy is often very effective in preventing, delaying, or reducing vision loss. But it is not a cure for the disease. People who have been treated for diabetic retinopathy need to be monitored frequently by an eye doctor to check for new changes in their eyes. Many people with diabetic retinopathy need to be treated more than once as the condition gets worse.
Also, controlling your blood sugar levels is always important. This is true even if you have been treated for diabetic retinopathy and your eyes are better. In fact, good blood sugar control is especially important in this case so that you can help keep your retinopathy from getting worse.
Ideally, laser treatment should be done early in the course of the disease to prevent serious vision loss rather than to try to treat serious vision loss after it has already developed.
People with diabetes who have any signs of retinopathy need to be examined as soon as possible by an ophthalmologist.