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Diabetic Retinopathy Explained

diabetic retinopathy

Diabetic retinopathy is an eye condition that affects the retina in people who have diabetes.  The retina is the light sensitive tissue that lines the back of the eye, detects light which is then processed as an image by the brain.  Chronically high blood sugar or large fluctuations in blood sugar can damage the blood vessels in the retina.  This can result in bleeding in the retina or leakage of fluid.

Diabetic retinopathy can be divided into non-proliferative or proliferative diabetic retinopathy.

Non-proliferative diabetic retinopathy: In the early stage of the disease, there is weakening of the blood vessels in the retina causing out-pouching called microaneurysms.  These microaneurysms can leak fluid into the retina.  There can also be yellow deposits called hard exudates present in the retina from leaky vessels.

Diabetic macula edema is when the fluid leaks into the region of the retina called the macula.  The macula is important for sharp, central vision needed for reading and driving.  The accumulation of fluid in the macula causes blurry vision.

Proliferative diabetic retinopathy: As diabetic retinopathy progresses, new blood vessels grow on the surface of the retina.  These blood vessels are fragile and makes them likely to bleed into the vitreous, which is the clear gel that fills the middle of the eye.  Bleeding inside the eye is seen as floaters or spots.  Over time, scar tissue can then form on the surface of the retina and contract leading to a retinal detachment, similar to wallpaper contracting and peeling away from the wall.  If left untreated, retinal detachment can lead to loss of vision. 

Symptoms of diabetic retinopathy

·      Asymptomatic: In the early stages of mild non proliferative diabetic retinopathy, the person will usually have no visual complaints.  Therefore, it is important for people with diabetes to have a comprehensive dilated exam by your eye doctor once a year.

·      Floaters: This is usually from bleeding into the vitreous cavity from proliferative diabetic retinopathy.

·      Blurred vision: This can be the result of fluid leaking into the retina, causing diabetic macular edema. 

Risk factors for diabetic retinopathy

·      Blood sugar. Lower blood sugar will delay the onset and slow the progression of diabetic retinopathy.  Chronically high blood sugar and the longer the duration of diabetes, the more likely chance of that person having diabetic retinopathy.

·      Medical conditions. People with high blood pressure and high cholesterol are at greater risk for developing diabetic retinopathy.

·      Ethnicity.  Hispanics, African Americans and Native Americans are at greater risk for developing diabetic retinopathy.

·      Pregnancy.  Women with diabetes, may increase their risk of developing diabetic retinopathy during pregnancy.  If they already have diabetic retinopathy, then they may have worsening of their diabetic retinopathy.

Part 2-- Diabetic Retinopathy diagnosis and treatment.

Watch our Diabetic Retinopathy video below.






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Diabetic Retinopathy Diagnosis and Treatment

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Saturday, 23 September 2017

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