Diabetic retinopathy begins as a mild disease. During the early stage of the
disease, the small blood vessels in the
retina become weaker and develop small bulges called
microaneurysms. These microaneurysms are the earliest signs of retinopathy and
may appear a few years after the onset of diabetes. They may also burst and
cause tiny blood spots (hemorrhages) on the retina. But they do not usually
cause symptoms or affect vision. This is called nonproliferative retinopathy. At this stage, treatment is not required.
As retinopathy progresses, fluid
and protein leak from the damaged blood vessels and cause the retina to swell.
This may cause mild to severe vision loss, depending on which parts of the
retina are affected. If the center of the retina (macula) is affected, vision loss can be severe.
Swelling and distortion of the macula (macular edema), which results from a
buildup of fluid, is the most common complication of retinopathy. Macular edema treatment usually works to stop and sometimes reverse your loss of vision.
Colleen Schultz was stunned to learn that her blood sugar level was high during a routine doctor visit in the fall of 2010. Though she did not have diabetes, her results were in the prediabetes range. "I was very upset," says Schultz, a drapery fabricator in Voorheesville, N.Y. "It was depressing thinking I was falling apart. I didn't want to take medications for the rest of my life."
Her doctor gave her a prescription, which Schultz tried and then decided she'd rather focus on her doctor's other...
In some people, retinopathy gets worse over the course of several years and progresses to proliferative retinopathy.
In these cases, reduced blood flow to the retina stimulates the growth
(proliferation) of fragile new blood vessels on the surface of the retina. As the new blood vessels
multiply, one or more complications may develop and damage the person's vision.
These complications can include:
The formation of scar tissue that pulls on the
retina, which may lead to
Bleeding inside the
eye (preretinal or vitreous hemorrhage).
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