When does diabetes affect the eyes?
The eyes contain some of the smallest and most delicate blood vessels in the body. At the back of the eye is the retina, a layer of tissue that detects light and sends information to the brain so we can see.
When blood glucose remains high over a long period of time, it can damage the tiny blood vessels that supply the retina. These damaged vessels may leak fluid or blood, while other blood vessels can become blocked. In more advanced cases, the eye may begin growing abnormal new blood vessels that can cause further damage.
This damage can lead to diabetic retinopathy, one of the most common eye complications associated with diabetes.
When the damage is hard to notice
One of the biggest problems with diabetic eye disease is that it may not cause noticeable symptoms at first. Someone can have damage developing inside their eyes while their vision still seems completely normal.
As the condition progresses, symptoms can include blurry or wavy vision, dark spots, changes in color vision, or areas of vision loss. This is why waiting until vision problems appear is not the best way to detect diabetic eye disease.
Regular eye exams can find changes before significant vision loss occurs. The American Diabetes Association recommends comprehensive, dilated eye examinations for people with diabetes based on their type of diabetes, how long they have had it, and whether retinopathy is already present.
Other ways diabetes affects the eyes
Diabetes can affect the eyes in several different ways. Another condition is diabetic macular edema, which happens when fluid builds up in the macula, the part of the retina responsible for sharp central vision. This can make it harder to read, recognize faces, or see details clearly.
People with diabetes are also more likely to develop cataracts and glaucoma. Cataracts cause the normally clear lens of the eye to become cloudy, while glaucoma can damage the optic nerve that connects the eye to the brain.
Protecting vision starts with diabetes care
Taking care of diabetes can also mean taking care of the eyes. Managing blood glucose, blood pressure, and cholesterol can help reduce the risk of developing diabetic retinopathy or slow its progression.
Regular eye examinations are important too. During a dilated eye exam, an eye care professional can look closely at the retina and identify changes that may not yet be affecting vision.
Early detection matters because treatment can help prevent further vision loss. Depending on the condition and how advanced it is, doctors may use medications, laser treatment, or surgery to treat diabetic eye disease.
Looking beyond what we can see
Diabetes and eye health may not seem connected at first, but the relationship shows how one condition can affect multiple parts of the body. Damage to tiny blood vessels can eventually affect the retina, potentially changing how a person sees the world.
The most important part is that diabetic eye disease is not always something people notice on their own. Regular eye exams and proper diabetes management can help identify problems early and protect vision.