Don’t buy new glasses as soon as you notice that things look blurry. It could just be a small problem caused by high blood sugar. Your lens could swell, which changes your ability to see.
To correct it, you need to get your blood sugar back into the target range (70-130 milligrams per deciliter, or mg/dL, before meals, and less than 180 mg/dL 1 to 2 hours after a meal). It may take as long as 3 months for your vision to fully get back to normal.
Do tell your eye doctor. She can let you know if this is a symptom of a more serious problem.
The lens allows your eye to see and focus on an image, just like a camera. Cataracts cloud your normally clear lens with debris. Anyone can get them, but people with diabetes tend to get them earlier, and they get worse faster.
Pressure builds up inside your eye when fluid can’t drain like it should. This can damage nerves and blood vessels, and cause changes in vision.
Medications can treat open-angle glaucoma, the most common form. They lower eye pressure, speed up drainage, and reduce the amount of liquid your eye makes. (Your doctor will call this aqueous humor.)
With less common forms of the disease, you might notice:
The retina is a group of cells on the back of your eye that take in light. They turn it into images that the optic nerve sends to your brain.
Damage to small blood vessels in your retina causes diabetic retinopathy. It’s related to high blood sugar levels. If you don’t find and treat it early, you could go blind. The longer you have diabetes, the more likely you are to get it. If you keep your blood sugar under control, you lower your chances.
People with type 1 diabetes rarely develop the condition before puberty. In adults, it’s rare to see unless you’ve had type 1 diabetes for at least 5 years. If you keep tight control of your blood sugar with either an insulin pump or multiple daily insulin injections, you’re far less likely to get this condition.
If you have type 2 diabetes, you may have signs of eye problems when you’re diagnosed. Control your blood sugar, blood pressure, and cholesterol to slow or prevent the disease. If you smoke, try to quit. It’ll improve your eyes and your overall health.
There are other types of this condition:
Background retinopathy. Your blood vessels are damaged, but you can still see OK. It can get worse if you don’t manage your diabetes well.
Maculopathy. This is damage to the macula, a critical area of your retina. It can greatly affect your vision.
Proliferative retinopathy. It happens when cells at the back of your eye don’t get enough oxygen and new blood vessels start to grow. They’re fragile, so they can bleed and lead to a clot. This can cause scars and pull your retina away from the back of your eye. If it gets detached, you could have vision loss that can’t be fixed. Sometimes this condition can be treated. Surgery is an option, so is a laser procedure that burns away the blood vessels. It can prevent blindness in up to half the people with early retinopathy.
The Need for Eye Exams
A full yearly checkup can help find problems early, when they’re easier to treat. That could save your vision.
When to Call the Doctor
These symptoms can signal an emergency:
- Black spots in your vision
- Flashes of light
- “Holes” in your vision
- Blurred vision