Effect of Insulin on Eyesight

Effect of Insulin on Eyesight

Diabetes has been found to result in a loss of eyesight. In some cases, it is a minor problem that can be resolved by stabilizing sugar levels in your blood or by putting in prescribed eye drops. 

However, if it is a major problem, then you should consider consulting your doctor. In fact, blurred vision is one of the first signs of diabetes. 

Diabetes and Eyesight

Diabetes is a metabolic condition in which your body either cannot produce insulin, does not produce insulin, or simply cannot use insulin properly. Insulin is highly important as it helps break down and deliver glucose to cells in your body for energy.

Consequently, this raises your sugar levels in your blood. This can lead to hyperglycemia, which negatively affects your vision.

Low blood sugar also makes your vision blurry temporarily sometimes, clearing up when these levels stabilize.

Blurry Vision

The reason your sight is blurry might be due to fluid leaking into the lens of your eye. This makes the lens swell and changes its shape. Changes like these make it hard for your eyes to focus, so things can start to look fuzzy or blurred out.

You may also get blurry vision after starting your insulin treatment, due to the shifting of fluids. However, this usually resolves after one or two weeks for most diabetic patients. As their blood sugar stabilizes, so does their vision. 

A long-term cause of blurred vision can be diabetic retinopathy, which is a retinal disorder caused by diabetes. This also includes proliferative retinopathy. 

Proliferative retinotherapy is when blood vessels leak into the center of your eye. Aside from blurred vision, you may experience spots, or floaters, or have trouble with night vision.

Blurred vision can also be caused by cataracts, as people with diabetes are known to develop cataracts at a younger age compared to other adults. Cataracts affect the lens of your eyes by making them cloudy. 

When to See the Doctor

If you’re a diabetic patient, then you are at risk of a variety of eye problems including glaucoma, macular edema, and as mentioned before, hyperglycemia. It is important that you have regular checkups and clear glasses that are in check with your eyesight. 

We recommend that you tell your doctor about each symptom so they can diagnose you properly and be sure to mention all the medication you need to take as well. 


To conclude, your blurred vision might be a minor problem with a quick fix such as eye drops or a new prescription of clear glasses. However, it can also be a serious issue caused by diabetes. Therefore, we recommend that you immediately consult your doctor regarding your symptoms and any changes to your vision. In many cases, early treatment is advised as it can correct a problem and also prevent it from getting worse.