Diabetes and Blurry Vision: Causes and Concerns

Jeannette | Posted on August 12, 2022 
diabetes blurry vision

Diabetic blurry vision makes it difficult for a person to distinguish minute details in what you are seeing. Diabetes can have several origins, as it might be an indication that your glucose level is out of range – either too much or too low. Fluid draining into the lens of the eyes might be causing your vision to blur. As a result, the lens swells and changes form. These changes make it difficult for your eyes to concentrate, causing everything to appear blurred causing blurry vision due to diabetes.

When you begin insulin therapy, you may have impaired vision. This is caused by shifting fluids, and it usually goes away after a few months. Many people’s vision improves when their blood sugar levels regulate.

This article describes how diabetes can cause blurry vision and how to safeguard it. It also investigates several other potential reasons for hazy vision.

Short-term causes of diabetes:

Short-term blurry vision may occur as a result of low or high blood sugar levels.

Hyperglycemia or high blood sugar:

Fluid can migrate from and into the eye of a diabetic owing to elevated blood sugar levels, often known as hyperglycemia. This might cause the eye’s lens to swell. Since the lens is the portion that focuses light into the backside of the eye, blurriness occurs when the shape changes. This is a temporary problem that usually goes away as blood sugar levels drop. This form of diabetes may cause blurry vision.

Hypoglycemia or low blood sugar:

Insulin users may have hypoglycemia, which occurs when levels of blood sugar fall too low.

This can result in:

  • Blurry vision
  • vision dimness
  • Double vision
  • Impaired contrast perception.

These variations normally disappear when blood sugar rises.

diabetes doctors

Long-term causes of diabetes:

Diabetes-related optical issues tend to worsen over time. This means that they generally deteriorate with time. Following are a few long-term issues that might arise.

Diabetes retinopathy

Diabetic retinopathy damages the retina, which is a component of the eye. In some situations, it might result in eyesight loss. Diabetic retinopathy is the leading reason for visual loss in Western countries. It is the most common ailment that affects persons with diabetes. It occurs when elevated blood sugar levels have an effect on the small arteries in the eye.

There are two stages of diabetic retinopathy:

Nonproliferative diabetic retinopathy (NPDR), often known as background retinopathy, is the first stage. At this time, people may not detect any symptoms.

Some people acquire proliferative diabetic retinopathy over time or PDR. This is an advanced and intense stage that can have a significant influence on eyesight. Although diabetic retinopathy may not necessarily advance to PDR, data show that when NPDR gets severe, 75% of patients will develop to PDR within one year.

Other reasons for blurry vision or vision loss can develop in conjunction with diabetes, especially when it comes to getting older

They consist of:

  • Cataracts occur when the surface of the eye becomes clouded;
  • Glaucoma occurs when an accumulation of pressure in the eye affects the primary nerve that connects the eye to the brain, and damage to the eye’s surface occurs.
  • Diabetic papillopathy, or enlargement and fluid buildup inside one or both optic nerve discs caused by blood vessel leaking
  • Age-related macular degeneration
  • Occlusion of the retinal arteries
  • Ischemic optic neuropathy

Reactions caused by diabetes treatment:

When they initiate using insulin to manage high blood sugar levels, some patients experience changes in their eyesight like blurry eyes due to diabetes or impaired vision.

Earlier a study from 2010 investigated how starting insulin treatment impacted the eyesight of 26 diabetics. After three days, nine persons noticed an increase in their blurry vision, but their eyesight returned to normal after ten days.

How long a blurry eye vision could last?

Blurry vision can be caused by both short-term and long-term diabetic problems.

When blood sugar levels restore to 70-130 milligrams per deciliter (mg/dL), short-term blurry vision caused by low or high blood sugar levels generally resolves. Diabetic retinopathy, for example, is a progressive illness that worsens over time as a result of consistently high blood sugar levels.

Although it is not reasonable to recover from the damage caused by the factors discussed above, regulating glucose levels and adhering to a treatment plan can help delay their progression.

When you should visit the doctor?

Blurred vision can be caused by a variety of factors, including early signs of diabetes. If a person experiences any of the following symptoms, they should consult an eye doctor:

  • They possess diabetes and haven’t had an eye exam in a year.
  • They have diabetes and are experiencing eyesight issues.
  • Vision changes occur quickly or worsen.

Eye issues can occur as a result of a new case of diabetes or as a consequence of a current condition.


Frequent diabetes eye exams help uncover complications in the early stages in diabetics.

If you have early signs of eye issues, your doctor would most likely advise you:

  • A treatment plan to assist regulate glucose levels
  • Managing excessive blood pressure, which may have an impact on eye health
  • More frequent eye examinations and monitoring

To an extent, these measures may halt or prevent additional developments of the disorder.

Lifestyle adaptations:

People who have diabetes-related eye issues like blurry vision should begin taking preventive actions to safeguard their eyesight.

Among the suggestions are:

  • Regulating blood sugar levels to decrease the likelihood of diabetic retinopathy or to prevent it from getting worst
  • Adhering to a treatment plan agreed upon with a doctor, which includes precise dietary, exercise, and pharmacological requirements
  • Maintaining excessive blood pressure, or hypertension, because this can lead to vision difficulties
  • Having regular eye exams and getting assistance if changes or difficulties emerge

If retinopathy or other reasons for vision difficulties continue to an advanced stage, a person may require specialized eye care.

See Also: Reflux And Diabetes

Bottom line:

Diabetes complications might include blurry eye vision. Diabetic retinopathy, cataracts, glaucoma, and low or high blood sugar are all potential causes. However, many of these symptoms can occur in people who do not have diabetes, particularly as they become older.

Blood sugar control and frequent eye exams can help avoid blurry visual disorders. Regular inspections may also discover issues at an early stage, during which they are easy to address. Regular eye exams with an eye expert are recommended for patients with diabetes. Everyone with diabetes who is concerned about eye or vision issues should consult a doctor.

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