Diabetes type 2: Three indicators you have high blood sugar found in the eyes

Type 2 diabetes can be a 'devastating diagnosis' says expert

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Type 2 diabetes can seem harmless at first glance because the symptoms do not necessarily make you feel unwell. In fact, you can live with the chronic condition for years without knowing it. Diabetes only tends to assert itself when blood sugar levels are consistently high and when this occurs any of these three eye symptoms may develop.


The natural internal lens of a person’s eye allows the eye to see and focus on an image, just like a camera.

When that lens gets cloudy, like a dirty or smudged window, that means a cataract has formed.

Experts warn those suffering with type 2 diabetes tend to get them earlier and it has the potential to get worse faster.

Blurry vision

Blurry vison can be caused by high blood sugar.

The cause for the blur relates to a person’s lens which can swell, affecting a person’s ability to see.

To correct it, you need to get your blood back into the target range.

This includes 70-130 milligrams per decilitre, or mg/dL, before meals, and less than 180 mg/dL one to two hours after a meal.

It may take as long as three months for your vision to fully get back to normal.

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High blood sugar can cause an increase in a specific glycoprotein, called fibronectin, to form in your eye.

Having more fibronectin in your eye may block your eye’s natural drainage system, which can lead to glaucoma.

The American Diabetes Association states that people with diabetes are “more likely to suffer from glaucoma”.

When pressure builds up inside the eye which the fluid is unable to drain as it normally does.

This can damage nerves and blood vessels and cause changes in vision.

Medication is able to help lower eye pressure, speed up drainage and reduce the amount of liquid the eye makes.

Issues occurring with the eyes are possible to be caught early by a GP during an annual exam but if left untreated, vision loss could occur.

Other symptoms of high blood sugar may include:

  • Increased thirst and a dry mouth.
  • Needing to pee frequently.
  • Tiredness.
  • Blurred vision.
  • Unintentional weight loss.
  • Recurrent infections, such as thrush, bladder infections (cystitis) and skin infections.
  • Tummy pain.
  • Feeling or being sick.

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