She explained: “Diabetes that isn’t managed well can lead to blindness, although not directly.

“Having high blood sugar consistently over time can cause diabetic retinopathy which damages the back of the eye (the retina).

“If diabetic retinopathy is left untreated, then it can cause blindness, so it’s best to keep to the recommended daily sugar intake where possible.

“Unmanaged diabetes can also lead to cataracts and glaucoma.”

Protecting your eyes

She urged people with diabetes to attend regular eye check-ups as a way to protect their sight.

“Diabetics must have their eyes checked regularly to ensure the eyes remain healthy and disease-free,” Ms Patel said.

“For people with diabetes, the best way to avoid eye problems is to manage the symptoms of your diabetes by controlling the levels of blood sugar and going for regular check-ups, both for the body and the eyes.”

How to prevent developing diabetes

It is not yet known exactly what causes type 1 diabetes.

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However, type 2 diabetes is often the result of various lifestyle factors although it can also be genetic.

To lower your risk for type 2 diabetes, Ms Patel recommends you:

• Don’t smoke
• Exercise regularly
• Avoid alcohol
• Keep within the recommended daily sugar limit
• Eat a variety of fruits, vegetables and wholegrains
• Avoid stress
• Get enough sleep.

She added: “Food is a huge factor in supporting our overall health.

“Consuming a variety of vegetables, fruits, nuts, pulses, and fatty acids will support your eye health and help prevent or control diabetes.

“With food being such a powerful tool in promoting good health, it’s good to try and eat a broad range of different foods to make sure you’re covering all the nutrition bases.”

If you have diabetes and are concerned about your eyes you should speak to a GP or optician.

Common symptoms of diabetes include:

• Feeling very thirsty
• Urinating more frequently than usual, particularly at night
• Feeling very tired
• Weight loss and loss of muscle bulk
• Itching around the penis or vagina, or frequent episodes of thrush
• Blurred vision.