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  • Neuropathy in eyes...

Neuropathy in eyes begins long before type 2 diabetes is diagnosed, suggests study

Written By : Dr. Kamal Kant Kohli Published On 2022-09-25T19:30:28+05:30  |  Updated On 25 Sept 2022 7:30 PM IST
Neuropathy in eyes begins long before type 2 diabetes is diagnosed, suggests study
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Neuropathy is a common and serious complication of type 2 diabetes which can affect nerves in different parts of the body. This may cause pain and numbness in the legs, feet and hands, as well as muscle and organ problems.

Dutch researchers have found in a new study that nerve damage in the eyes begins long before type 2 diabetes is diagnosed.

New research has been presented at the annual meeting of the European Association for the Study of Diabetes in Stockholm, Sweden (19-23 Sept). suggests that damage to nerves in the cornea begins before type 2 diabetes is diagnosed.


Loss of nerves in the cornea can cause a range of problems from dry eye to vision loss. It was used in this study as proxy for neuropathy throughout the body.

Dr Sara Mokhtar, of the Department of Internal Medicine, Maastricht University Medical Center+, Maastricht, Netherlands, and colleagues studied the health of the corneal nerves in people with diabetes, pre-diabetes (where blood sugar levels are higher than normal but not high enough to be classed as T2D) and people without T2D or pre-diabetes (people with normal glucose metabolism).

The 3,471 participants (48.4% men) had an average age of 59.4 years. 21% had T2D, 14.7% had pre-diabetes and 64.3% had neither T2D nor pre-diabetes.

The amount of damage to the corneal nerve fibres rose in line with the amount of impairment to glucose metabolism. The amount of corneal nerve damage was 8% higher with pre-diabetes than in those with normal glucose metabolism and 8% higher in those with T2D than in those with pre-diabetes. When comparing those with T2D with people with normal glucose metabolism, those with T2D at 14% more nerve damage.

Higher blood sugar levels, including higher HbA1c (average blood sugar level over several months) and 2-hour post-load glucose (blood sugar level two hours after a meal), were also associated with higher levels of corneal nerve damage.

And the higher the blood sugar levels were, the greater the damage. Participants who had had diabetes for longer also had more damage to their corneal nerves. The researchers conclude that the amount of damage to the corneal nerve fibres increased linearly with the amount of impairment to glucose metabolism and with blood sugar levels.

Dr Mokhtar says: "We know from other studies that it typically takes three to five years to progress from prediabetes to type 2 diabetes. Our results, from the first study of its kind, suggest that high levels of blood sugar can begin to damage corneal nerves long before type 2 diabetes develops.

"Nerve damage in the cornea is relatively easy to measure and provides a window to nerve damage elsewhere in the body. If we could pick up nerve damage early on, we might be able to delay or prevent it and the problems it causes, and so significantly improve quality of life.

Reference:

Nerve damage in the eyes begins long before type 2 diabetes is diagnosed, Dutch study suggests. "DIABETOLOGIA|" MEETING The European Association for the Study of Diabetes Annual Meeting

Diabetologianerve damageeyestype 2 diabetesT2Dcorneaneuropathyblood sugar
Source : Diabetologia
Dr. Kamal Kant Kohli
Dr. Kamal Kant Kohli

Dr Kamal Kant Kohli-MBBS, DTCD- a chest specialist with more than 30 years of practice and a flair for writing clinical articles, Dr Kamal Kant Kohli joined Medical Dialogues as a Chief Editor of Medical News. Besides writing articles, as an editor, he proofreads and verifies all the medical content published on Medical Dialogues including those coming from journals, studies,medical conferences,guidelines etc. Email: drkohli@medicaldialogues.in. Contact no. 011-43720751

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