There is a strong link between type 2 diabetes and eye problems, specifically diabetic retinopathy. This condition, which is caused by damage to the blood vessels in the retina, is a leading cause of blindness among working-age adults.
One study, published in the Journal of Diabetes Investigation, found that "the prevalence of diabetic retinopathy was positively associated with the duration of diabetes and negatively associated with better glycemic control."
Another study, published in the American Journal of Ophthalmology, found that "tight glycemic control may reduce the progression of diabetic retinopathy."
A systematic review and meta-analysis published in the British Medical Journal (BMJ) in 2018, showed that intensive blood glucose control and blood pressure control can reduce the risk of diabetic retinopathy by about 25-30%.
Additionally, a study published in the Journal of Diabetes and its Complications in 2019 found that "people with type 2 diabetes who have poor blood sugar control and high blood pressure are at a higher risk of developing diabetic retinopathy."
These studies suggest that maintaining good glycemic control and blood pressure can help reduce the risk of diabetic retinopathy and other eye problems associated with type 2 diabetes.
It is important to note that people with type 2 diabetes should have regular eye exams to detect any potential problems early, as early detection and treatment can help prevent vision loss.