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Corneal function during normal and high serum glucose levels in diabetes
N A McNamara1, R J Brand, K A Polse
1Morton D. Sarver Laboratory for Cornea and Contact Lens Research, School of Optometry, University of California at Berkeley, 94720-2020, USA.
Investigative Ophthalmology & Visual Science
|January 16, 1998
Summary
Type 1 diabetes alters corneal structure and function, showing reduced swelling and slower recovery from hypoxia. Acute hyperglycemia in diabetics lessened corneal swelling, suggesting an impact on hydration control.
Area of Science:
- Ophthalmology
- Endocrinology
- Diabetic Complications
Background:
- Type 1 diabetes is associated with microvascular complications affecting various organs.
- The cornea, a transparent avascular tissue, may be susceptible to metabolic changes in diabetes.
Purpose of the Study:
- To evaluate corneal structure and function in individuals with type 1 diabetes.
- To investigate the impact of acute hyperglycemia on corneal edema and recovery.
Main Methods:
- Compared baseline corneal parameters (IOP, CT, CAF, CST, endothelial cell density) between 21 diabetic and 21 non-diabetic subjects.
- Assessed corneal response to induced edema and recovery rates under euglycemic and hyperglycemic conditions in diabetics.
Main Results:
- Diabetic subjects exhibited distinct baseline corneal measurements compared to controls.
- Diabetic corneas showed reduced swelling and slower recovery from hypoxic edema.
- Acute hyperglycemia in diabetics resulted in less corneal swelling than euglycemia.
Conclusions:
- Diabetic individuals display altered corneal structure and impaired hypoxic edema recovery.
- Hyperglycemia appears to influence corneal hydration regulation in type 1 diabetes.