Corneal Endothelial Alterations in Chronic Renal Failure

Area of Science:

• Ophthalmology
• Nephrology
• Cell Biology

Background:

• Chronic renal failure (CRF) affects multiple organ systems.
• The ocular manifestations of CRF are not fully understood.
• Corneal endothelium plays a crucial role in maintaining corneal clarity.

Purpose of the Study:

• To investigate corneal endothelial changes in patients with CRF.
• To compare endothelial parameters between dialyzed, non-dialyzed CRF patients, and healthy controls.
• To assess the correlation between blood parameters and corneal endothelium in CRF.

Main Methods:

• Specular microscopy was used to examine 128 corneas from 128 subjects.
• Subjects were divided into three groups: dialyzed CRF (n=32), non-dialyzed CRF (n=34), and age-matched controls (n=64).
• Endothelial parameters, including central corneal thickness (CCT) and cell density (CD), were analyzed and correlated with blood urea, serum creatinine, calcium, and phosphorus levels.

Main Results:

• Significant differences in CCT and CD were observed between all three groups (P < 0.001 to P = 0.023).
• Dialyzed patients showed greater alterations (higher CCT, lower CD) compared to non-dialyzed and control groups.
• Blood urea levels showed a significant correlation with CCT, CD, coefficient of variation, and hexagonality.

Conclusions:

• Corneal endothelial alterations are evident in CRF patients.
• Hemodialysis and elevated blood urea levels exacerbate these corneal changes.
• These findings highlight the systemic impact of CRF on ocular health.