Corneal Hydration Control in Fuchs' Endothelial Corneal Dystrophy

Area of Science:

• Ophthalmology
• Corneal Disease
• Endothelial Function

Background:

• Fuchs' endothelial corneal dystrophy (FECD) is a progressive condition affecting corneal clarity.
• Assessing endothelial function is crucial for understanding FECD progression and management.

Purpose of the Study:

• To evaluate corneal hydration control in FECD patients of varying severity.
• To correlate corneal hydration recovery with morphologic parameters like corneal thickness and backscatter.

Main Methods:

• Corneal swelling induced by low-oxygen contact lenses in FECD patients and controls.
• Measured percent recovery per hour (PRPH) of central corneal thickness.
• Correlated PRPH with endothelial cell density (ECDe) and corneal backscatter using Scheimpflug imaging.

Main Results:

• Corneas swelled by 9% after 2 hours of contact lens wear.
• Corneal hydration recovery (PRPH) was significantly slower in advanced FECD (37%/h) compared to controls (49%/h).
• Lower PRPH correlated with increased disease severity, reduced ECDe, and higher corneal backscatter.

Conclusions:

• Corneal hydration control is impaired in advanced FECD.
• Anterior corneal backscatter is inversely related to hydration control and may indicate endothelial dysfunction in FECD.