Visual Function in Pseudophakic Eyes with Fuchs' Endothelial Corneal Dystrophy.

Area of Science:

• Ophthalmology
• Corneal Disease
• Vision Science

Background:

• Fuchs' endothelial corneal dystrophy (FECD) affects the cornea's inner lining.
• Early detection of vision changes in FECD is crucial for management.
• Pseudophakia (presence of an intraocular lens) can influence corneal health assessment.

Purpose of the Study:

• To evaluate visual function in pseudophakic eyes with FECD before clinical signs of corneal edema appear.
• To correlate subclinical tomographic findings with visual acuity and straylight measurements in FECD patients.

Main Methods:

• A cross-sectional study involving pseudophakic eyes with and without FECD.
• Clinical assessment of guttae severity and measurement of high-contrast visual acuity (HCVA), low-contrast visual acuity (LCVA), and straylight.
• Scheimpflug tomography used to identify subclinical edema features: isopach irregularity, thinnest point displacement, and posterior surface depression.

Main Results:

• Eyes with FECD and normal tomography (no subclinical edema) showed visual acuity and straylight comparable to normal corneas, regardless of guttae severity.
• Eyes with FECD exhibiting all three tomographic edema features had significantly worse visual acuity and higher straylight than normal corneas.
• Intermediate tomographic abnormalities correlated with reduced mesopic LCVA and increased straylight.

Conclusions:

• Vision impairment in FECD is linked to the presence of tomographic signs of subclinical corneal edema.
• Normal visual acuity and straylight in FECD eyes without tomographic edema suggest no immediate need for surgical intervention for visual improvement.
• Tomography is valuable in detecting early corneal changes that impact vision in FECD.