Cell size-shape relationships in corneal endothelium

Area of Science:

• Ophthalmology
• Cell Biology
• Corneal Science

Background:

• The corneal endothelium is crucial for maintaining corneal clarity and hydration.
• Understanding endothelial cell morphology is vital for assessing corneal health.
• Previous studies have explored endothelial cell shapes, but comprehensive analysis in normal corneas is ongoing.

Purpose of the Study:

• To quantitatively analyze the shapes of corneal endothelial cells in a cohort of normal human corneas.
• To determine the predominant cell shapes and their distribution within the corneal endothelium.
• To investigate the relationship between cell shape distribution and cell size variation.

Main Methods:

• Specular photomicrographs were obtained from 121 normal human corneas.
• Corneal endothelial cell shapes were analyzed from these photomicrographs.
• Cellular morphology was quantified, categorizing cells by the number of sides (e.g., hexagonal, pentagonal, heptagonal).

Main Results:

• Hexagonal cells were the most predominant shape, ranging from 48% to 90% of the total cells.
• Pentagonal (15% to 35%) and heptagonal (25% to 38%) cells comprised the majority of the remaining endothelial cells.
• A higher percentage of hexagonal corneal endothelial cells was associated with minimal variation in cell size.

Conclusions:

• The normal corneal endothelium exhibits a predominantly hexagonal cell shape.
• The distribution of cell shapes, particularly the prevalence of hexagonal cells, is linked to endothelial cell uniformity.
• These findings contribute to establishing a morphological baseline for healthy human corneal endothelium.