Polarization of human donor corneas

Area of Science:

• Ophthalmology
• Biomedical Engineering
• Corneal Science

Background:

• Descemet's stripping automated endothelial keratoplasty (DSAEK) is a common corneal transplantation technique.
• Assessing graft orientation and tissue quality is crucial for successful outcomes.
• Objective methods to evaluate corneal optical properties are needed.

Purpose of the Study:

• To investigate the de-orientation effect on human donor corneas using a polarizing device (Lumaxis®).
• To evaluate the polarization power and cross patterns of corneas during simulated DSAEK graft preparation.
• To explore the potential of polarization analysis as an objective measure of corneal tissue quality.

Main Methods:

• Forty human donor corneas were analyzed using a Lumaxis® polarizing device.
• Corneas were subjected to simulated graft preparation, including cuts and rotations up to 45°.
• Polarization power and cross patterns were monitored and recorded at various stages.

Main Results:

• A statistically significant difference (p < 0.05) in polarizing power was observed with angular changes.
• Corneal cross patterns deformed and lost sharpness as the tissue was rotated by 45°.
• The Lumaxis® device identified poor quality tissue based on polarization characteristics.

Conclusions:

• Polarization analysis with Lumaxis® can detect changes in corneal tissue during simulated DSAEK preparation.
• Observed changes in polarization power and cross patterns may serve as objective parameters for evaluating corneal optical properties.
• Further research is needed to establish the clinical relevance of these polarization changes for visual acuity in patients receiving DSAEK grafts.