Quantification of corneal transparency in post-mortem human corneas using laser scatter image analysis

Area of Science:

• Ophthalmology
• Biomedical Engineering
• Medical Imaging

Background:

• The cornea, a transparent ocular structure, is crucial for vision.
• Current assessment of donor corneas for keratoplasty relies on subjective qualitative methods.
• Subjective assessments introduce bias and variability in evaluating corneal suitability.

Purpose of the Study:

• To develop a simple, feasible, and cost-effective method for quantifying corneal transparency.
• To establish an objective measure for assessing donor cornea quality for transplantation.

Main Methods:

• A modified artificial anterior chamber was used to standardize corneal mounting and pressure.
• A laser beam was passed through the center of mounted corneas.
• Image analysis software (ImageJ) quantified scattered laser spot characteristics (red pixel intensity, max intensity, full-width half max).

Main Results:

• Quantitative data on corneal transparency were obtained using laser scattering.
• Average red intensity: 132.45 ± 6.65 SD.
• Mean max intensity: 51.1 ± 3.78 SD; Full-width half max: 787.7 ± 84.7 SD.

Conclusions:

• Laser quantification offers a simple and cost-effective approach to objectively measure corneal transparency.
• This method provides a proof of principle for improved donor cornea assessment in keratoplasty.