Corneal polarimetry after LASIK refractive surgery

Area of Science:

• Ophthalmology
• Biomedical Optics
• Corneal Imaging

Background:

• Corneal biomechanical properties are crucial for ocular health and can be altered by refractive surgery or disease.
• Imaging polarimetry offers a non-invasive method to probe tissue microstructure and optical properties.

Purpose of the Study:

• To compare spatially resolved polarization parameters between normal healthy and post-LASIK eyes using a novel aberro-polariscope.
• To investigate the potential of imaging polarimetry for assessing corneal changes after refractive surgery.

Main Methods:

• Development and application of a custom-built aberro-polariscope.
• Acquisition and analysis of spatially resolved polarization maps (depolarization, retardation, slow axis) across the pupil.
• Comparative analysis between normal healthy (n=?) and post-LASIK (n=?) eyes.

Main Results:

• Post-LASIK eyes exhibited non-uniform depolarization distributions with increased levels compared to normal eyes.
• Retardation patterns, which increase radially in normal eyes, became irregular after LASIK.
• Slow axis maps showed greater disorder in post-LASIK corneas, indicating structural modifications.

Conclusions:

• Imaging polarimetry can detect subtle structural and optical changes in the cornea following LASIK surgery.
• This technique shows promise for clinical applications in monitoring post-surgical corneal biomechanics and diagnosing pathologies.