Illumination system for corneal collagen crosslinking

Area of Science:

• Ophthalmology
• Biomedical Engineering
• Optics

Background:

• Corneal collagen crosslinking (CXL) treats keratectasia, including keratoconus and pellucid marginal degeneration.
• CXL relies on a photosensitizer (Riboflavin) activated by UV light to strengthen corneal collagen.

Purpose of the Study:

• To design and construct a novel ultraviolet (UV) illumination system for CXL procedures.
• To ensure safe and effective delivery of UV light at Riboflavin's absorption peak.

Main Methods:

• Raytracing simulations were employed to evaluate various optical designs.
• The system's mechanical mounting and beam testing apparatus were developed.
• Design compromises were analyzed for clinical safety and practicality.

Main Results:

• The system provides uniform treatment effect over the desired corneal diameter.
• Optical design enhances beam control and safety compared to basic systems.
• A cost-effective prototype was constructed with integrated mounting and testing.

Conclusions:

• The developed UV illumination system offers a balanced approach to CXL.
• It addresses both clinical efficacy and patient eye safety concerns.