Repurposing blue laser autofluorescence to measure ocular sun exposure

Area of Science:

• Ophthalmology
• Ocular diagnostics
• Photobiology

Background:

• Excessive ocular sun exposure causes eye pathologies.
• Conjunctival ultraviolet autofluorescence (CUVAF) detects sun damage but requires specialized equipment.
• Blue laser autofluorescence (BAF) using a confocal scanning laser ophthalmoscope (cSLO) is explored as an alternative measurement method.

Purpose of the Study:

• To evaluate the utility of BAF on a cSLO for measuring CUVAF area.
• To determine if BAF can serve as a viable alternative to custom CUVAF camera systems.

Main Methods:

• A cross-sectional study evaluated BAF and a conventional CUVAF camera system.
• Images were captured from 50 participants (after exclusions) using both systems.
• Two independent graders measured CUVAF area, comparing repeatability and agreement between the two methods.

Main Results:

• Intra- and inter-observer repeatability were comparable between BAF and the conventional CUVAF camera.
• Mean differences in CUVAF area measurements between BAF and the camera were small (+1.00 mm² and +0.21 mm² for the two graders).
• 95% limits of agreement indicated good consistency between the methods.

Conclusions:

• BAF on a commercially available cSLO is a valid and accessible tool for measuring CUVAF area.
• This method facilitates broader identification, monitoring, and research of sun-exposure-related ocular conditions.
• It enhances opportunities for patient education and understanding of ocular sun damage impacts.