WP 2.3: Using pulsed light as a diagnosis tool in eyes with cataract

The research involves the development of a non-invasive perimeter that uses pulsed infrared light (1064 nm) to measure retinal luminance sensitivity at different eccentricities. Unlike conventional perimetry, this approach remains reliable in the presence of cataracts, since infrared light is less affected by scattering in ocular media. The instrument exploits two-photon absorption in photoreceptors, making infrared stimuli perceptible as visible light, and integrates a picosecond laser, motorized filters, galvo scanning, refractive error correction, and pupil tracking. The setup enables precise threshold measurements and the generation of three-dimensional retinal sensitivity maps, providing a robust tool for functional retinal assessment.