20.2

Retinal Light Toxicity (Photochemical)

Introduction:

Accidental light-induced injuries to the retina from a photochemical mechanism can occur from prolonged exposure to the sun, from a welding arc, and from intra-operative microscope illumination.

Clinical Features:

Retinal phototoxicity from the sun or a welding arc appears as small, round, well-circumscribed, yellow acquired vitelliform-like lesions in the fovea (Fig. 20.2.1). Microscope phototoxicity appears as a more broad area that is fairly well-circumscribed either in the inferior or superior macula (dependent on tilt of microscope).

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