Erythropsy

Erythropsy is a rare visual disturbance characterized by the temporary perception of everything in a reddish hue. This condition is often associated with a specific type of photopsia, which refers to the sensation of seeing light in the absence of actual light. Erythropsy is typically a transient phenomenon, meaning it lasts for a short period before resolving.

The exact cause of erythropsy is not fully understood, but it is most commonly reported following cataract surgery. During the procedure, the clouded lens of the eye is replaced with a clear artificial intraocular lens. After the surgery, the eye's retina and visual pathways are exposed to a much brighter and clearer image than they have been accustomed to for a long time. This sudden influx of light and clarity can overwhelm the photoreceptor cells in the retina, leading to the temporary red tint. The visual system then gradually adapts to the new lens and the improved vision, and the erythropsy usually subsides on its own within a few days or weeks.

In some instances, erythropsy might be linked to other ocular conditions or medications, but the post-cataract surgery association is the most frequently cited cause. While it can be disconcerting, erythropsy is generally not a cause for serious concern and is considered a benign side effect of regaining clear vision. If the red tint persists for an unusually long time or is accompanied by other concerning visual symptoms, consulting an ophthalmologist is recommended to rule out any other underlying issues.