How Solar Eclipse Light Damages the Retina
Looking directly at the sun, even briefly, floods the retina with intense visible and infrared light. This energy heats and burns delicate photoreceptor cells, creating a small blind spot called a solar retinopathy.
Why the Eye Focuses and Amplifies the Damage
The lens focuses sunlight onto a tiny area at the back of the eye, similar to using a magnifying glass. Because the pupil dilates in dim conditions, more light enters, increasing the risk of thermal and photochemical injury.
How to Protect Your Vision During an Eclipse
Use only ISO 12312-2 certified eclipse glasses or handheld solar viewers. Inspect them for damage before use, and never look through unfiltered cameras, telescopes, or binoculars. For safe viewing guidance, visit https://www.nasa.gov/topics/solar-system/eclipse-safety.
