Infrared rays causes

Infrared rays affect primarily the retina, because of the transparency of the ocular media.When directly viewing a point source or laser beam, the focusing propeies in the IRA region additionally render the retina much more susceptible to damage than any other pa of the body.For sho exposure periods, heating of the iris from the absorption of visible or near infrared is considered to play a role in the development of opacities in the lens.