Lenses work by changing the direction of light and focusing it correctly on the retina. For example, lenses correct farsightedness by converging rays of light on the retina instead of behind it, as would be the case.
Lenses work by changing the direction of light and focusing it correctly on the retina. For example, lenses correct farsightedness by converging rays of light on the retina instead of behind it, as would be the case.
