A concave lens is used to correct myopia.
1. In myopia the distance between eye lens and retina increases as eyeball is lengthened or lens is curved.
2. A concave lens causes light rays to diverge before they strike the lens of the eye.
3. The power of concave lens is so closen that it creates required divergence and hence after convergence by eye lens, the image is formed on the retina.
2. A concave lens causes light rays to diverge before they strike the lens of the eye.
3. The power of concave lens is so closen that it creates required divergence and hence after convergence by eye lens, the image is formed on the retina.