Myopia
Myopia is a problem of eyeside. Its also called short sight . In which eyeball become elongate, such person are unable to distant objects clearly. The image of a distant object is formed in fornt of retian. This problem can b correct by using concave lens.
Hypermetropia
Hypermetropia is a problem of eyeside. Its also called long Sight. In which eyeball become short, such person are unable to distant objects clearly. The image of a distant object is formed in back of retian.This problem can b correct by using canvax lens.
Educationspot. School.Blog 