Normally, the eye creates a clear image because the cornea and lens bend (refract) incoming light rays to focus them on the retina. The shape of the cornea is fixed, but the lens changes shape to focus on objects at various distances from the eye. The shape of the eyeball further helps to create a clear image on the retina.
People who are farsighted (hyperopic) have trouble seeing anything close. People who are nearsighted (myopic) have trouble focusing on distant objects.
- corrective lenses (eyeglasses, or contact lenses)
- laser surgery
Take care of your sight - have regular eye examinations.