Anatomy of the Eye Normal Vision (Emmetropia) In the normal eye, light is focused through the cornea and lens sharply onto the retina. There the light is converted into electrical signals, which are sent to the brain through the optic nerve to enable sight. Short-Sightedness (Myopia) Short-sightedness occurs when the cornea is too steep or … Continue reading Refractive Errors Corrected By Laser Eye Surgery