B. B. Patil, T. Dowd
Dec 1, 2000
Current Anaesthesia & Critical Care
Abstract The eye enables one to see the outside world whilst two eyes provide stereoscopic vision. There is a tear film that keeps the anterior surface of the eye moist and clear, while the intraocular pressure maintains the shape of the eye. This shape is essential for the normal optics of the eye. The extraocular muscles keep the visual images in alignment. The cornea and lens refract the light, and pupil size regulates the amount of light entering the eye, whilst the vitreous provides a clear optical media. The light falling on the retina is converted into neural impulses, which travel along the visual pathway into the visual areas of the cerebral cortex.