Question

What is the function of the cornea?

Answer 1

Hint The cornea is the transparent front part of the eye that covers the anterior chamber, pupil, and iris. The cornea refracts the upcoming light with an anterior chamber and lens. The cornea accounts for about two-thirds of the entire optical power of the eye.

Complete answer:
- Cornea is the transparent front surface of the eye, the main focusing component. It allows light to reach the eye, much like a window. If the cornea due for some reason becomes cloudy or scarred, vision might be markedly impaired or lost. This disease is known as corneal blindness.
- Corneal transplantation is the common surgical procedure that replaces an affected corneal disc-shaped fragment with a similarly shaped portion of a healthy donor cornea.

Additional Information:
The human eye is known to be a sensory organ that responds to light and enables vision. within the retina, rod and cone cells allow the conscious perception of light and vision, including colour differentiation and depth perception.
Vision Mechanism:
Via the cornea, the eye obtains light rays and therefore the lens produces impulses within the rods and cones. Within the human eye, photosensitive compounds contain opsin (a protein) and retinal (vitamin A aldehyde).
Dissociation of the retina from opsin is caused by the light obtained and this leads to a change within the opsin structure. Due to this, membrane permeability changes end in potential differences within the photoreceptor cells and this creates a sign through the bipolar cells that generate a nerve impulse within the ganglion cells. The optic nerves transmit these impulses to the brain's visual cortex region, where neural impulses are analyzed and therefore the image created on the retina is recognized.

Note:
The refractive capacity of the cornea in humans is approximately 43 diopters. Surgical procedures such as LASIK will reshape the cornea.
 - Eye donation after his / her death is an act of donating one's eyes. This process can only help corneal blinds, not other blinds.