Why are Tears Important to the Cornea?
Houston Wave Contact Lenses
Every time we blink, tears are distributed across the cornea to keep the eye moist, help wounds heal, and protect against infection. Tears form in three layers:
1.-An outer, oily (lipid) layer that keeps tears from evaporating too quickly and helps tears remain on the eye.
2.-A middle (aqueous) layer that nourishes the cornea and the conjunctiva the mucous membrane that covers the front of the eye and the inside of the eyelids.
3.-A bottom (mucin) layer that helps spread the aqueous layer across the eye to ensure that the eye remains wet.
What does the cornea do?
The cornea acts as a barrier against dirt, germs, and other particles that can harm the eye. The cornea shares this protective task with the eyelids and eye sockets, tears, and the sclera (white part of the eye). The cornea also plays a key role in vision by helping focus the light that comes into the eye. The cornea is responsible for 65-75 percent of the eye’s total focusing power.
The cornea and lens of the eye are built to focus light on the retina, which is the light-sensitive tissue at the back of the eye. When light strikes the cornea, it bends or refracts the incoming light onto the lens. The lens refocuses that light onto the retina, which starts the translation of light into vision. The retina converts light into electrical impulses that travel through the optic nerve to the brain, which interprets them as images.
The refractive process the eye uses is similar to the way a camera takes a picture. The cornea and lens in the eye act as the camera lens. The retina is like the film (in older cameras), or the image sensor (in digital cameras). If the image is not focused properly, the retina makes a blurry image.
The cornea also serves as a filter that screens out damaging ultraviolet (UV) light from the sun. Without this protection, the lens and the retina would be exposed to injury from UV rays.
Houston Wave Contact Lenses.
Orthokeratology Doctor in Houston, Pediatric Optometrist in Houston, Pediatric Eye Clinic, Pedro Gomez OD, Pediatric Optometry in Houston, Ortho-K Doctor in Houston, Orthokeratology Doctor in Houston, Non Surgical Corneal Molding Doctor in Houston, Non-Surgical Vision Correction Doctor in Houston, Ortho-K Specialized in Houston, Orthokeratology Specialized in Houston, Non Surgical Corneal Molding Specialized in Houston, Non-Surgical Vision Correction Specialized in Houston, Keratoconus Therapy in Houston, Keratoconus Doctor in Houston, Keratoconus Specialized in Houston, Wave Contact Lenses in Houston, Eye Conditions Therapy in Houston, Amblyopia Therapy in Houston, Conjunctivitis Therapy in Houston, Strabismus treatment in Houston, Dry Eye treatment in Houston.