Your eyes provide 30% of the input to the brain while you’re awake. Below is a quick review on basic anatomy.
In the diagram below, light is coming into the schematic eye from right to left.
Image Credit: National Eye Institute, National Institutes of Health
Light passes through the clear cornea, where 2/3 of the focusing (or “refractive”) power of the eye exists, then into the pupil, then through the lens, where the other 1/3 of the focusing power of the eye is. The light travels through the vitreous gel, before it illuminates the retina, which contains the light sensing elements, or photoreceptors, the rods and cones.
The bulls-eye, or central part of the retina is the macula, and its center, the fovea. This is some of the hardest-working tissue in the body. Impulses of light gathered here are collected, are initially processed in the retina, and then sent along via the optic nerve on to the brain.
Two muscles of the eye, of which there is a total of six, are seen coming off the wall of the eye, above and below. You can think of the main function of the whole movement system of the eye as keeping the incoming light on the macula!
Our brain then takes the pulses and creates the images we see.
Triangle Eye Physicians is an ophthalmology practice in Raleigh, NC. Our physicians are board certified as well as subspecialty graduates of anterior segment fellowhips.
We evaluate and treat ocular surface problems, cataract, glaucoma, and diabetic eye disease. We have a specialty clinic for dry eye. We have extensive experience in consultative cataract eye surgery, premium lens implants, and refractive surgery, including LASIK and PRK. To schedule an exam or a LASIK consultation, please call 919-256-2500 or fill out our online contact form.