Aqueous is a thin, watery fluid located in the anterior and posterior chambers of the eye. The anterior chamber lies between the iris colored part of the eye and the inner surface of the cornea the front of the eye. The posterior chamber is located behind the iris and in front of the lens. In addition to supporting the shape of this area, aqueous supplies nutrients and nourishment to parts of the eye that lack blood supply.
It also removes waste. Improper drainage of the aqueous humor can cause an increase in intraocular pressure pressure inside the eye.
This increase can result in loss of vision or contribute to the development of glaucoma. Issues with aqueous humor drainage can be treated surgically. The lumbar vertebrae are the largest movable bones of the backbone.
Their large size and bone strength is necessary because these vertebrae support…. Light passes through the cornea and the pupil at the front of the eye and is focused by the lens onto the retina at the back of the eye. The cornea and lens bend light so it passes through the vitreous gel in the back chamber of the eye and is projected onto the retina.
The retina converts light to electrical impulses. The optic nerve carries these electrical impulses to the brain, which converts them into the visual images that you see. Author: Healthwise Staff. This information does not replace the advice of a doctor. Healthwise, Incorporated, disclaims any warranty or liability for your use of this information. Your use of this information means that you agree to the Terms of Use.
Learn how we develop our content. To learn more about Healthwise, visit Healthwise. Healthwise, Healthwise for every health decision, and the Healthwise logo are trademarks of Healthwise, Incorporated. Updated visitor guidelines. You are here Home » Eye Anatomy and Function. Ophthalmologists and scientists believe that one particular part of the trabecular meshwork is the site of greatest resistance to aqueous humor outflow.
If there is higher outflow resistance, then the eye pressure gradually increases. View Video. View a transcript of the video. One may wonder why the risk for glaucoma increases with age. One explanation is that with increasing age, we lose trabecular cells, which have a role in keeping the trabecular meshwork functioning well.
One may also ask the opposite question: why are some babies born with congenital glaucoma? In this case, there may be abnormal development of the trabecular meshwork, such that it does not function properly. How do glaucoma treatments affect the trabecular meshwork? In addition, these drugs directly target the diseased trabecular meshwork! The lens inside our eye focuses this light onto the back of the eye, which is called the retina.
The optic disc is the area on the retina where all the nerve fibers come together to become the optic nerve as it leaves the eye to connect to the brain. The front part of the eye is filled with a clear fluid called aqueous humor made by the ciliary body. The fluid flows out through the pupil.
Proper drainage helps keep eye pressure at a normal level and is an active, continuous process that is needed for the health of the eye. You have millions of nerve fibers that run from your retina to form the optic nerve.
These fibers meet at the optic disc. As the fluid builds up, it causes pressure to build inside the eye, which can damage these sensitive nerve fibers and result in vision loss. As the fibers are damaged and lost, the optic disc begins to hollow and develops a cupped shape.
Doctors can identify this cupping shape in their examinations. If the pressure remains too high for too long, the extra pressure on the sensitive optic disc can lead to permanent vision loss. Although high IOP is clearly a risk factor for glaucoma, we know that other factors also are involved because people with IOP in the normal range can experience vision loss from glaucoma.
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