NERVE AND BLOOD SUPPLY OF THE CHOROID

 The choroid is a layer of tissue located in the back of the eye that is essential for the proper functioning of the retina. It is richly supplied with both nerves and blood vessels, which are critical for maintaining the health and function of the choroid and the retina. In this article, we will discuss the nerve and blood supply of the choroid in detail.

Nerve Supply of the Choroid

The choroid is supplied with nerves by the sympathetic and parasympathetic nervous systems. The sympathetic nervous system, which is responsible for the body's "fight or flight" response, supplies the choroid with nerves that dilate the blood vessels. This increases blood flow to the choroid and helps to maintain the health and function of the retina.

The parasympathetic nervous system, on the other hand, supplies the choroid with nerves that constrict the blood vessels. This decreases blood flow to the choroid and helps to maintain the homeostasis of the retina.

Both the sympathetic and parasympathetic nervous systems play important roles in maintaining the health and function of the choroid. The sympathetic nervous system helps to increase blood flow to the choroid and the parasympathetic nervous system helps to decrease blood flow to the choroid.

Blood Supply of the Choroid

The choroid is supplied with blood by the posterior ciliary artery and the choroidal artery. The posterior ciliary artery supplies the choroid with blood from the ophthalmic artery, which is a branch of the internal carotid artery. The choroidal artery supplies the choroid with blood from the ophthalmic artery.

The blood supplied to the choroid is rich in oxygen and nutrients, which are essential for maintaining the health and function of the retina. The blood vessels in the choroid also help to remove waste products and carbon dioxide from the retina.

In cases of hypertension or diseases such as diabetes, the blood vessels in the choroid can be damaged, leading to a decrease in blood flow to the retina. This can result in the development of retinopathies such as age-related macular degeneration and diabetic retinopathy.

Conclusion

The choroid is a vital layer of tissue located in the back of the eye that is essential for the proper functioning of the retina. It is richly supplied with both nerves and blood vessels, which are critical for maintaining the health and function of the choroid and the retina. The sympathetic and parasympathetic nervous systems supply the choroid with nerves that help to regulate blood flow to the choroid and the posterior ciliary artery and choroidal artery supply the choroid with blood that is rich in oxygen and nutrients. In cases of hypertension or diseases such as diabetes, the blood vessels in the choroid can be damaged, leading to a decrease in blood flow to the retina and the development of retinopathies.

Comments

Post a Comment

Popular posts from this blog

What is myopia?

Image
Myopia is nearsightedness and this condition of eye occurs when the power of eye is increased from the normal powers of eye. The normal powers of eye is 58DS and the eye with >58DS eye power will be marked as myopic eye.  Definition   When parallel light rays coming from the infinity focus Infront of the retina while the accommodation should be at rest this condition of eye is known as myopia.
Read more

Scleritis

Scleritis 👌is a painful inflammation (swelling) the sclera. The tough, fibrous tissues of the sclera form a protective outer layer for the eye and make up 83 percent of the eye’s surface. In almost half of all cases, scleritis is associated with an underlying autoimmune disorder such as rheumatoid arthritis. There are two main types of scleritis: anterior and posterior. Anterior scleritis, the most common type, affects the front portion of the sclera. There are three types of anterior scleritis: Diffuse scleritis is the most common type and fortunately the most treatable. This type displays widespread redness and inflammation throughout the whole or a portion of the front portion of the sclera.     Nodular scleritis, is characterized by the presence of nodules , often tender to the touch, on the surface of the eye.     Necrotizing scleritis is the most severe form of anterior scleritis. It has the ability to destroy scleral tissues an...
Read more

ABETALIPOPROTEINEMIA (BASSEN-KORNZWEIG SYNDROME) Retinopathy

Image
Abetalipoproteinemia, also known as Bassen-Kornzweig syndrome, is a rare genetic disorder that affects the body's ability to absorb and transport fats and fat-soluble vitamins. One of the ways that abetalipoproteinemia can affect the eyes is by causing retinitis pigmentosa, a condition that causes vision loss. Retinitis pigmentosa is a degenerative eye disease that affects the retina (the light-sensitive layer at the back of the eye). It is characterized by the gradual loss of photoreceptor cells (cells that detect light and send signals to the brain) and the accumulation of pigment in the retina. This can cause vision loss and may lead to blindness in severe cases. Abetalipoproteinemia can also cause optic atrophy, a condition in which the optic nerve (the nerve that carries visual information from the eye to the brain) becomes thin and weak. This can cause vision loss and other visual problems. In conclusion, abetalipoproteinemia can affect the eyes by causing reti...
Read more