Retina Nerve Supply

RPE cell is a hexagonal shaped cuboidal cell situated behind the photoreceptors. The retina has a dual vascular supply that is similar between the two species.

The Visual Pathway Optometry Vision Eye Neuro

Outer 4 layers of retina is supplied by till outer nuclear layer choriocapillaries.

Retina nerve supply. The trochlear and abducent nerves pass directly to the single muscle supplied by each nerve. This fundus photograph shows the normal appearance of the retina. The retinal arterioles were supplied by the choroidoretinal arteries which coursed rostrally in the external sheath of the optic nerve and perforated the area cribrosa of the sclera.

Nerve-Supply to the Eye All these muscles are supplied by the third nerve except the superior oblique which is supplied by the fourth and the external rectus which is supplied by the sixth. 7 We previously demonstrated that AO-SLO captures images of individual retinal nerve fiber bundles in normal eyes and eyes of patients with glaucoma 8 9 and showed that nerve fiber bundle width changed in. The inner six layers gets its supply from central retinal artery which is a branch of ophthalmic artery.

The nerves of the orbit include those that enter through the superior orbital fissure and supply the ocular muscles. Oculomotor CN III Trochlear CN IV and Abducent CN VI nerves. The outer one-third of the retina is supplied by the choriocapillaris described previously.

The dorsal choroidoretinal artery arose variably from the external ophthalmic artery and its terminal branches. Schematic representation of blood supply of the optic nerve head Reproduced from Hayreh 15. Knowledge of the pathway of the optic nerve from the eye to the brain is important because the origin of different diseases that affect vision can be localized based upon the location of the.

Your retina requires a constant supply of blood to make sure your cells get enough nutrients and oxygen. The uveal circulation consists of arteries entering the globe outside the optic nerve these supply the uvea and outer and middle layers of the retina. This page describes normal retinal anatomy.

Retinal nerve fiber layer From Wikipedia the free encyclopedia Redirected from Nerve fiber layer The retinal nerve fiber layer RNFL or nerve fiber layer stratum opticum is formed by the expansion of the fibers of the optic nerve. The central retinal arterya branch of the ophthalmic arteryand its branches supply the anterior two-thirds of the neurosensory retina. The blood supply of the optic nerve is complex but is mainly provided by the posterior ciliary artery which is a branch of the internal carotid artery.

The outer plexiform layer gets partly by both the above arteries. BLOOD SUPPLY OF THE RETINA. It is thickest near the optic disc gradually diminishing toward the ora serrata.

Refer to this page for comparison with the retinal disease pages. Upon entering the nerve fiber layer of the retina the central retinal artery divides into two branches. The superior branch and the inferior branch.

C choroid CRA central retinal artery LC lamina cribrosa NFL surface nerve fiber layer of the disc ON optic nerve P pia PCA posterior ciliary artery PLR prelaminar region R retina RA retinal arteriole S sclera Fig. The red curving structures are blood vessels which enter the retina through the nerve. Blood also removes the waste your retina produces.

Retinal Pigment Epithelial Cells RPE cells. The optic nerve feeds in the posterior surface of the eye and carries all visual information from the retina ultimately to the primary orbital cortex which lies within the depths of the calcarine sulcus on the occipital lobe of the brain. Because of this counter-intuitive arrangement light must first pass through and around the ganglion cells and through the thickness of the retina.

The retinal circulation on the other hand supplies the inner layer of the retina and passes with the optic nerve as a branch of the ophthalmic artery called the central artery of the retina. Superioris and indirectly the iris and ciliary muscle of the eyeball through the ciliary ganglion. The whitish circle is the nerve that connects the retina to the brain.

The optic nerve carries the ganglion cell axons to the brain and the blood vessels that supply the retina. Throughout the retina the major blood vessels of the retinal vasculature supply the capillaries that run into the neural tissue. The third nerve also supplies the levator palpebra.

Capillaries are found running through all parts of the retina from the nerve fibre layer to the outer plexiform layer and even occasionally as high as in the outer nuclear layer. It is possible to compensate for these aberrations by using imaging systems that incorporate adaptive optics AO consisting of a wavefront sensor that measures aberrations in ocular optics and a deformable mirror or spatial light modulator to compensate for aberrations in living eyes. The central retinal artery has 4 main branches.

The inner retina is supplied by the CRA which receives 20-30 of the total ocular blood flow and enters the eye at the optic nerve head where it divides into two major branches. These branches in turn divide into arterioles superior inferior nasal and temporal which extend away from the optic disc to supply separate areas of the retina figure 1. The inner retina is supplied by the central retinal artery the branch of the ophthalmic artery that enters the optic nerve 4 mm posterior to the eye.

Meaning that the central retinal artery nourishes all the retina except for the photoreceptor layer this is supplied by choriocapillaris from the choroid. The ganglion cells lie innermost in the eye while the photoreceptive cells lie beyond. RPE cells are connected with each other along their sides and form a single layer that lies between Bruchs membrane and the neurosensory retina.

There are two circulations both supplied by the ophthalmic artery.

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