The Oculomotorl Nerve HO
... The Nucleus of this nerve is located in the Mid brain at the level of Superior Colliculus. At this level, the nuclei of the two sides form a single complex that lies in the central grey matter, ventral to the cerebral aqueduct. ...
... The Nucleus of this nerve is located in the Mid brain at the level of Superior Colliculus. At this level, the nuclei of the two sides form a single complex that lies in the central grey matter, ventral to the cerebral aqueduct. ...
Examination of the Ocular Fundus - Cornell University Veterinary
... Pupil dilation is essential for evaluating the fundus in its entirety and can be easily achieved with topical mydriatic agents. The most commonly employed agents are parasympatholytic drugs such as tropicamide or atropine. These drugs paralyze the smooth muscle of the iris sphincter and allow the pu ...
... Pupil dilation is essential for evaluating the fundus in its entirety and can be easily achieved with topical mydriatic agents. The most commonly employed agents are parasympatholytic drugs such as tropicamide or atropine. These drugs paralyze the smooth muscle of the iris sphincter and allow the pu ...
Today`s Treatment For Macular Holes
... retina, similar to the photographic film itself, is a thin layer of tissue that lies against the back surface of the eye wall. The image obtained by the retina is transmitted via the optic nerve to the brain and forms the picture that we see. Unlike a camera, the image obtained by the retina is not ...
... retina, similar to the photographic film itself, is a thin layer of tissue that lies against the back surface of the eye wall. The image obtained by the retina is transmitted via the optic nerve to the brain and forms the picture that we see. Unlike a camera, the image obtained by the retina is not ...
Optic Nerve Head and Retinal Nerve Fiber Layer Imaging in
... with corresponding visual field defect. Intraocular pressure (IOP) is considered only a major risk factor and not a diagnostic criterion. At present, clinically visible RNFL defects are considered as the sensitive indicator for early diagnosis of glaucoma. Experimental studies have shown, that local ...
... with corresponding visual field defect. Intraocular pressure (IOP) is considered only a major risk factor and not a diagnostic criterion. At present, clinically visible RNFL defects are considered as the sensitive indicator for early diagnosis of glaucoma. Experimental studies have shown, that local ...
Seeing, Hearing, and Smelling the World
... surrounded by cavities. But if you turn the page upside down, all the cavities become spheres, and vice versa. In each case, the shapes seem real because “your brain assumes there is a single light source—and that this light comes from above,” says Vilayanur Ramachandran, a professor of neuroscience ...
... surrounded by cavities. But if you turn the page upside down, all the cavities become spheres, and vice versa. In each case, the shapes seem real because “your brain assumes there is a single light source—and that this light comes from above,” says Vilayanur Ramachandran, a professor of neuroscience ...
High resolution retinal imaging with a compact adaptive optics
... provide a higher transverse resolution than can be achieved absent adjustment for aberrations [1-2]. AO systems use a wavefront sensor (WS) to detect and measure ocular aberrations and a deformable mirror (DM) to manipulate the wavefront to achieve near-diffraction-limited focusing in the eye. The W ...
... provide a higher transverse resolution than can be achieved absent adjustment for aberrations [1-2]. AO systems use a wavefront sensor (WS) to detect and measure ocular aberrations and a deformable mirror (DM) to manipulate the wavefront to achieve near-diffraction-limited focusing in the eye. The W ...
ROP – A Visual Experience - Ophthalmic Photographers` Society
... ROP – A Visual Experience Key Words Retinopathy of prematurity, fundus photography, ROP stages, laser treatment Introduction/Retinal Blood Vessel Development ...
... ROP – A Visual Experience Key Words Retinopathy of prematurity, fundus photography, ROP stages, laser treatment Introduction/Retinal Blood Vessel Development ...
Disc case studies – Part 2
... the nerve and peripapillary area, known as the conus and sometimes it can extend to involve the entire inferior aspect of the nerve. There can also be moderate-tosevere thinning of the retinal pigment epithelium, choroid and the sclera and this can result in choroidal neo-vascularisation and haemorr ...
... the nerve and peripapillary area, known as the conus and sometimes it can extend to involve the entire inferior aspect of the nerve. There can also be moderate-tosevere thinning of the retinal pigment epithelium, choroid and the sclera and this can result in choroidal neo-vascularisation and haemorr ...
Retinal Detachment Model in Rodents by
... the distance between the retinal pigment epithelial (RPE) layer and photoreceptors increases . Consistent with these reports, our previous experiments showed more photoreceptor death in bullous RDs than shallow RDs. It has also been reported that subretinal hemorrhage is toxic ...
... the distance between the retinal pigment epithelial (RPE) layer and photoreceptors increases . Consistent with these reports, our previous experiments showed more photoreceptor death in bullous RDs than shallow RDs. It has also been reported that subretinal hemorrhage is toxic ...
Retinal damage in macaque after white light exposures lasting ten
... al,9 that is, anesthetized macaque monkeys and exposures restricted to small patches of retina. In addition to funduscopy, we introduced retinal densitometry as a new technique for assessing damage. This technique has the advantage of being both quantitative and noninvasive. Also, direct information ...
... al,9 that is, anesthetized macaque monkeys and exposures restricted to small patches of retina. In addition to funduscopy, we introduced retinal densitometry as a new technique for assessing damage. This technique has the advantage of being both quantitative and noninvasive. Also, direct information ...
Measurement of Retinal Nerve Fiber Layer (RNFL) Thickness in
... leading to more accurate measurements. Focal loss of tissue, which occurs more often in the earlier stages of glaucoma, may be easier to identify. Thus, spectral-domain OCT can potentially acquire a greater sensitivity for early glaucoma diagnosis. 3D images offer the possibility of moving the scan ...
... leading to more accurate measurements. Focal loss of tissue, which occurs more often in the earlier stages of glaucoma, may be easier to identify. Thus, spectral-domain OCT can potentially acquire a greater sensitivity for early glaucoma diagnosis. 3D images offer the possibility of moving the scan ...
Department of Ophthalmology
... rescue therapies that don’t address the real of the Division of Neuro-Ophthalmology at There is a risk of permanent blindness. problem, which is cells dying off due to a NYEE. “What NORDIC offers is a network This clinical trial represents the first use of lack of oxygen to the optic nerve. This dru ...
... rescue therapies that don’t address the real of the Division of Neuro-Ophthalmology at There is a risk of permanent blindness. problem, which is cells dying off due to a NYEE. “What NORDIC offers is a network This clinical trial represents the first use of lack of oxygen to the optic nerve. This dru ...
Central retinal artery occlusion as the presenting
... thrombosis due mainly to ET might have been the cause; however, this patient, who was a smoker, had prothrombin 20210A mutation heterozygosity in addition to previously undiagnosed ET, and it is likely that the combined effect of these factors might have contributed to serious carotid stenosis and s ...
... thrombosis due mainly to ET might have been the cause; however, this patient, who was a smoker, had prothrombin 20210A mutation heterozygosity in addition to previously undiagnosed ET, and it is likely that the combined effect of these factors might have contributed to serious carotid stenosis and s ...
Full Text of
... 1. Because the break within the intercalary membrane lies over depigmented tissue, laser photocoagulation, cryotherapy, and diathermy do not provide adequate chorioretinal adhesion within this region. Hence, in managing retinal detachment associated with choroidal coloboma, attempts have been direct ...
... 1. Because the break within the intercalary membrane lies over depigmented tissue, laser photocoagulation, cryotherapy, and diathermy do not provide adequate chorioretinal adhesion within this region. Hence, in managing retinal detachment associated with choroidal coloboma, attempts have been direct ...
SIDEROSIS BULBI* negative charge attracts the positively charged
... posterior uveitis does not occur unless Bruch's membrane has been penetrated. Glaucoma is a common complication and may be due either to blocking of the trabecular meshwork with macrophages or to the production of a more albuminous aqueous by the ciliary body. Loss of vision is usually due to retina ...
... posterior uveitis does not occur unless Bruch's membrane has been penetrated. Glaucoma is a common complication and may be due either to blocking of the trabecular meshwork with macrophages or to the production of a more albuminous aqueous by the ciliary body. Loss of vision is usually due to retina ...
as a PDF
... in vision in patients with ION. Alpha 2-adrenergic receptors play an important role in vascular autoregulation (Faber and Meininger, 1990; McGillivray-Anderson and Faber, 1991). Activation of alpha 2adrenergic receptors inhibits adenylate cyclase activity (Jakobs, 1979; Osborne, 1991), inhibits calc ...
... in vision in patients with ION. Alpha 2-adrenergic receptors play an important role in vascular autoregulation (Faber and Meininger, 1990; McGillivray-Anderson and Faber, 1991). Activation of alpha 2adrenergic receptors inhibits adenylate cyclase activity (Jakobs, 1979; Osborne, 1991), inhibits calc ...
Ocular fundus in neurofibromatosis type 2
... found in the slide collection both represent examples of optic disc gliomas. It has been suggested that these extremely rare tumours may be found specifically in patients with NF 2.1 This assumption was based on reports published long before the identification of NF 2 as a distinct disease.22-24 The ...
... found in the slide collection both represent examples of optic disc gliomas. It has been suggested that these extremely rare tumours may be found specifically in patients with NF 2.1 This assumption was based on reports published long before the identification of NF 2 as a distinct disease.22-24 The ...
Afferent and efferent pathways in the visual system of the freshwater
... the right one (contrary to L. stagnalis), we revealed several quite large as well as some smaller neurons, whose axons jointly formed a bundle in the parietal neuropil. Axons of these cells ascended to the left cerebral ganglion where they joined the cerebral neuropil. Some axons passed along the n. ...
... the right one (contrary to L. stagnalis), we revealed several quite large as well as some smaller neurons, whose axons jointly formed a bundle in the parietal neuropil. Axons of these cells ascended to the left cerebral ganglion where they joined the cerebral neuropil. Some axons passed along the n. ...
Sensory receptors
... Each eye is made up of the eyeball and a series of accessory structures. a) Eyeball It is a hollow spherical organ, located in a cavity in the skull called the ocular orbit (or eye socket). The eyeball walls are formed by three layers, that are, from the outside to the inside: The sclera. It is th ...
... Each eye is made up of the eyeball and a series of accessory structures. a) Eyeball It is a hollow spherical organ, located in a cavity in the skull called the ocular orbit (or eye socket). The eyeball walls are formed by three layers, that are, from the outside to the inside: The sclera. It is th ...
a7a79dd360b9190
... Retina is facing the cornea with a mesh of nerve fibers lining the back half of the eye ball. it converts light images into electrical impulses, sent to the brain by optic nerve. Near the center of the retina is a small depression which is called fovea centralis. This small part of the retina is re ...
... Retina is facing the cornea with a mesh of nerve fibers lining the back half of the eye ball. it converts light images into electrical impulses, sent to the brain by optic nerve. Near the center of the retina is a small depression which is called fovea centralis. This small part of the retina is re ...
PDF - Oftalmo.com
... involving both foveae (fig. 1). A FA study was made, evidencing the presence of slight bilateral macular edema (fig. 2). The OCT study showed a single foveal cyst with focal disruption of the photoreceptor line without increased macular thickness in RE and reduced foveal thickness in the LE (fig. 3) ...
... involving both foveae (fig. 1). A FA study was made, evidencing the presence of slight bilateral macular edema (fig. 2). The OCT study showed a single foveal cyst with focal disruption of the photoreceptor line without increased macular thickness in RE and reduced foveal thickness in the LE (fig. 3) ...
2015 May Ophthalmology - East Dorset NHS Library
... Emailed alerts are a quick and easy way of keeping up to date. We produce subject specific Current Awareness Bulletins to provide staff with information on recently published guidance and research All Current Awareness Bulletins are prepared monthly by librarians, and emailed directly to your inbox ...
... Emailed alerts are a quick and easy way of keeping up to date. We produce subject specific Current Awareness Bulletins to provide staff with information on recently published guidance and research All Current Awareness Bulletins are prepared monthly by librarians, and emailed directly to your inbox ...
ayurvedic management of branch retinal vein occlusion with
... sudden onset of painless unilateral visual field defect, metamorphopsia. Its complications are Retinal hemorrhage and chronic Cystoid macular edema (CME) leading to poor visual acuity. The patient in the study was having BRVO with retinal hemorrhage and CME. According to Ayurved, Retinal hemorrhage ...
... sudden onset of painless unilateral visual field defect, metamorphopsia. Its complications are Retinal hemorrhage and chronic Cystoid macular edema (CME) leading to poor visual acuity. The patient in the study was having BRVO with retinal hemorrhage and CME. According to Ayurved, Retinal hemorrhage ...
A Novel Vertebrate Eye Using Both Refractive and Reflective Optics
... and illuminated rods (i.e., those located toward the dorsal margin of the diverticular retina) are predicted to experience lower irradiance, with rays incident over a narrow range of angles, and therefore are potentially underfilled. The image brightness at such points will therefore be lower than f ...
... and illuminated rods (i.e., those located toward the dorsal margin of the diverticular retina) are predicted to experience lower irradiance, with rays incident over a narrow range of angles, and therefore are potentially underfilled. The image brightness at such points will therefore be lower than f ...
Retina
The retina (/ˈrɛtɪnə/ RET-i-nə, pl. retinae, /ˈrɛtiniː/; from Latin rēte, meaning ""net"") is the third and inner coat of the eye which is a light-sensitive layer of tissue. The optics of the eye create an image of the visual world on the retina (through the cornea and lens), which serves much the same function as the film in a camera. Light striking the retina initiates a cascade of chemical and electrical events that ultimately trigger nerve impulses. These are sent to various visual centres of the brain through the fibres of the optic nerve.In vertebrate embryonic development, the retina and the optic nerve originate as outgrowths of the developing brain, so the retina is considered part of the central nervous system (CNS) and is actually brain tissue. It is the only part of the CNS that can be visualized non-invasively.The retina is a layered structure with several layers of neurons interconnected by synapses. The only neurons that are directly sensitive to light are the photoreceptor cells. These are mainly of two types: the rods and cones. Rods function mainly in dim light and provide black-and-white vision, while cones support daytime vision and the perception of colour. A third, much rarer type of photoreceptor, the intrinsically photosensitive ganglion cell, is important for reflexive responses to bright daylight.Neural signals from the rods and cones undergo processing by other neurons of the retina. The output takes the form of action potentials in retinal ganglion cells whose axons form the optic nerve. Several important features of visual perception can be traced to the retinal encoding and processing of light.