![Optical coherence tomography angiography of the optic nerve head](http://s1.studyres.com/store/data/004152627_1-3ad7fab4416648baa627dffe8a522e83-300x300.png)
Optical coherence tomography angiography of the optic nerve head
... the optic disc flow index in eyes of patients with multiple sclerosis and a history of optic neuropathy was significantly lower than the values of the control group, as well as compared patients with multiple sclerosis, but without optic neuropathy. Ghasemi Falavarjani et al. (9) reported that the p ...
... the optic disc flow index in eyes of patients with multiple sclerosis and a history of optic neuropathy was significantly lower than the values of the control group, as well as compared patients with multiple sclerosis, but without optic neuropathy. Ghasemi Falavarjani et al. (9) reported that the p ...
Crawford Eye Associates
... apparent when you look at something evenly lit, such as white paper or a blue sky, and are more obvious when you move your eyes. They are especially noticeable when looking through an optical instrument, such as a microscope or binoculars. They are more common and seem to be more annoying to people ...
... apparent when you look at something evenly lit, such as white paper or a blue sky, and are more obvious when you move your eyes. They are especially noticeable when looking through an optical instrument, such as a microscope or binoculars. They are more common and seem to be more annoying to people ...
eye cases how
... History of previous ocular disease • Childhood squint- lazy eye • Blunt injury- traumatic mydriasis ( could be confused with partial third nerve palsy) ...
... History of previous ocular disease • Childhood squint- lazy eye • Blunt injury- traumatic mydriasis ( could be confused with partial third nerve palsy) ...
Effect of wavelength on in vivo images of the human cone mosaic
... In addition to the spectral signatures of different pigments in the fundus, the distribution of the returning light in the pupil plane contains information about the relative contribution of different layers to the fundus reflectance.9–14 The light that enters the receptors and remains confined in t ...
... In addition to the spectral signatures of different pigments in the fundus, the distribution of the returning light in the pupil plane contains information about the relative contribution of different layers to the fundus reflectance.9–14 The light that enters the receptors and remains confined in t ...
Strabismus is a disease characterizing by the eyes misalignment. It
... Development of binocular vision starts at the child birth. Both photoreceptor organ of the eye and vision are changing. In children, size and shape of the eyeball differ from the adult eye. Retina and its nervous elements, especially cones in the macular area, are not fully developed. Peripheral tem ...
... Development of binocular vision starts at the child birth. Both photoreceptor organ of the eye and vision are changing. In children, size and shape of the eyeball differ from the adult eye. Retina and its nervous elements, especially cones in the macular area, are not fully developed. Peripheral tem ...
Incontinentia pigmenti (Bloch-Sulzberger syndrome)
... the retina was completely avascular. One can assume that the temporal retina had failed to develop, producing areas of capillary non-perfusion with preretinal fibrosis. Contraction of this preretinal fibrotic tissue results in retinal detachment and multiple convoluted infoldings of the retina resem ...
... the retina was completely avascular. One can assume that the temporal retina had failed to develop, producing areas of capillary non-perfusion with preretinal fibrosis. Contraction of this preretinal fibrotic tissue results in retinal detachment and multiple convoluted infoldings of the retina resem ...
acute visual loss
... Loss of vision is usually considered acute if it develops within a few minutes to a couple of days. ...
... Loss of vision is usually considered acute if it develops within a few minutes to a couple of days. ...
A mathematical description of nerve fiber bundle trajectories
... around the optic disc and to estimate local RNFL thickness, was not achieved. Weber and Ulrich (1991) developed a RNFB map based on scotoma borders in RNFB defects. This map showed an about similar pattern as our model but was less complete and fine. Garway-Heath et al. (2000) estimated the correspo ...
... around the optic disc and to estimate local RNFL thickness, was not achieved. Weber and Ulrich (1991) developed a RNFB map based on scotoma borders in RNFB defects. This map showed an about similar pattern as our model but was less complete and fine. Garway-Heath et al. (2000) estimated the correspo ...
Retinal nerve fiber layer analysis in idiopathic intracranial
... for the nerve fiber layer measurement could be shown better than that of perimetry, it may be the preferred way to follow them for deciding on intervention even when field loss and thinning is well established. However in patients without or with mild visual improvement like our study group, RNFL an ...
... for the nerve fiber layer measurement could be shown better than that of perimetry, it may be the preferred way to follow them for deciding on intervention even when field loss and thinning is well established. However in patients without or with mild visual improvement like our study group, RNFL an ...
Prof. Colin Willoughby
... provides modern facilities for the treatment of general and specialist adult ophthalmological diseases based around nine inpatient beds and a dedicated ophthalmic day ward, together with a four theatre dedicated operating department. Three theatres are equipped for posterior segment and vitreoretina ...
... provides modern facilities for the treatment of general and specialist adult ophthalmological diseases based around nine inpatient beds and a dedicated ophthalmic day ward, together with a four theatre dedicated operating department. Three theatres are equipped for posterior segment and vitreoretina ...
Ophthalmology for Primary Physicians
... ++high prevalence of diabetes is seen in Native American Indians and Alaskan Natives, with a prevalence rate of approximately 9% and a 46% increase in prevalence among those under age 35 years ...
... ++high prevalence of diabetes is seen in Native American Indians and Alaskan Natives, with a prevalence rate of approximately 9% and a 46% increase in prevalence among those under age 35 years ...
Hollenhorst Plaques
... Although some studies have identified value in prognostication, others have suggested that the results of carotid artery auscultation have neither high specificity nor sensitivity, particularly in asymptomatic patients.9 Evidence suggests that both symptomatic and asymptomatic Hollenhorst plaques ma ...
... Although some studies have identified value in prognostication, others have suggested that the results of carotid artery auscultation have neither high specificity nor sensitivity, particularly in asymptomatic patients.9 Evidence suggests that both symptomatic and asymptomatic Hollenhorst plaques ma ...
Medical design template
... • AV nicking (”Gunn sign”) • Associated with hypertension • Pathological arterial circulation impedes venous flow at their intersection ...
... • AV nicking (”Gunn sign”) • Associated with hypertension • Pathological arterial circulation impedes venous flow at their intersection ...
10 1 Fla Ophth imaging
... Glaucoma is a disease characterized by degeneration of the optic disc. Elevated intraocular pressure has long been thought to be the primary etiology, but the relationship between intraocular pressure and optic nerve damage varies among patients, suggesting a multifactorial origin. For example, some ...
... Glaucoma is a disease characterized by degeneration of the optic disc. Elevated intraocular pressure has long been thought to be the primary etiology, but the relationship between intraocular pressure and optic nerve damage varies among patients, suggesting a multifactorial origin. For example, some ...
Lecture 3
... The focused interview for assessment of the eye includes data about the structures of the internal and external eye and vision. Information in the focused interview is considered in relation to norms and expectations about the functions and structures of the eye. Equipment for physical assessment of ...
... The focused interview for assessment of the eye includes data about the structures of the internal and external eye and vision. Information in the focused interview is considered in relation to norms and expectations about the functions and structures of the eye. Equipment for physical assessment of ...
NEURO-OPHTHALMOLOGY: EXAMINATION AND INVESTIGATION
... Visual acuity It is important to assess both distance vision and near vision, as these can be affected independently by various processes, and clearly have different implications for visual disability and therefore for appropriate treatment. By far the most widely used tool for measuring distance vi ...
... Visual acuity It is important to assess both distance vision and near vision, as these can be affected independently by various processes, and clearly have different implications for visual disability and therefore for appropriate treatment. By far the most widely used tool for measuring distance vi ...
A Model of the Human Eye - Kansas State University
... focused. Also, the defects of near and farsighted eyes can be demonstrated. A commercial product is available for demonstrating the optics of the eye.1 This model is based on the Ingersoll Eye Model, which was sold by Cenco and is apparently no longer available. However, this model does not have the ...
... focused. Also, the defects of near and farsighted eyes can be demonstrated. A commercial product is available for demonstrating the optics of the eye.1 This model is based on the Ingersoll Eye Model, which was sold by Cenco and is apparently no longer available. However, this model does not have the ...
My Edited Definitions
... A common symptom of glaucoma is high intraocular pressure. However, this can only be detected at an optometry clinic. Another warning sign is gradual vision loss, but other than the two mentioned symptoms there are no other changes or discomfort that can be noticed by a patient (Quigley, 2011). Diag ...
... A common symptom of glaucoma is high intraocular pressure. However, this can only be detected at an optometry clinic. Another warning sign is gradual vision loss, but other than the two mentioned symptoms there are no other changes or discomfort that can be noticed by a patient (Quigley, 2011). Diag ...
Vitreous And Peripheral Retinal Conditions
... A common larger sized floater is caused by the ring of glial tissue that surrounds the optic nerve and which can come away as a PVD occurs. Such a floater can appear as a ring and is known as a Weiss’s ring. Floaters are usually produced by vitreous shrinkage (syneresis), fibrillar degeneration or p ...
... A common larger sized floater is caused by the ring of glial tissue that surrounds the optic nerve and which can come away as a PVD occurs. Such a floater can appear as a ring and is known as a Weiss’s ring. Floaters are usually produced by vitreous shrinkage (syneresis), fibrillar degeneration or p ...
vision - Global Anatomy Home Page
... sees well and where it does not. We need a system of stimulus/response mechanism so that the exact same stimulus can be presented to various parts of the visual field and the patient can respond when the stimulus is seen. We also need a method of varying the stimulus intensity in order to map the va ...
... sees well and where it does not. We need a system of stimulus/response mechanism so that the exact same stimulus can be presented to various parts of the visual field and the patient can respond when the stimulus is seen. We also need a method of varying the stimulus intensity in order to map the va ...
The Senses - Union County College
... – innermost layer of tissue which contains 2 kinds of photoreceptors (light sensitive receptors) • RODS sensitive to low levels of light (night time vision) – Allow us to see in black and white • CONES require high levels of light – come in 3 varieties (red, green and blue) so we can see in color Le ...
... – innermost layer of tissue which contains 2 kinds of photoreceptors (light sensitive receptors) • RODS sensitive to low levels of light (night time vision) – Allow us to see in black and white • CONES require high levels of light – come in 3 varieties (red, green and blue) so we can see in color Le ...
Treatment
... Enucleation may be necessary for tumors associated with intractable,painful glaucoma ...
... Enucleation may be necessary for tumors associated with intractable,painful glaucoma ...
Pathophysiology.of.retinal.vein.occlusion
... VEGF production. VEGF is produced by the retina from retinal pigment epithelial cells, endothelial cells, and Muller cells, as well as other types of ocular tissue.22 Boyd et al found a close correlation between aqueous VEGF levels and the course of iris neovascularization and vascular permeability ...
... VEGF production. VEGF is produced by the retina from retinal pigment epithelial cells, endothelial cells, and Muller cells, as well as other types of ocular tissue.22 Boyd et al found a close correlation between aqueous VEGF levels and the course of iris neovascularization and vascular permeability ...
anatomy and physiology
... aqueous flow but are difficult to study. The purpose of the current report is to describe new techniques to permit study of the transparent tubes. Viscoelastic dilation of SC provides a light path that permits use of new non-destructive techniques involving the dissecting microscope, phase contrast ...
... aqueous flow but are difficult to study. The purpose of the current report is to describe new techniques to permit study of the transparent tubes. Viscoelastic dilation of SC provides a light path that permits use of new non-destructive techniques involving the dissecting microscope, phase contrast ...
Uveitis The uvea is the middle layer in the eye sandwiched between
... The uvea is the middle layer in the eye sandwiched between the retina (innermost layer) and the sclera (outermost layer). The uvea contains many blood vessels that carry blood to and from the eye. Uveitis is inflammation of the uvea. Since the uvea nourishes many important parts of the eye, uveitis ...
... The uvea is the middle layer in the eye sandwiched between the retina (innermost layer) and the sclera (outermost layer). The uvea contains many blood vessels that carry blood to and from the eye. Uveitis is inflammation of the uvea. Since the uvea nourishes many important parts of the eye, uveitis ...
Retina
![](https://commons.wikimedia.org/wiki/Special:FilePath/Human_eye_cross-sectional_view_grayscale.png?width=300)
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.