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Grand Rounds - University of Louisville Ophthalmology
... Ancillary testing may be useful in ruling out other potential causes of leukocoria in children. FA, CT, MRI, U/S ...
... Ancillary testing may be useful in ruling out other potential causes of leukocoria in children. FA, CT, MRI, U/S ...
chronic headache-digital fundus changes in emmetropic teenage
... photography and by slit lamp fundus examination. 500 cases of headache with 13 to 38 years of age who have no refractive error are studied. Nidek Afc 210 auto focus and auto tracking digital fundus camera was used for taking fundus photographs and Nidek slit lamp with 135D mainster wide field lens o ...
... photography and by slit lamp fundus examination. 500 cases of headache with 13 to 38 years of age who have no refractive error are studied. Nidek Afc 210 auto focus and auto tracking digital fundus camera was used for taking fundus photographs and Nidek slit lamp with 135D mainster wide field lens o ...
VIEW PDF - Retina Today
... Identifying the target tissue on OCT is difficult without surgical microscope integration; in fact, patients undergoing vitreoretinal surgery are usually unable to collaborate by fixating due to sedation and/or local or general anesthesia. Thus, it is crucial to perform OCT with a handsfree techniqu ...
... Identifying the target tissue on OCT is difficult without surgical microscope integration; in fact, patients undergoing vitreoretinal surgery are usually unable to collaborate by fixating due to sedation and/or local or general anesthesia. Thus, it is crucial to perform OCT with a handsfree techniqu ...
Dynamic visual acuity
... • Eye dominance and motor performance – Unilaterals are superior to crossed-laterals in several motor tasks – However, crossed-laterals may have an advantage in baseball batting • A right handed batter with left-eye dominance • Dominant eye is closer to the pitcher ...
... • Eye dominance and motor performance – Unilaterals are superior to crossed-laterals in several motor tasks – However, crossed-laterals may have an advantage in baseball batting • A right handed batter with left-eye dominance • Dominant eye is closer to the pitcher ...
IOSR Journal of Dental and Medical Sciences (IOSR-JDMS)
... Eyeand a minimum IOP of 18 mm Hg(Right Eye) and19 mm Hg (Left Eye).His posterior segment evaluation showed a normal optic disc with multiple patches of myelinated nerve fibres distributed in the superior and inferior nasal quadrants of varying sizes with normal temporal retina(Fig-2 Right Eye,Fig-3 ...
... Eyeand a minimum IOP of 18 mm Hg(Right Eye) and19 mm Hg (Left Eye).His posterior segment evaluation showed a normal optic disc with multiple patches of myelinated nerve fibres distributed in the superior and inferior nasal quadrants of varying sizes with normal temporal retina(Fig-2 Right Eye,Fig-3 ...
Computed Tomography of Ocular Colobomas
... posterior globe and adjacent optic nerve are involved most often . The shape of the globe or optic nerve colobomas is related to the extent of the retinal eversion. Mild retinal eversion causes focal bulging of the globe or nerve as in case 2 (fig . 2). More extensive eversion (fig. 4C) causes the g ...
... posterior globe and adjacent optic nerve are involved most often . The shape of the globe or optic nerve colobomas is related to the extent of the retinal eversion. Mild retinal eversion causes focal bulging of the globe or nerve as in case 2 (fig . 2). More extensive eversion (fig. 4C) causes the g ...
Generation of an Inbred Miniature Pig Model of Retinitis Pigmentosa
... etinitis pigmentosa (RP) is the most frequent cause of hereditary visual loss among adults. It is a group of inherited retinal diseases characterized by the onset of night blindness, the early loss of the peripheral visual field, and the late loss of central vision.1 Recently, important therapeutic ...
... etinitis pigmentosa (RP) is the most frequent cause of hereditary visual loss among adults. It is a group of inherited retinal diseases characterized by the onset of night blindness, the early loss of the peripheral visual field, and the late loss of central vision.1 Recently, important therapeutic ...
Posterior scleritis with retinal vasculitis and choroidal and retinal
... has been attributed to several factors, inccluding interruption of the anterior ciliary a rteries, damage to the long posterior ciliary arteriies, and compression of vortex veins reducing uvead blood flow.2 In our case there was no encircling e lement placed around the eye and no interferen ce with ...
... has been attributed to several factors, inccluding interruption of the anterior ciliary a rteries, damage to the long posterior ciliary arteriies, and compression of vortex veins reducing uvead blood flow.2 In our case there was no encircling e lement placed around the eye and no interferen ce with ...
Vision Loss
... – With the patient looking at your nose, ask if your nose and other facial features are seen clearly • Inability to clearly see your: Nose => central scotoma Eyes or lips => paracentral scotoma Ears => peripheral visual field defect ...
... – With the patient looking at your nose, ask if your nose and other facial features are seen clearly • Inability to clearly see your: Nose => central scotoma Eyes or lips => paracentral scotoma Ears => peripheral visual field defect ...
Retinal imaging using adaptive optics technology
... tissue loss in the macula or development of subfoveal choroidal neovascular membranes.23 While the changes in late stages of AMD are known, there is interest to image, characterize and monitor very early stages of the disease. The idea is to be able to measure disease burden, such as lipofuscin or d ...
... tissue loss in the macula or development of subfoveal choroidal neovascular membranes.23 While the changes in late stages of AMD are known, there is interest to image, characterize and monitor very early stages of the disease. The idea is to be able to measure disease burden, such as lipofuscin or d ...
Section V – Special Senses: Eyes and Ears
... visual field random eye movements head of bed history history and physical out of bed as needed within normal limits within functional limits ...
... visual field random eye movements head of bed history history and physical out of bed as needed within normal limits within functional limits ...
Darcy Sczepanik
... is linked to hypertension 60 percent of the time. BRVOs are primarily nonischemic events (resulting in <5 disc diameters of capillary non-perfusion) twothirds of time. As a result, BRVO rarely leads to neovascularization (22% to 36%), but is often associated with macular edema (50%), particularly in ...
... is linked to hypertension 60 percent of the time. BRVOs are primarily nonischemic events (resulting in <5 disc diameters of capillary non-perfusion) twothirds of time. As a result, BRVO rarely leads to neovascularization (22% to 36%), but is often associated with macular edema (50%), particularly in ...
Vitreous base avulsion
... differences in their elasticity. Only a single case has been reported where spontaneous vitreous base avulsion occurred in a patient with neurofibromatosis.1 Vitreous base avulsion may be associated ...
... differences in their elasticity. Only a single case has been reported where spontaneous vitreous base avulsion occurred in a patient with neurofibromatosis.1 Vitreous base avulsion may be associated ...
Miscellaneous Peripheral Retinal Disease
... Choroidal Nevus Benign melanocytic tumor of the posterior uvea. A choroidal tumor consisting of atypical but benign melanocytes. This is the most common intraocular tumor encountered in clinical practice. However, do not use the word tumor when discussing nevi with patients. Ranges from 1-2% in ...
... Choroidal Nevus Benign melanocytic tumor of the posterior uvea. A choroidal tumor consisting of atypical but benign melanocytes. This is the most common intraocular tumor encountered in clinical practice. However, do not use the word tumor when discussing nevi with patients. Ranges from 1-2% in ...
the special senses
... Lecture Material is adapted from © 2013 Pearson Education, Inc. Human Anatomy and Physiology ...
... Lecture Material is adapted from © 2013 Pearson Education, Inc. Human Anatomy and Physiology ...
Paper
... disease. The unique perspective offered by retinal vascular image analysis is used by an increasing number of researchers and research groups to address scientific questions that are difficult to answer through other means. A key question in cardiovascular physiology is whether changes detected in t ...
... disease. The unique perspective offered by retinal vascular image analysis is used by an increasing number of researchers and research groups to address scientific questions that are difficult to answer through other means. A key question in cardiovascular physiology is whether changes detected in t ...
outline27935
... Case Report Outline A. Background It is well documented that Anterior Ischemic Optic Neuropathy is caused by infarction of short posterior cilliary arteries supplying the anterior optic nerve (1,5-8) The low incidence of this condition 2.3-10.3/100,000 make it difficult to evaluate its true pathophy ...
... Case Report Outline A. Background It is well documented that Anterior Ischemic Optic Neuropathy is caused by infarction of short posterior cilliary arteries supplying the anterior optic nerve (1,5-8) The low incidence of this condition 2.3-10.3/100,000 make it difficult to evaluate its true pathophy ...
Central Retinal Vein Occlusion (CRVO) —Visual Disorder in
... the eye, and this is considered to have an effect on the prognosis of CRVO. The reduced intraretinal blood flow due to arteriolar sclerosis causes retinal ischemia, impeded blood flow, and occlusion of the capillaries, leading to fusion of the occluded areas making more extensive vascular occlusion ...
... the eye, and this is considered to have an effect on the prognosis of CRVO. The reduced intraretinal blood flow due to arteriolar sclerosis causes retinal ischemia, impeded blood flow, and occlusion of the capillaries, leading to fusion of the occluded areas making more extensive vascular occlusion ...
Standard PDF - Wiley Online Library
... countries ….. It was shown in many studies that patients in developing countries can easily be exploited. It was also pointed out that studies in developing countries are more easily carried out because of less stringent controls and restrictions. This should not be a justification for conducting stu ...
... countries ….. It was shown in many studies that patients in developing countries can easily be exploited. It was also pointed out that studies in developing countries are more easily carried out because of less stringent controls and restrictions. This should not be a justification for conducting stu ...
Experimental Ocular Irradiation with Accelerated Protons
... obliterated, and the retinal pigment epithelium did not proliferate. After six weeks, a sharply demarcated necrotic white lesion remained with little clinical evidence of reparative processes in the retina or choroid. The large retinal vessels were irregular in caliber and showed sheathing. As in th ...
... obliterated, and the retinal pigment epithelium did not proliferate. After six weeks, a sharply demarcated necrotic white lesion remained with little clinical evidence of reparative processes in the retina or choroid. The large retinal vessels were irregular in caliber and showed sheathing. As in th ...
Electrophysiology in Paediatrics What is Electrophysiology ? Visual
... other procedure under GA and has been referred for ERG • Only ffERG can be performed under GA with handheld light source • Pattern, Multifocal and VEP techniques can not be performed under GA as fixation is required ...
... other procedure under GA and has been referred for ERG • Only ffERG can be performed under GA with handheld light source • Pattern, Multifocal and VEP techniques can not be performed under GA as fixation is required ...
Color Vision in Marine Mammals: A Review
... color vision systems in all these groups. The term "color vision" refers to the capability of a visual system to respond differently to light differing in wavelength only. It is based on the existence of two or more photoreceptor types containing photopigments that maximally absorbe in different spe ...
... color vision systems in all these groups. The term "color vision" refers to the capability of a visual system to respond differently to light differing in wavelength only. It is based on the existence of two or more photoreceptor types containing photopigments that maximally absorbe in different spe ...
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.