Sensory Aspects of Strabismus
... 6-6B). This patient will have crossed diplopia because the image falls on retina that is temporal to the pseudo-fovea, and temporal retina projects to the opposite hemifield. The patient will experience the crossed diplopia so long as the image is temporal to the pseudo-fovea, even if the eyes are al ...
... 6-6B). This patient will have crossed diplopia because the image falls on retina that is temporal to the pseudo-fovea, and temporal retina projects to the opposite hemifield. The patient will experience the crossed diplopia so long as the image is temporal to the pseudo-fovea, even if the eyes are al ...
Transverse Chromatic Aberration and Vision: Quantification and
... The eye has an approximately spherical shape and an average length of about 24 mm. The main part of the outer shell of the eye consists of the sclera, a dense, non-transparent tissue. The sclera’s main purpose is to protect and hold the eye together. The first surface of the eye that light meets is ...
... The eye has an approximately spherical shape and an average length of about 24 mm. The main part of the outer shell of the eye consists of the sclera, a dense, non-transparent tissue. The sclera’s main purpose is to protect and hold the eye together. The first surface of the eye that light meets is ...
Pathophysiology of Glaucomatous Optic
... endothelial cells release various known endothelial vasoactive agents, which include prostanoids, nitric oxide, endothelins, angiotensins, oxygen free radicals, smooth muscle cell hyperpolarization, thromboxane A2 and other agents.21-24 Reninangiotensin system also exists in the vessel wall and play ...
... endothelial cells release various known endothelial vasoactive agents, which include prostanoids, nitric oxide, endothelins, angiotensins, oxygen free radicals, smooth muscle cell hyperpolarization, thromboxane A2 and other agents.21-24 Reninangiotensin system also exists in the vessel wall and play ...
Assessment of Alleged Retinal Laser Injuries
... Transmission and absorption of optical radiation by ocular media depend on the wavelength of the incident UV radiation, visible light, or infrared radiation.10 Wavelength, pulse duration, spot size, and irradiance (power density, or laser power divided by area) determine the magnitude and lateral ex ...
... Transmission and absorption of optical radiation by ocular media depend on the wavelength of the incident UV radiation, visible light, or infrared radiation.10 Wavelength, pulse duration, spot size, and irradiance (power density, or laser power divided by area) determine the magnitude and lateral ex ...
Surgical Management of Neovascular Glaucoma
... treatment of the ciliary body and the processes to the pars plana (Figs. 13Y16). The power settings are set between 200 and 300 mW of laser power. The intensity and size of the spot are dependent on the distance from the ciliary body as well. It is not necessary to press up and down on the foot pedd ...
... treatment of the ciliary body and the processes to the pars plana (Figs. 13Y16). The power settings are set between 200 and 300 mW of laser power. The intensity and size of the spot are dependent on the distance from the ciliary body as well. It is not necessary to press up and down on the foot pedd ...
Article > Retinal Defocus and Eye Dominance Effect on Eye
... road. Since most people are right-eye dominant, when using the side view mirror on the driver’s side to assess oncoming traffic from behind, with quick saccadic-based “glances” into the mirror, the facial anatomy (e.g., nose) may block the right eye, and thus the non-dominant left eye alone may be e ...
... road. Since most people are right-eye dominant, when using the side view mirror on the driver’s side to assess oncoming traffic from behind, with quick saccadic-based “glances” into the mirror, the facial anatomy (e.g., nose) may block the right eye, and thus the non-dominant left eye alone may be e ...
Peripheral Vision Can Influence Eye Growth and Refractive
... those that exhibited peripheral hyperopia in both the sagittal and tangential meridians, optical conditions known to promote axial elongation in animals, were three times more likely to exhibit adult-onset myopia than those who showed myopic peripheral refractions in at least one meridian.43 Althoug ...
... those that exhibited peripheral hyperopia in both the sagittal and tangential meridians, optical conditions known to promote axial elongation in animals, were three times more likely to exhibit adult-onset myopia than those who showed myopic peripheral refractions in at least one meridian.43 Althoug ...
Measured double-pass intensity point-spread function
... the wavefront sensor (WS). Impressive reduction of the wavefront aberrations, tightening of the reconstructed point-spread function (PSF), and increase of the corresponding Strehl ratio were reported. These changes, however, reflect changes brought to the wavefront aberrations as measured by the WS ...
... the wavefront sensor (WS). Impressive reduction of the wavefront aberrations, tightening of the reconstructed point-spread function (PSF), and increase of the corresponding Strehl ratio were reported. These changes, however, reflect changes brought to the wavefront aberrations as measured by the WS ...
Open angle glaucoma and non- central retinal vein occlusion – the
... eyes with nCRVO without OAG had peripheral occlusions, always occurring at a location where an artery crossed a vein. This is in keeping with earlier studies (Zhao et al., 1993). Only one eye in the nCRVO-OAG group had an occluded vein distal to the optic disk and this was the only eye in the study ...
... eyes with nCRVO without OAG had peripheral occlusions, always occurring at a location where an artery crossed a vein. This is in keeping with earlier studies (Zhao et al., 1993). Only one eye in the nCRVO-OAG group had an occluded vein distal to the optic disk and this was the only eye in the study ...
Pancreatic polypeptide-like immunoreactive nerves in the
... periphery, are surrounded by APP-like immunoreactive nerves (Fig. 3A). There is also a high density of nerve fibers along the anterior surface of the dilator muscle (Fig. 3B). Some, but not many, immunoreactive fibers are visible within the substance of the sphincter muscle (Fig. 3C). In general, th ...
... periphery, are surrounded by APP-like immunoreactive nerves (Fig. 3A). There is also a high density of nerve fibers along the anterior surface of the dilator muscle (Fig. 3B). Some, but not many, immunoreactive fibers are visible within the substance of the sphincter muscle (Fig. 3C). In general, th ...
Sparrow RPE heath and disease 2010
... melanin in human RPE varies amongst racial groups; in fact however, while pigmented cells of neural crest origin (melanocytes) exhibit marked racial variability in melanin density, the melanin pigmentation in neuroepithelium-derived RPE does not vary with race [10]. The autofluorescence of the human ...
... melanin in human RPE varies amongst racial groups; in fact however, while pigmented cells of neural crest origin (melanocytes) exhibit marked racial variability in melanin density, the melanin pigmentation in neuroepithelium-derived RPE does not vary with race [10]. The autofluorescence of the human ...
Diabetes Retinal Screening - Nationwide Service Framework Library
... specification, the tier one Specialist Medical and Surgical service specification and, where age appropriate, the tier one Services for Children and Young People service specification. Background Diabetic retinopathy (DR)1 can be detected by systematic retinal screening, and significant retinopathy ...
... specification, the tier one Specialist Medical and Surgical service specification and, where age appropriate, the tier one Services for Children and Young People service specification. Background Diabetic retinopathy (DR)1 can be detected by systematic retinal screening, and significant retinopathy ...
Human eye - CDCC/USP
... Full adaptation is dependent on good blood flow; thus dark adaptation may be hampered by poor circulation, and vasoconstrictors like tobacco. ...
... Full adaptation is dependent on good blood flow; thus dark adaptation may be hampered by poor circulation, and vasoconstrictors like tobacco. ...
Chapter 7 Body Systems
... – Changing head position produces a change of pressure on the otolithweighted matrix, which stimulates hair cells that, in turn, stimulate receptors of vestibular nerve – Vestibular nerve fibers conduct impulses to the brain and produce a sensation of the position of the head and also a sensation of ...
... – Changing head position produces a change of pressure on the otolithweighted matrix, which stimulates hair cells that, in turn, stimulate receptors of vestibular nerve – Vestibular nerve fibers conduct impulses to the brain and produce a sensation of the position of the head and also a sensation of ...
Design of a Mobile Application for Eye Signs Screening
... pathologies and that could be used almost by everybody, even in low income countries. In this master thesis the necessary features of a mobile application for eye signs screening are described, portraying some ocular pathologies (amblyopia and retinoblastoma e.g.) that can be detected with a photogr ...
... pathologies and that could be used almost by everybody, even in low income countries. In this master thesis the necessary features of a mobile application for eye signs screening are described, portraying some ocular pathologies (amblyopia and retinoblastoma e.g.) that can be detected with a photogr ...
Intra-arterial Chemotherapy for Retinoblastoma
... There were no visible emboli in any artery on ophthalmoscopy or fluorescein angiography. On fluorescein angiography, the 3 cases of posttreatment central retinal artery obstruction and branch retinal artery obstruction showed slow perfusion of the attenuated retinal arteries. Despite the poor flow, ...
... There were no visible emboli in any artery on ophthalmoscopy or fluorescein angiography. On fluorescein angiography, the 3 cases of posttreatment central retinal artery obstruction and branch retinal artery obstruction showed slow perfusion of the attenuated retinal arteries. Despite the poor flow, ...
Title High-Resolution Imaging of Retinal Nerve Fiber Bundles in
... other information about the eyes. Eyes were classified as having glaucoma if the examiner identified either diffuse or localized rim thinning. If all 3 examiners did not agree with the classification of an eye, the group reviewed and discussed the fundus color photographs and stereo photographs unti ...
... other information about the eyes. Eyes were classified as having glaucoma if the examiner identified either diffuse or localized rim thinning. If all 3 examiners did not agree with the classification of an eye, the group reviewed and discussed the fundus color photographs and stereo photographs unti ...
spatial disorientation
... The retina, an evaginated portion of the embryonic brain, consists of an outer layer of pigmented epithelium and an inner layer of neural tissue. Contained within the latter layer are the sensory rod and cone cells, the bipolar and horizontal cells that comprise the intraretinal afferent pathway fro ...
... The retina, an evaginated portion of the embryonic brain, consists of an outer layer of pigmented epithelium and an inner layer of neural tissue. Contained within the latter layer are the sensory rod and cone cells, the bipolar and horizontal cells that comprise the intraretinal afferent pathway fro ...
Extraocular dorsal signal affects the developmental fate of the optic
... vesicle subsequently invaginates to form a doublelayered optic cup, whose inner and outer layers further develop into the neural retina (NR) and the retinal pigment epithelium (RPE), respectively (Saha et al. 1992; Chow & Lang 2001). At the same time, the invagination of the optic vesicle extends fr ...
... vesicle subsequently invaginates to form a doublelayered optic cup, whose inner and outer layers further develop into the neural retina (NR) and the retinal pigment epithelium (RPE), respectively (Saha et al. 1992; Chow & Lang 2001). At the same time, the invagination of the optic vesicle extends fr ...
Physical properties of experimental vitreous membranes. I
... (Type 3). This material was difficult to handle and trim into the small size necessary for testing. These membranes were often quite transparent, and could only be seen by means of oblique illumination. Variable amounts of vitreous gel surrounded each type of membrane and could not be easily separat ...
... (Type 3). This material was difficult to handle and trim into the small size necessary for testing. These membranes were often quite transparent, and could only be seen by means of oblique illumination. Variable amounts of vitreous gel surrounded each type of membrane and could not be easily separat ...
Module - Mount Sinai Hospital
... was about 9.5 months. However, these children may be enrolled in early intervention programs that do not specialize in visual impairments before that time. Optic nerve hypoplasia (failure of the optic nerve to develop normally during the prenatal period) was diagnosed at an average age of 4.3 months ...
... was about 9.5 months. However, these children may be enrolled in early intervention programs that do not specialize in visual impairments before that time. Optic nerve hypoplasia (failure of the optic nerve to develop normally during the prenatal period) was diagnosed at an average age of 4.3 months ...
Metrics of Retinal Image Quality Predict Visual
... with average or better than average P HC visual acuity, neural factors create a physiological limit that confines optical effects to a narrow acuity range of typically between 20/15 and 20/10. Recently, using an adaptive mirror to minimize the wavefront error of a normal eye with a dilated pupil, ac ...
... with average or better than average P HC visual acuity, neural factors create a physiological limit that confines optical effects to a narrow acuity range of typically between 20/15 and 20/10. Recently, using an adaptive mirror to minimize the wavefront error of a normal eye with a dilated pupil, ac ...
תקצירים
... AND TALKS PRESENTED AT THE 26TH MEETING, MARCH 2006 ירושלי, רועי הולצמ – האוניברסיטה העברית.1 ROI HOLZMAN- THE HEBREW UNIVERSITY, JERUSALEM ...
... AND TALKS PRESENTED AT THE 26TH MEETING, MARCH 2006 ירושלי, רועי הולצמ – האוניברסיטה העברית.1 ROI HOLZMAN- THE HEBREW UNIVERSITY, JERUSALEM ...
Ganglion Cell Analysis Ganglion Cell Analysis
... Measures thickness for the sum of the ganglion cell layer and inner plexiform layer (GCL + IPL layers) using data from the Macular 200 x 200 or 512 x 128 cube scan patterns. ...
... Measures thickness for the sum of the ganglion cell layer and inner plexiform layer (GCL + IPL layers) using data from the Macular 200 x 200 or 512 x 128 cube scan patterns. ...
Features of the Retinotopic Representation in the Visual Wulst of a
... on the retinotopic representation of the visual field within this area. The experiments were performed in the zebra finch, a small songbird with laterally placed eyes and in this aspect representative of most avian tribes. The eyes of birds are, as mentioned before, in most aspects similar to those ...
... on the retinotopic representation of the visual field within this area. The experiments were performed in the zebra finch, a small songbird with laterally placed eyes and in this aspect representative of most avian tribes. The eyes of birds are, as mentioned before, in most aspects similar to those ...
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.