Refractive surgery techniques for vision correction
... used and long-term results are good with this operation. IFALPA recommends that pilots willing to have the surgery should thoroughly evaluate the benefits and risks before undertaking such an operation. If a surgery is performed, it should be done by an experienced eye surgeon. In addition, LASIK wi ...
... used and long-term results are good with this operation. IFALPA recommends that pilots willing to have the surgery should thoroughly evaluate the benefits and risks before undertaking such an operation. If a surgery is performed, it should be done by an experienced eye surgeon. In addition, LASIK wi ...
Transitory Eye Shapes and the Vertical Distribution
... FIGURE 4. Vertical distribution of Sandalops melaneholietls. Open circles represent day captures; closed circles represent night captures. A bar with a circle indicates an opening-closing tow with the bar representing the range of the tow and the circle the most likely depth of capture. A circle wit ...
... FIGURE 4. Vertical distribution of Sandalops melaneholietls. Open circles represent day captures; closed circles represent night captures. A bar with a circle indicates an opening-closing tow with the bar representing the range of the tow and the circle the most likely depth of capture. A circle wit ...
Suppression and retinal correspondence in intermittent exotropia
... Without a fusible background 15 showed suppression of the deviating fovea, and the remaining 10 showed superimposition at the objective angle. They concluded that intermittent exotropes have suppressions with NRC. We did not find the consistency of NRC nor the suppression that Awaya et al. reported. ...
... Without a fusible background 15 showed suppression of the deviating fovea, and the remaining 10 showed superimposition at the objective angle. They concluded that intermittent exotropes have suppressions with NRC. We did not find the consistency of NRC nor the suppression that Awaya et al. reported. ...
Iatrogenic Carotid Cavernous Sinus Syndrome
... retinal artery branches on the same side of the retina.4 The basic anatomical pattern of division of the central retinal artery into a superior and an inferior retinal artery is only rarely anomalous and global, altitudinal or quadrantic field loss is to be expected. There is variation as to where, ...
... retinal artery branches on the same side of the retina.4 The basic anatomical pattern of division of the central retinal artery into a superior and an inferior retinal artery is only rarely anomalous and global, altitudinal or quadrantic field loss is to be expected. There is variation as to where, ...
The Head and Neck The Head and Neck
... The conjunctiva is a clear mucous membrane with two easily visible components. The bulbar conjunctiva covers most of the anterior eyeball, adhering loosely to the underlying tissue. It meets the cornea at the limbus. The palpebral conjunctiva lines the eyelids. The two parts of the conjunctiva merge ...
... The conjunctiva is a clear mucous membrane with two easily visible components. The bulbar conjunctiva covers most of the anterior eyeball, adhering loosely to the underlying tissue. It meets the cornea at the limbus. The palpebral conjunctiva lines the eyelids. The two parts of the conjunctiva merge ...
Inflammatory priming predisposes mice to age
... models. Although our investigation of consomic strains failed to identify a chromosome associated with the observed retinal deterioration, pathway analysis of RNA-Seq data from young mice prior to retinal pathological changes revealed that increased vulnerability to ARD in A/J mice was due to initia ...
... models. Although our investigation of consomic strains failed to identify a chromosome associated with the observed retinal deterioration, pathway analysis of RNA-Seq data from young mice prior to retinal pathological changes revealed that increased vulnerability to ARD in A/J mice was due to initia ...
Annual Report 2011 (Word, 80.2KB)
... Hamish Meffin on their new roles as program leaders for the Surgical Program and High-Acuity Program respectively. ...
... Hamish Meffin on their new roles as program leaders for the Surgical Program and High-Acuity Program respectively. ...
PDF
... (scalloped-Gal4) (Mullor et al., 1997) drivers were used to express Sfrp1 in the posterior compartment or the entire wing disc, respectively. As a positive control for planar cell polarity defects, dachsous function (Matakatsu and Blair, 2004) was knocked down by double-stranded (ds) RNAi expression ...
... (scalloped-Gal4) (Mullor et al., 1997) drivers were used to express Sfrp1 in the posterior compartment or the entire wing disc, respectively. As a positive control for planar cell polarity defects, dachsous function (Matakatsu and Blair, 2004) was knocked down by double-stranded (ds) RNAi expression ...
Posterior Uveitis - Michigan Medicine
... picture on right). Though it is named for its impact on the posterior uvea, this condition often involves the retina and vitreous, as well. Drawing courtesy of the Collaborative Ocular Melanoma Study Group ...
... picture on right). Though it is named for its impact on the posterior uvea, this condition often involves the retina and vitreous, as well. Drawing courtesy of the Collaborative Ocular Melanoma Study Group ...
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... How do the eyes and brain produce vision? Vision occurs when photoreceptors in the eyes transmit impulses to the brain, which translates these impulses into images. ...
... How do the eyes and brain produce vision? Vision occurs when photoreceptors in the eyes transmit impulses to the brain, which translates these impulses into images. ...
Novel ophthalmic imaging
... the understanding towards the natural history and mechanism in its development. We evaluated the fundus changes in high myopia by analyzing the eye shapes using three-dimensional (3D) magnetic resonance imaging (MRI) in a case series study. Methods: A total of 95 patients with high myopia (spherical ...
... the understanding towards the natural history and mechanism in its development. We evaluated the fundus changes in high myopia by analyzing the eye shapes using three-dimensional (3D) magnetic resonance imaging (MRI) in a case series study. Methods: A total of 95 patients with high myopia (spherical ...
Conventional Perimetry - Imaging and Perimetry Society
... that are closely analogous to the cartographic lines of elevation on a contour map or to the isobars or the isothermic contours seen on meteorological maps. When 2 or more isopters closely approach one another, they indicate a relatively steep rise or fall of the 3-dimensional surface, while widely ...
... that are closely analogous to the cartographic lines of elevation on a contour map or to the isobars or the isothermic contours seen on meteorological maps. When 2 or more isopters closely approach one another, they indicate a relatively steep rise or fall of the 3-dimensional surface, while widely ...
Sildenafil-associated Nonarteritic Anterior Ischemic Optic Neuropathy
... animal model for NAION would provide an experimental paradigm in which to test a relationship between the two. The association may become more convincing as new cases of NAION after sildenafil use are documented. Many patients do not disclose to their eye doctors information regarding impotence and ...
... animal model for NAION would provide an experimental paradigm in which to test a relationship between the two. The association may become more convincing as new cases of NAION after sildenafil use are documented. Many patients do not disclose to their eye doctors information regarding impotence and ...
Impairment of Vision in a Mouse Model of Usher Syndrome Type III
... (Clrn1/) and Clrn1N48K knockin (Clrn1N48K/N48K) mice under C57BL/6J background. These Clrn1/ and Clrn1N48K/N48K mice did not demonstrate any detectable defects in the retina.8,9,22 Compared with C57BL/6J mice, A/J mice demonstrate a pronounced age-related deterioration of vision, which is also a ...
... (Clrn1/) and Clrn1N48K knockin (Clrn1N48K/N48K) mice under C57BL/6J background. These Clrn1/ and Clrn1N48K/N48K mice did not demonstrate any detectable defects in the retina.8,9,22 Compared with C57BL/6J mice, A/J mice demonstrate a pronounced age-related deterioration of vision, which is also a ...
Morgan, J.I.W., Dubra, A., Wolfe, R., Merigan, W.H., Williams, D.R.
... of individual RPE cells in reflectance imaging in retinal locations where the photoreceptor mosaic is missing in cone–rod dystrophy.17 In vivo reflectance imaging of the RPE cells in normal retina has not been possible with AOSLO techniques, because the axial resolution in combination with the uniqu ...
... of individual RPE cells in reflectance imaging in retinal locations where the photoreceptor mosaic is missing in cone–rod dystrophy.17 In vivo reflectance imaging of the RPE cells in normal retina has not been possible with AOSLO techniques, because the axial resolution in combination with the uniqu ...
51holle 1..6
... posterior pole and equatorial retinal regions indicated that these abnormalities would have been readily recognized, if present, during the initial ophthalmologic examination. To establish if the 5±10 weeks of age time period is the appropriate age to recommend ophthalmic examinations in pups at ris ...
... posterior pole and equatorial retinal regions indicated that these abnormalities would have been readily recognized, if present, during the initial ophthalmologic examination. To establish if the 5±10 weeks of age time period is the appropriate age to recommend ophthalmic examinations in pups at ris ...
Session 150 Pharmacology and cellular mechanisms
... glial and neuronal functionality and purinergic signaling in the retina. Molecular complex, comprised of P2X7 receptor (P2RX7) and pannexin-1 (Panx1) was postulated as the key component of purinergic signaling pathway in the retinal ganglion cells (RGCs). Compared to P2RX7, P2RX4 is much more sensit ...
... glial and neuronal functionality and purinergic signaling in the retina. Molecular complex, comprised of P2X7 receptor (P2RX7) and pannexin-1 (Panx1) was postulated as the key component of purinergic signaling pathway in the retinal ganglion cells (RGCs). Compared to P2RX7, P2RX4 is much more sensit ...
Posterior Vitreous Detachment and Its Sequellae
... vitreous may act as a “shock absorber” to prevent dislocation of internal structures such as the lens and iris during severe blunt trauma. Secondly, the high viscosity of the vitreous may prevent excessive anteroposterior movements of the lens-iris diaphragm, thereby stabilizing the eye and maintain ...
... vitreous may act as a “shock absorber” to prevent dislocation of internal structures such as the lens and iris during severe blunt trauma. Secondly, the high viscosity of the vitreous may prevent excessive anteroposterior movements of the lens-iris diaphragm, thereby stabilizing the eye and maintain ...
VITREOUS HEMORRHAGE
... Contralateral eye examination is often diagnostic eg. Diabetes, ARMD, Eale's, ROP. Presence of peripheral retinal lesions in the other eye should alert one for the possibility of retinal break. 4) Indirect ophthalmoscopy is used primarly to study the fundus. An attempt should be made to determine wh ...
... Contralateral eye examination is often diagnostic eg. Diabetes, ARMD, Eale's, ROP. Presence of peripheral retinal lesions in the other eye should alert one for the possibility of retinal break. 4) Indirect ophthalmoscopy is used primarly to study the fundus. An attempt should be made to determine wh ...
Harada Disease Versus Central Serous Corioretinopathy
... blockage of choroidal fluorescence. Retinal vasculitis is found not very often. A reticular hypo fluorescent pattern with no clinical correlation is found. Swelling obscures the fine granular structure of the fundus and causes typically an intense glisten of the internal limiting membrane (ILM). Vog ...
... blockage of choroidal fluorescence. Retinal vasculitis is found not very often. A reticular hypo fluorescent pattern with no clinical correlation is found. Swelling obscures the fine granular structure of the fundus and causes typically an intense glisten of the internal limiting membrane (ILM). Vog ...
Boomers and Disease Detection with OCT
... Unexplained decreased vision Drusen / AMD Numerous maculopathies and retinopathies And Many Others ...
... Unexplained decreased vision Drusen / AMD Numerous maculopathies and retinopathies And Many Others ...
For the treatment of diabetic macular edema ent of edema
... Light enters through the cornea, passes through the opening in the iris, called the pupil, and then to the lens, which focuses light on the retina —the inner lining of the back of the eye. The retina is lined with light-sensitive cells, or photoreceptors, called rods and cones. The macula is the cen ...
... Light enters through the cornea, passes through the opening in the iris, called the pupil, and then to the lens, which focuses light on the retina —the inner lining of the back of the eye. The retina is lined with light-sensitive cells, or photoreceptors, called rods and cones. The macula is the cen ...
Multiple sclerosis, vision problems and visual impairment interventions
... The resulting loss of visual acuity (VA) is very variable. A study by the Optic Neuritis Study Group (1991) found that an equal proportion of 448 subjects with a first acute episode of optic neuritis (within the last 8 days) had mild (35%), moderate (29%) or severe (36%) loss of visual acuity [18]. ...
... The resulting loss of visual acuity (VA) is very variable. A study by the Optic Neuritis Study Group (1991) found that an equal proportion of 448 subjects with a first acute episode of optic neuritis (within the last 8 days) had mild (35%), moderate (29%) or severe (36%) loss of visual acuity [18]. ...
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... target form.1 Though these microfluctuations have been characterized in many studies, almost nothing is known about the stability of the other monochromatic aberrations such as coma and spherical aberration. Microfluctuations in accommodation are thought to be large enough to affect retinal image qu ...
... target form.1 Though these microfluctuations have been characterized in many studies, almost nothing is known about the stability of the other monochromatic aberrations such as coma and spherical aberration. Microfluctuations in accommodation are thought to be large enough to affect retinal image qu ...
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.