UPMC Eye Center Highlights
... whether they buy reduced complications so common in traditional glaucoma surgeries at the cost of diminished IOP-lowering efficacy. This concern grew when first results of trabecular bypass micro stents seemed to indicate that the effect was only slightly better than that of cataract surgery alone. ...
... whether they buy reduced complications so common in traditional glaucoma surgeries at the cost of diminished IOP-lowering efficacy. This concern grew when first results of trabecular bypass micro stents seemed to indicate that the effect was only slightly better than that of cataract surgery alone. ...
Perioperative Vision Loss: Considerations and Management
... obtain and document. Many cases of POVL go without being reported at all, or if the incident is investigated in closed claims court, then it would not be reported until the case is completely closed. Other surgical procedures that have been associated with POVL include head and neck surgery, sinus s ...
... obtain and document. Many cases of POVL go without being reported at all, or if the incident is investigated in closed claims court, then it would not be reported until the case is completely closed. Other surgical procedures that have been associated with POVL include head and neck surgery, sinus s ...
Chapter 7: Eyes and Ears
... of aging of the lens. Everyone who lives long enough will eventually develop cataracts. The third alteration of the lens is a reduction in its ability to refract light. This change results from accumulation of damaged proteins plus agerelated formation of abnormal proteins. These two changes offset ...
... of aging of the lens. Everyone who lives long enough will eventually develop cataracts. The third alteration of the lens is a reduction in its ability to refract light. This change results from accumulation of damaged proteins plus agerelated formation of abnormal proteins. These two changes offset ...
안구의 내하방 편위 - Research in Vestibular Science
... reactive to light. Both eyes were fixed on both horizontal and vertical doll's eye maneuvers. The left eye was hypotropic. She showed intermittent bobbing eye motion, which was more prominent or purely monocular in the left eye. CT scan revealed pontine tegmental hemorrhage mainly in the left side, ...
... reactive to light. Both eyes were fixed on both horizontal and vertical doll's eye maneuvers. The left eye was hypotropic. She showed intermittent bobbing eye motion, which was more prominent or purely monocular in the left eye. CT scan revealed pontine tegmental hemorrhage mainly in the left side, ...
DanielBearMCB105 Research Proposal
... Binocular rivalry occurs in conscious humans and monkeys when different images are simultaneously presented to each eye (1, 2). If the distinct images cover a relatively small portion of the visual field, humans will usually see one image for several seconds, then the other, switching back and forth ...
... Binocular rivalry occurs in conscious humans and monkeys when different images are simultaneously presented to each eye (1, 2). If the distinct images cover a relatively small portion of the visual field, humans will usually see one image for several seconds, then the other, switching back and forth ...
Psychology
... tendency to organize the visual field into objects (figures) that stand apart from the surroundings (ground). ...
... tendency to organize the visual field into objects (figures) that stand apart from the surroundings (ground). ...
No Binocular Rivalry in the LGN of Alert Macaque Monkeys
... rather than peristimulus time histograms. This was because the timing of binocular rivalry effects within each trial was expected to be random with respect to stimulus onset time. Therefore, pooling data from multiple trials in a PSTH would tend to obscure rivalry effects rather than enhance them. S ...
... rather than peristimulus time histograms. This was because the timing of binocular rivalry effects within each trial was expected to be random with respect to stimulus onset time. Therefore, pooling data from multiple trials in a PSTH would tend to obscure rivalry effects rather than enhance them. S ...
Neuronal mechanisms for the perception of ambiguous stimuli
... firing patterns within populations of cortical neurons. Second, investigators are now beginning to think about the relationships among the particular signals that correlate with perceptual decisions when subjects view ambiguous figures and the more general neuronal signals that are involved in perce ...
... firing patterns within populations of cortical neurons. Second, investigators are now beginning to think about the relationships among the particular signals that correlate with perceptual decisions when subjects view ambiguous figures and the more general neuronal signals that are involved in perce ...
Visual system
... • First occurrence. Her pre-symptom vision was “20/20 in both eyes, without glasses.” • No double vision. • Vision was good before this episode - has had frequent visits to neurologists for her other MS care, visual system often evaluated in these visits and was always “normal.” • Has covered each e ...
... • First occurrence. Her pre-symptom vision was “20/20 in both eyes, without glasses.” • No double vision. • Vision was good before this episode - has had frequent visits to neurologists for her other MS care, visual system often evaluated in these visits and was always “normal.” • Has covered each e ...
Pioneers of cortical plasticity: six classic papers by Wiesel and Hubel
... competition from the nondeprived eye in a small region of cortex and experimentally support the hypothesis that the atrophy in the LGN arose from competition between the eye-specific inputs in the cortex. On the basis of long-term dark rearing from birth in a variety of mammals, a number of early in ...
... competition from the nondeprived eye in a small region of cortex and experimentally support the hypothesis that the atrophy in the LGN arose from competition between the eye-specific inputs in the cortex. On the basis of long-term dark rearing from birth in a variety of mammals, a number of early in ...
phys chapter 51 [3-20
... register, excitation of specific interference neurons in visual cortex disappears Even when eyes fused with each other, it is still impossible for all corresponding points in both visual images to be exactly in register at same time; degree of nonregister provides neural mechanism for stereopsis ( ...
... register, excitation of specific interference neurons in visual cortex disappears Even when eyes fused with each other, it is still impossible for all corresponding points in both visual images to be exactly in register at same time; degree of nonregister provides neural mechanism for stereopsis ( ...
Neuronal activity in human primary visual cortex correlates with
... are initiated at later stages of processing and then propagated via feedback to V1. It is also possible that both processes occur. Specifically, local interactions among V1 neurons may trigger the perceptual alternations during rivalry, whereas interactions in later visual areas may reinforce the ne ...
... are initiated at later stages of processing and then propagated via feedback to V1. It is also possible that both processes occur. Specifically, local interactions among V1 neurons may trigger the perceptual alternations during rivalry, whereas interactions in later visual areas may reinforce the ne ...
A Stereoscopic Look at Visual Cortex
... movements are driven by anti-correlated RDSs in a manner that is consistent with the response of V1 and MST neurons (Masson et al. 1997; Takemura et al. 2001). In other words, the motor side of stereoscopic processing displays characteristics that are easy to reconcile with the signals that have bee ...
... movements are driven by anti-correlated RDSs in a manner that is consistent with the response of V1 and MST neurons (Masson et al. 1997; Takemura et al. 2001). In other words, the motor side of stereoscopic processing displays characteristics that are easy to reconcile with the signals that have bee ...
Visual circuits in flies: beginning to see the whole picture
... Recent anatomical and functional work focusing on the different cell types in the optic lobes of Drosophila has defined a precise neuronal circuit for motion detection. ...
... Recent anatomical and functional work focusing on the different cell types in the optic lobes of Drosophila has defined a precise neuronal circuit for motion detection. ...
Chapter 9
... • Taste cells have taste hairs – They project into a pore at the tip of the taste bud ...
... • Taste cells have taste hairs – They project into a pore at the tip of the taste bud ...
Vision - HallquistCPHS.com
... verge in front of the retina; one cause of this is an eyeball longer than normal in relation to the lens. a. Inflexibility of the lens may cause the emergence of farsightedness as we get older. b. Thinness of the lens is unrelated to near- or farsightedness. c. A shorter-than-normal eyeball is relat ...
... verge in front of the retina; one cause of this is an eyeball longer than normal in relation to the lens. a. Inflexibility of the lens may cause the emergence of farsightedness as we get older. b. Thinness of the lens is unrelated to near- or farsightedness. c. A shorter-than-normal eyeball is relat ...
Binocular Disparity Review and the Perception of Depth
... Others (Ohzawa et al., 1990, 1996) have suggested that the shift is between the excitatory and inhibitory subregions within the aligned receptive field envelopes (Figure 3b). For simplicity, both of these alternatives will be referred to as “receptive field shift” when it is not essential to disting ...
... Others (Ohzawa et al., 1990, 1996) have suggested that the shift is between the excitatory and inhibitory subregions within the aligned receptive field envelopes (Figure 3b). For simplicity, both of these alternatives will be referred to as “receptive field shift” when it is not essential to disting ...
Study Guides/Part_4
... Example: left lesion- cannot generate any leftward conjugate eye movement (left eye is missing direct activation of LR); can generate rightward movements in right eye Intact convergence feeding directly into the oculomotor nuclei Strabismus: misalignment of the visual axis with respect to an object ...
... Example: left lesion- cannot generate any leftward conjugate eye movement (left eye is missing direct activation of LR); can generate rightward movements in right eye Intact convergence feeding directly into the oculomotor nuclei Strabismus: misalignment of the visual axis with respect to an object ...
ppt - IISER Pune
... Gradients of signaling molecules pattern the neural tissue into different parts Axons of neurons find their way to specific partners Neurons form connections with each other and with muscles ...
... Gradients of signaling molecules pattern the neural tissue into different parts Axons of neurons find their way to specific partners Neurons form connections with each other and with muscles ...
Erin Hardie
... however, it is possible to be neurologically normal and approximately 29% can academically be considered average (7). This explains how our patient lived 31 years without a diagnosis. However, most patients have the congenital form and are discovered at birth with approximately 1 in 500 children hav ...
... however, it is possible to be neurologically normal and approximately 29% can academically be considered average (7). This explains how our patient lived 31 years without a diagnosis. However, most patients have the congenital form and are discovered at birth with approximately 1 in 500 children hav ...
Electrophysiology in Vision How VEP and ERG Can Impact Your
... Postdoctoral Glaucoma Fellow at the time, presently the Director of Ophthalmic Pathology at the University of Toronto ), found in a primate model that there was extensive loss of nerve cells in the lateral geniculate nucleus with progressive glaucoma, a process known as transneuronal degeneration. A ...
... Postdoctoral Glaucoma Fellow at the time, presently the Director of Ophthalmic Pathology at the University of Toronto ), found in a primate model that there was extensive loss of nerve cells in the lateral geniculate nucleus with progressive glaucoma, a process known as transneuronal degeneration. A ...
Evidence of Basal Temporo-occipital Cortex
... activation to ‘front’ compared to ‘back’ objects. This discrepancy may be due to the spatial resolution of the subdural technique. Our electrodes had 1 mm diameter exposure separated by 10 mm and therefore they had a restricted area or recording which may have included only fusiform regions with mor ...
... activation to ‘front’ compared to ‘back’ objects. This discrepancy may be due to the spatial resolution of the subdural technique. Our electrodes had 1 mm diameter exposure separated by 10 mm and therefore they had a restricted area or recording which may have included only fusiform regions with mor ...
Optometric Management Of A Patient With Parietal Lobe Injury
... shrivels back toward the cell body forming a bulb, with this bulb becoming one of the distinguishing features of DAI.8-11 Thus, DAI is characterized by axonal stretching, tearing, and bulb formation. This leads to deficits in multiple areas of the brain and subsequently, a global insult to the brain ...
... shrivels back toward the cell body forming a bulb, with this bulb becoming one of the distinguishing features of DAI.8-11 Thus, DAI is characterized by axonal stretching, tearing, and bulb formation. This leads to deficits in multiple areas of the brain and subsequently, a global insult to the brain ...
Stereopsis recovery
Stereopsis recovery, also recovery from stereoblindness, is the phenomenon of a stereoblind person gaining partial or full ability of stereo vision (stereopsis).It has long been established state of the art that the therapeutic treatment of stereoblind patients should aim at recovering stereo vision as far as possible in very young children, as well as in patients who had acquired but lost their ability for stereopsis due to a medical condition. In contrast, this aim has normally not been present in the treatment of those who missed out on learning stereopsis during their first few years of life. In fact, the acquisition of binocular and stereo vision was long thought to be impossible unless the person acquired this skill during a critical period in infancy and early childhood. This hypothesis normally went unquestioned and has formed the basis for the therapeutic approaches to binocular disorders for decades. It has been put in doubt in recent years. In particular since studies on stereopsis recovery began to appear in scientific journals and it became publicly known that neuroscientist Susan R. Barry achieved stereopsis well into adulthood, that assumption is in retrospect considered to have held the status of a scientific dogma.Very recently, there has been a rise in scientific investigations into stereopsis recovery in adults and youths who have had no stereo vision before. While it has now been shown that an adult may gain stereopsis, it is currently not yet possible to predict how likely a stereoblind person is to do so, nor is there general agreement on the best therapeutic procedure. Also the possible implications for the treatment of children with infantile esotropia are still under study.