Tay-Sachs Disease History: The disease is named for Warren Tay (1843-1927)‚ a British ophthalmologist who in 1881 described a patient with a cherry-red spot on the retina of the eye. It is also named for Bernard Sachs (1858-1944)‚ a New York neurologist whose work several years later provided the first description of the cellular changes in Tay-Sachs disease. Sachs also recognized the familial nature of the disorder‚ and‚ by observing numerous cases‚ he noted that most babies with Tay-Sachs
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How can visual illusions help us to understand lower and higher level process in visual perception? A visual illusion may refers to the case where what we perceive differs from what we suppose to be correct. As Nicholas et al. (2001) note that the idea of a visual illusion presupposes that the object or pattern concerned would be different under other conditions. One view of illusions is that they can be used as tools to probe the mechanisms of visual perception‚ because perceptual errors give us
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would like to use the humming Optomap in lieu of pupil dilation. I asked apprehensively if this would be a simpler procedure and was given an enthusiastic nod in return. Against my better judgment‚ I allowed for the optometrist to take images of the retina through the Optomap. Amazingly‚ it was mere seconds per eye and my exam was finished. This machine which at first appeared almost ominous had saved me three hours of my time. I had been by some miracle‚ reunited with the three hours that I thought
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which is the conversion of stimulus energy into neural impulses. The stimulus energy is in the form of light energy (waves)‚ and this light energy enters the eye. After passing through such parts as the iris and the lens‚ the light energy reaches the retina‚ where sense receptors are located and where transduction occurs. Rods and cones are the eye’s sense receptors that produce chemical changes that generate neural signals. These neural signals get relayed to the optic nerve‚ which leads to the brain
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of FA for assessing diabetic macular oedema is not recommended‚ since it offers little additional information beyond that. • Ocular ultrasound Ocular ultrasound (ultrasonography) can be helpful in detecting retinal detachment when viewing of the retina is obscured by cataract‚ vitreous hemorrhage or other media opacity. Blood pressure measurement As hypertension is more prevalent in persons with diabetes and is a potential risk factor for the development and progression of diabetic pressure may
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Postgraduate research topics Department of Optometry and Vision Science Postgraduate research topics The following is a list of research topics offered at the doctorate (PhD)‚ masters and honours level. » Honours » Masters » PhD Honours Research Topics | Affiliation - Faculty and Dept | Supervisor/s details | Comparison of animal models of age related nuclear cataract | Optometry and Vision Science | Professor Paul Donaldson p.donaldson@auckland.ac.nz | Mapping antioxidant transporter
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Goodale‚ 1998). They used the method know as ablation or also called lesioning. Using both recordings from neurons and ablation‚ they found that properties of the ventral and dorsal streams are established by two different types of ganglion cells in the retina‚ which transmit signals to different layers of the LGN.(Goldstein‚ 2014). We know that information in the visual system progresses from the eye to the lateral
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Nursing Fundamentals Case Study-Sensory Directions Please read the case study. Scenario/Prompt Case Study- Sensory You are the nurse at a local assisted living center. Your client is Mrs. S.‚ an 84-year old female client. She wears eyeglasses with bifocal lenses and hearing aid in her left ear. She walks with a shuffling gait‚ using a cane for support. She wears house slippers and housedress. Mrs. S. states "My doctor says I should have my eyes looked at by an expert. It’s been a while
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Diabetic macular edema is a serious complication of Diabetes Milletus‚ with a prevalence of 6.81% worldwide‚ affecting 21 million people. The release of Vascular Endothelial Growth Factor‚ which is thought to be the main factor in the pathogenesis‚ leads to disruption of blood-retinal barrier‚ leading to accumulation of sub- and intra- retinal fluid‚ in the inner and outer plexiform layer. Muller cell‚ pericyte and glial cell dysfunction also contribute to the development of macular edema. Macular
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A complete assessment was performed on Bill Wilson‚ a 69 year old male. Bill appears well-groomed and oriented to person‚ place and time. With examination‚ Bill’s pupils are equal‚ alert‚ and reactive to light and no deficits with extraocular movements. Bill does wear glasses. Wisper test performed‚ no deficits found with hearing‚ no devices were worn. Bill was able to breathe out of his bilateral nostrils. His mucous membranes were pink and moist. Bill has his natural teeth with no problems observed
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