By Paul R Healey; Ravi Thomas
Glaucoma is the commonest neurodegenerative sickness and the second one commonest reason behind blindness all over the world after cataract. whereas the prognosis of end-stage glaucoma could be made by means of any health care professional proficient within the use of the ophthalmoscope, it truly is ultimate to diagnose glaucoma at an early degree, whilst intervention can adjust the process the illness and alter the analysis. full of wonderful illustrations, ''Fast proof: Glaucoma'' is bursting with sensible details at the sickness, together with: a concise evaluation of the glaucoma subtypes and their worldwide occurrence; a transparent rationalization of the pathophysiology along what the sufferer really stories; the inquiries to ask while taking a historical past; the main parts of a complete eye exam; the right way to reduce the influence of the disorder at the sufferer and decrease hazard elements; the newest scientific and surgical remedies; and, tracking of the - together with aspect of follow-up examinations. ''Fast evidence: Glaucoma'' is a hugely readable useful reference for all scientific and eyecare practitioners, an reduction for college kids and scientists enthusiastic about the research of eye sickness and a valid review for an individual drawn to this tough sickness. what's Glaucoma? How can or not it's detected? How can it's taken care of? ''Fast evidence: Glaucoma'' solutions all of those questions
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Additional info for Glaucoma
25 Perimetry printout of a normal visual field, split into zones for analysis. Zone 1: patient and test information. Zone 2: reliability indices and foveal threshold. Zone 3: gray scale (not relied on to make a diagnosis). Zone 4: total-deviation plot, showing a point-by-point comparison of the patient’s visual sensitivity with age-related normal values, which calls attention to any generalized sinking of the hill of vision but cannot confirm the presence of a diagnostic localized scotoma. Zone 5: pattern-deviation plot, showing the deviation of the individual points from age-related normal values after adjusting for any generalized depression of the hill of vision.
Similarly, in a disc with thinning of the rim as well as an optic disc hemorrhage, the specificity is high enough to ‘rule in’ glaucoma. On the other hand, the sensitivity of individual signs is not high enough to ‘rule out’ glaucoma unless most, or all, the signs are absent. Where there is only one sign, it is particularly important that disc appearance corresponds with the visual field result. 55 © 2010 Health Press Ltd. 1 at any one point outside the temporal area • Optic disc hemorrhage • Focal or diffuse nerve fiber layer loss • Acquired pit of the optic nerve The simplest rule to help with the diagnosis of glaucomatous damage at the optic disc is thus: unless proved otherwise, all optic discs have glaucomatous changes.
Assessment of ocular motility is important because detection of amblyopia or sensory exotropia may affect the management plan. For example, an eye with sensory exotropia and dense amblyopia will not be treated as aggressively as a normal eye with good visual potential. © 2010 Health Press Ltd. qxd 17/2/10 13:56 Page 37 Diagnosis and clinical features Slit-lamp examination (before and after pupil dilatation) provides a highly magnified three-dimensional view of the eye surface, anterior chamber, lens, vitreous, retina and optic disc.