By Roger L. Coakes and Patrick J. Holmes Sellors (Auth.)
This variation has been revised and up-to-date and is in color and in a brand new layout. The ebook nonetheless permits the coed or working towards general practitioner to deal with daily ophthalmic difficulties, in addition to spotting these scientific events which require professional realization. It presents a concise account of recent ophthalmology. simple anatomy and body structure are lined in addition to the illnesses of the attention, defined symptom via symptom instead of through the standard systematic procedure. the attention in systemic sickness, ophthalmic investigations and therapy, and customary misconceptions also are mentioned. All illustrations seem at once contrary the correct textual content
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Management There is no treatment of proven benefit in halting the progression of this disease. Genetic counselling is of great importance. M a l i g n a n t melanoma of t h e choroid Clinical features Almost invariably unilateral. A malignant melanoma of the choroid may present as either loss of visual field or loss of acuity depending on the site of the tumour. Ophthalmoscopy reveals a 'solid' retinal detachment which is usually pigmented. Differential diagnosis Pigmented choroidal lesions are common, but the vast majority are benign naevi; the hallmarks of malignancy are elevation and progressive enlargement.
5 and 6 are diagnosed by probing and syringing of the lacrimal passages. The site of an obstruction can be further delineated by contrast radiology (dacryocystography). If symptoms merit treatment canalicular obstructions can be excised and nasolacrimal duct stenosis bypassed by dacryocystorhinostomy (DCR) (see Chapter 35). Acute dacryocystitis requires systemic antibiotic therapy and, when the infection has completely subsided, DCR. 7. Spontaneous cure by the age of 9 months is the rule and this may be aided by regular massage over the lacrimal sac.
The defect slowly enlarges to form an arcuate scotoma which runs into the blind spot. At the same time there is contraction of the peripheral field, particularly on the nasal side. c. In time upper and lower arcuate scotomata meet to leave a central island of vision often only a few degrees across. A temporal area of field may remain after this central island is lost. Glaucomatous cupping of the optic disc. Causes In chronic open angle glaucoma the drainage angle of the eye is normal in appearance.