By Roger L. Coakes and Patrick J. Holmes Sellors (Auth.)

This version has been revised and up to date and is in color and in a brand new layout. The e-book nonetheless permits the coed or working towards health practitioner to deal with daily ophthalmic difficulties, in addition to spotting these scientific events which require professional realization. It presents a concise account of contemporary ophthalmology. easy anatomy and body structure are coated besides the illnesses of the attention, defined symptom by means of symptom instead of through the standard systematic process. the attention in systemic illness, ophthalmic investigations and therapy, and customary misconceptions also are mentioned. All illustrations seem without delay contrary the correct textual content

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Ophthalmoscopy reveals pigmen­ tary degeneration of the retina in which clumps of pigment assume a 'bone corpuscle' pattern. The retinal blood vessels are attenuated and there is a waxy pallor of the optic disc. There is progressive loss of the peripheral visual field leading to 'tunnel vision' and eventual blindness. g. Laurence-MoonBiedl syndrome, which consists of obesity, gonadal hypoplasia and retinitis pigmentosa. Management There is no treatment of proven benefit in halting the progression of this disease.

Retinal embolus. Angiogram showing carotid stenosis. Diseases of the eye Papilloedema Patients with moderate papilloedema due to raised intracranial pressure experience no visual symptoms as a result of the disc swelling but when the papilloedema is severe they may complain of fleeting loss of vision, often in both eyes, lasting for only a few seconds. This indicates that the circulation within the optic nerve is severely embarrassed and the pressure should be relieved as a matter of urgency to prevent the development of optic atrophy and blindness.

Causes A wide variety of bacteria may be responsible. Common organisms include Staphylococcus aureus, Streptococcus pyogenes, haemophilus and coliforms. Bacterial conjunctivitis. g. chloramphenicol, must be instilled frequently in the acute stage of the disease. Culture of the responsible organism seldom plays an important part in the management of acute conjunctivitis. Chlamydial These obligate intracellular bacteria cause trachoma, a chronic blinding conjunctivitis, in many areas of the underdeveloped world {see Chapter 6).

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