scotoma/hypoxia

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[Effect of tobacco and alcohol on retinal sensitivity determined with Goldmann's artificial scotoma; effects of their association with anoxia].

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Homonymous paracentral scotomas.

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Of 230 patients with homonymous visual field defects of central origin, 3 had paracentral scotomas. All complained of severe photophobia and difficulty in reading. Two patients suspected that the scotoma had developed as a result of glare; the visual disorder resolved in these cases, but persisted

The effect of hypoxia upon macular recovery time in normal humans.

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Bright light illumination (photostress) of the macula produces a negative after-image in the form of a central scotoma. The time needed for restoring normal visual acuity function, "macular recovery time," may be measured using a nyctometer. We have measured the recovery in 30 normal men, aged 18 to

Central serous chorioretinopathy following hypobaric chamber exposure.

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BACKGROUND Hypobaric hypoxic exposures are associated with a number of risks, most notably decompression sickness and various ophthalmologic disorders, including high altitude retinopathy. Central serous chorioretinopathy (CSCR) is an idiopathic condition that typically affects young males and is

[Clinical study on optic neuropathy and retinopathy subsequent to radiotherapy of nasopharyngeal carcinoma].

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OBJECTIVE To explore the characteristics of optic neuropathy and retinopathy subsequent to radiotherapy of nasopharyngeal carcinoma (NPC). METHODS Sixty-eight eyes from 34 patients with fundus disease and visual disturbance after NPC radiotherapy were studied by vision testing, fundus examination,

Visual abnormalities with multiple trauma.

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The diversity of pathogenetic mechanisms involved in posttraumatic visual impairment was reviewed in a study of the hospital records of 24 patients admitted with multiple injuries. Most major visual abnormalities occurred in young people (average age 33 years) who presented with a wide range of

White centered retinal hemorrhages in vitamin b(12) deficiency anemia.

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BACKGROUND To report a case of severe vitamin B(12) deficiency anemia presenting with white centered retinal hemorrhages. METHODS Interventional case report. RESULTS A 40-year-old man, general practitioner himself, presented with a 1-day history of diminished left visual acuity and a drop-shaped

[High altitude retinopathy: report of 3 cases].

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OBJECTIVE To report three cases of vision loss occurring at high altitude. METHODS Three patients aged 27 to 52 years presented with scotoma and/or visual acuity deficit upon their return from high altitude expeditions above 6000 m. Fundus examination revealed multiple posterior pole hemorrhages,

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