photophobia/hypoxia

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White - cGMP Interaction Promotes Fast Locomotor Recovery from Anoxia in Adult Drosophila.

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Increasing evidence indicates that the white (w) gene in Drosophila possesses extra-retinal functions in addition to its classical role in eye pigmentation. We have previously shown that w+ promotes fast and consistent locomotor recovery from anoxia, but how w+ modulates locomotor recovery is

Corneal exhaustion syndrome with long-term wear of contact lenses.

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After many years of successful contact lens wear, 3 long-term wearers of polymethyl methacrylate (PMMA) lenses (14, 15, and 18 years) and 1 long-term wearer of thick hydrogel lenses (11 years) suddenly developed intolerance to their lenses. Symptoms included ocular discomfort, reduced vision, and

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

Case reports of three atypical infiltrative keratitis events with high DK soft contact lens wear.

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OBJECTIVE We report three atypical infiltrative keratitis events in patients that had successfully worn highly oxygen permeable (Dk) soft contact lenses on an extended wear (EW) schedule for at least 15 months. These cases highlight the role of patient/practitioner education, patient compliance,

Physiological and ecological implications of ocean deoxygenation for vision in marine organisms.

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Climate change has induced ocean deoxygenation and exacerbated eutrophication-driven hypoxia in recent decades, affecting the physiology, behaviour and ecology of marine organisms. The high oxygen demand of visual tissues and the known inhibitory effects of hypoxia on human vision raise the

[Dependence of the sensitivity of the central visual field on hemoglobin-oxygen saturation].

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Retinal function is very sensitive to changes in hemoglobin oxygen saturation. Characteristic ophthalmological symptoms of oxygen deficiency are: changes in color perception, visual field defect, eye flickering, reduction of visual acuity, seeing double images, defects in neural image

THE EFFECTS OF VARIATIONS IN THE CONCENTRATION OF OXYGEN AND OF GLUCOSE ON DARK ADAPTATION.

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In this study we have analyzed the effects of variations in the concentrations of oxygen and of blood sugar on light sensitivity; i.e. dark adaptation. The experiments were carried out in an air-conditioned light-proof chamber where the concentrations of oxygen could be changed by dilution with

Contact lens wear and microbial keratitis.

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Common types of contact lens are hard, rigid gas-permeable or soft lenses. Most lenses are worn on a daily basis. Cosmetic lenses are worn for non-medical indications. Microbial keratitis, a rare but most significant complication is discussed in this article. Pseudomonas aeruginosa and staphylococci

Novel regulatory mutants of the phosphate regulon in Escherichia coli K-12.

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New pleiotropic mutants were isolated that express either the phoA, psiE or psiO promoter constitutively and simultaneously alter bacterial alkaline phosphatase regulation, carbon utilization or ultraviolet light sensitivity. To do this, Lac+ mutants were isolated from strains with the appropriate

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