– Hypoxia during hours of darkness appears to contribute to diabetic retinopathy, suggesting that nighttime illumination might slow development of the condition, British researchers said on Thursday.
Other studies have suggested that increased oxygen demand from rod receptors during dark adaptation, combined with impaired capillary function, is responsible for retinal damage seen in diabetics. But this theory “has been inferred rather than exactly proved,” said Dr. Neville Drasdo, from Cardiff University, UK.
Dr. Drasdo and colleagues investigated the effect of oxygen inhalation on the amplitude of oscillatory potentials, which reflect retinal function, after dark adaptation in seven patients with type 2 diabetes and eight controls.
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