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Abstract
New Hampshire chickens reared from hatching in continuous incandescent light developed shallow anterior chambers and increased intraocular pressures within the first month of life. Subsequently, the globes enlarged. The finding of a shallow anterior chamber plus the gonioscopic appearance of a narrowed angle early in the disease process suggested that an angle closure mechanism was induced by the continuous light. Acetazolamide given in the feed did not alter the anterior chamber changes but did prevent the pressure elevation and the ocular enlargement. None of these phenomena was observed in control chickens kept in diurnal light.