Ophthalmology and Visual Sciences

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     Fig. 4: Ambulatory BP and heart rate monitoring records (based on individual readings) over a 24-hour period, starting from about 11 a.m., in a 58-year old woman with bilateral NA-AION, and on no medica­tion. The BP is perfectly normal during the waking hours but there is marked nocturnal arterial hypotension during sleep. (Reproduced from Hayreh et al.1999 [46])