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ABSTRACT
A 63 year-old man underwent coronary artery bypass surgery. The day following the surgery he complained of blurred vision in the lower-half of the visual field of his left eye. Two days after the surgery blurred vision also developed in his right eye. Sequential involvement of the eyes and elevation of the erythrocyte sedimentation rate led to consideration of a diagnosis of arteritic anterior ischaemic optic neuropathy. A temporal artery biopsy was performed to rule out giant cell arteritis which was negative and a final diagnosis of non-arteritic anterior ischaemic optic neuropathy was made. This case emphasizes that sequential involvement of the eyes may be seen in patients with non-arteritic anterior ischaemic optic neuropathy associated with non-ocular surgery although simultaneous involvement is more commonly seen in this situation.