Bilateral hypertensive retinopathy and choroidopathy with bullous retinal detachment was diagnosed in a 17-year-old, female spayed Domestic Short-haired cat. The underlying cause of the systemic hypertension could not be determined. The blood pressure was lowered successfully with the oral application of the L-type calcium channel blocker amlodipine besylate. The cat subsequently regained vision. The improvement in retinal function was documented using electroretinography.