What systolic blood pressure threshold is associated with hypertensive chorioretinopathy?

• A. 120 mmHg
• B. 140 mmHg
• C. 160 mmHg
• D. 180 mmHg

Answer: (C)

Hypertensive chorioretinopathy happens when blood pressure becomes so high that the eye’s vessels can’t autoregulate properly. That loss of autoregulation leads to leakage and ischemia in the retina and choroid, producing the exudates, cotton-wool spots, and sometimes macular changes you see with severe hypertension.

The threshold most commonly associated with these hypertensive fundus changes is around 160 mmHg systolic. At or above this level, the ocular circulation is pushed into a range where choroidal ischemia and leakage become likely. Lower pressures (like 120 or 140) aren’t typically sufficient to cause this pattern, while much higher pressures (around 180) indicate a malignant crisis with more systemic risk and potentially more dramatic ocular findings, but the 160 mmHg mark is the one most linked to the appearance of hypertensive chorioretinopathy.