What is the purpose of the van Herick test related to PACG?

The van Herick test is specifically utilized to assess the risk of angle occlusion in patients at risk for primary angle-closure glaucoma (PACG). During this test, the depth of the anterior chamber is evaluated to determine if the angle between the cornea and the iris is narrow or open. A narrower angle suggests a higher risk of angle closure, which is crucial since angle-closure can lead to increased intraocular pressure and potential vision loss.

This test is particularly valuable for identifying patients who may need further evaluation or intervention to prevent acute glaucoma attacks. By establishing the width of the angle, clinicians can make informed decisions about monitoring or potential surgical interventions to manage the patient's risk effectively.