What must be done before performing a visual acuity test for chemical burns to the eye?

Before performing a visual acuity test for chemical burns to the eye, it is essential to flush the eyes. This step is vital because chemical exposure can cause significant damage to the eye's surface and surrounding structures. Flushing the eyes helps to remove any residual chemical agents, thereby minimizing further injury and ensuring that the patient has the best chance of retaining visual function.

By adequately flushing the eyes, you help to clear away harmful substances and reduce the potential for corneal damage or other complications. Once the flushing is complete and the immediate risks associated with the chemical agents have been addressed, a visual acuity test can then be accurately conducted to assess the extent of the injury.