Glaucoma is divided into many types, but the most common are primary angle-closure glaucoma and primary open-angle glaucoma. In these patients, if the pupil dilates or enlarges, the angle of the chamber becomes narrower, leading to increased intraocular pressure, which we refer to as an acute attack of glaucoma. After an attack, patients may experience headaches, nausea, and vomiting. Therefore, it is crucial for glaucoma patients to minimize the time spent in dark rooms to prevent pupil dilation and avoid triggering an acute attack of glaucoma.