This prospective, randomized interventional study aims to evaluate the effectiveness of a smart bed-exit alert system for patients undergoing cataract surgery during the preoperative waiting period. Participants will be randomly assigned to either the smart bed-exit alert system group or the standard care group. The study will compare nurse bedside visit frequency and nursing care time during the preoperative waiting period to evaluate whether the smart bed-exit alert system improves patient safety and nursing care efficiency.