醫病共享決策，是一種由醫師和病患共同參與醫療決策的過程。醫師向病患提供關於疾病的基本知識，解釋目前病況，提供治療選項，及各種選擇的優缺點。而病患也需要提出自己的想法，以及對於治療的期待與偏好，以此種雙向溝通，幫助醫病達成共識。本文介紹醫病共享決策在眼科白内障的應用，白内障是眼科門診很常見的疾病，目前手術仍為根治疾病的最好治療方式，但手術的時機與治療的細節仍有許多討論的空間。文章中提供病患白内障的相關基本知識，手術與其他治療選項，及其相應的好處與風險，並提示病患與眼科醫師溝通的重點，包括目前白内障的嚴重程度，開刀的時機與急迫性，開刀的風險，人工水晶體種類與度數與術後照護。

Shared decision making is a process that doctors and patients work together to make decisions regarding the treatment plan of certain disease. Doctors should convey the basic knowledge of the disease to the patients, explain the current status and severity of disease, and also provide the options of treatment and the pros and cons to the patients. The patients also need to clarify their opinions, expectations, and preference about the management. Shared decision making aims to help the doctors and patients to achieve the consensus about the management of disease. Cataract is a very common disease in eye clinic. Currently, surgery is still the best curative treatment for cataract. However, there is still room for discussion regarding the timing for surgery. This article made a brief introduction of cataract, including the basic knowledge, nonsurgical treatment options, surgery, and their pros and cons, and highlighted major points that patients should communicate with their ophthalmologists before making decisions, including the current disease severity, timing for cataract surgery, pros and cons for cataract surgery, the choice of intraocular lens, and post-operative cares.