Cataracts are the most common eye disease among the elderly and the leading cause of blindness. Doctors explain that cataracts occur due to the clouding of the eye's lens, and when this clouding significantly affects vision, surgery is required. However, many patients experience blurred vision again after surgery, often mistakenly thinking that their cataracts have returned. In reality, this is usually a condition known as "posterior capsule opacification" (PCO).
Diabetes can affect the health of retinal blood vessels, leading to retinal hypoxia and edema. (Image / Heho Health)
Dr. Zhang Yanrui, Director of the Ophthalmology Department at Taipei City Hospital, states that the main causes of post-cataract surgery vision blurriness include posterior capsule opacification, degradation of the artificial lens, diabetic retinopathy, and age-related macular degeneration. Among these, posterior capsule opacification is the most common postoperative complication, affecting about 40% of middle-aged and elderly patients within 3-5 years of surgery, with an even higher rate of 70% among younger patients.
There are many reasons for vision deterioration after cataract surgery. (Image / Heho Health)
Dr. Zhang emphasizes that regular post-operative checkups are crucial. If vision blurriness persists, patients should seek medical attention promptly to identify the cause and receive timely treatment. Early intervention and proper care can enhance post-surgery quality of life. 
This article is authorized by Heho Health.