It is possible for uveitis and cataracts to affect each other. Uveitis can cause concurrent cataracts, while cataracts that progress to an advanced stage can potentially cause cortical allergic uveitis. Cataracts and uveitis are two different diseases. Cataracts are caused by the lens inside the eye becoming cloudy, and the main manifestation is loss of vision, while uveitis is caused by an autoimmune reaction, and the main manifestations are redness in the eye, eye pain, and blurred vision. The two affect each other. In patients with uveitis, repeated episodes of inflammatory stimulation inside the eye lead to lens degeneration and clouding, resulting in concurrent cataracts, whereas in patients with cataracts, if the disease progresses to an advanced stage, the liquefied lens cortex may spill out of the lens capsule, leading to antigen exposure, which triggers autoreactive inflammation, resulting in cortical allergic uveitis. Patients should consult the ophthalmology department of the hospital in a timely manner, so that the doctor can diagnose the specific cause through detailed examination, and then only take targeted treatment to eliminate the symptoms.