The scope of the topic is too large, so here are some examples of common eye disease symptoms. Conjunctivitis typically presents with symptoms such as conjunctival congestion, foreign body sensation, and tearing. Keratitis can cause eye pain, blurred vision, redness, and tearing. Iriditis can cause symptoms such as pain, blurred vision, photophobia, and lacrimation. Glaucoma can cause symptoms such as blurred vision, eye pain, headache, nausea, and vomiting. Cataracts can cause blurred vision and, if in the swelling phase of a cataract, eye pain. Vitreous opacities can cause miosis, which can be a symptom of various eye diseases. There are also fundus diseases, such as optic papilloedema can cause blurred vision, retinal artery blockage patients’ vision will quickly drop to light perception, age-related macular degeneration can cause vision loss. In short, there are too many eye diseases and a larger range of topics.