Conjunctivitis is distinguished from keratitis, iritis, glaucoma, and sclerositis, which are eye diseases. Keratitis is an inflammation of the black eye, the transparent layer of the eye, which is characterized by stinging pain in the eye, vision loss, and blockage of existing things in front of the eyes. Keratitis is much more serious than conjunctivitis and requires targeted medications such as antiviral and antifungal. Iritis is an immune reaction that manifests as atrial flashes inside the eye, posterior corneal deposits, tenderness in the eye, and congestion in the eye appearing as a deep red color, requiring hormonal medications. Glaucoma occurs in the elderly and is characterized by transient eye swelling and pain, even headache, nausea, vomiting, and, most typically, elevated intraocular pressure. Sclerositis is relatively rare and is an immune reaction deep in the eye, with tenderness in the eye and systemic rheumatism and other related diseases, requiring systemic hormonal medication. Well, there are many types of drops for conjunctivitis, and anti-allergy and anti-inflammatory are two of the most common types. Anti-allergic drops include hormonal, non-steroidal, antihistamine and artificial tears. Hormonal drops commonly include flomaxone and dextran eye drops, non-steroidal eye drops include Diflucan and diclofenac sodium, antihistamine drops include emetine and sodium cromoglycate, and artificial tears include vitreous acid sodium, tearran, carboxymethylcellulose sodium, polyvinyl alcohol drops, etc. Anti-inflammatory drops are anti-bacterial, anti-viral and antifungal. Anti-bacterial drops are commonly levofloxacin and tobramycin, and antiviral drops are commonly acyclovir and ganciclovir. Antifungal drops are less common, and the common ones are natamycin, amphotericin B, etc.