There are many causes of eye congestion, so the cause must be clearly identified before considering what kind of eye drops to use for treatment, for example, conjunctival congestion, mostly considered to be caused by conjunctivitis, if it is bacterial infection caused by conjunctivitis, consider the use of antibiotic eye drops for treatment, clinical use of levofloxacin eye drops. If the conjunctivitis is viral, it is usually treated with antiviral eye drops, mostly ganciclovir ophthalmic gel. In case of allergic conjunctivitis, anti-allergic eye drops are needed, mostly with Olopatadine drops. It may also be keratitis or uveitis and glaucoma. If it is uveitis, consider treatment with eye drops for dilated pupils and hormonal eye drops, such as tobramycin dexamethasone drops, but these eye drops should not be used for a long time and need to be monitored for intraocular pressure, which can easily lead to glaucoma and cataracts. In the case of glaucoma, eye drops to lower eye pressure are also needed, etc.