Green eye dirt usually refers to bright yellow purulent discharge, which may be caused by bacterial conjunctivitis, bacterial keratitis, chronic dacryocystitis and other factors. 1. Bacterial conjunctivitis: If the patient’s conjunctival sac is invaded and damaged by pathogenic bacteria, it may lead to inflammatory infection, with symptoms of conjunctival congestion, mucous and mucopurulent discharge. If the patient’s eye is infected with Pseudomonas aeruginosa, the patient’s eye discharge is yellowish green. 2. Bacterial keratitis: If the patient’s cornea is infected by Streptococcus pneumoniae, Pseudomonas aeruginosa and other bacteria, it may lead to bacterial keratitis, resulting in yellow or yellowish-green purulent secretion, and also conjunctival congestion, photophobia and other uncomfortable symptoms. 3. Chronic dacryocystitis: If the patient’s nasolacrimal duct is obstructed, it may lead to the continuous accumulation of mucus secreted by the lacrimal sac, resulting in bacterial infections, which may lead to overflow of tears, eczema, purulent discharge and other uncomfortable symptoms. It is recommended that patients with abnormal eye discharges consult a hospital in a timely manner to assess their condition and follow the doctor’s instructions for treatment.