Clinically recommended types of anti-allergy eye drops include decongestants, H1 receptor antagonists and mast cell stabilizers, but the specific type of eye drops used is related to the patient’s condition. Clinical anti-allergic effect is better is the decongestant – histamine receptor antagonist compound preparation, such as compound naphazoline eye drops, the main ingredient is naphazoline and phenylephrine, naphazoline is adrenomimetic, has a vasoconstrictive effect, and phenylephrine for histamine H1 receptor antagonism, has an anti-allergic effect. Histamine H1 receptor antagonist, such as emestin eye drops, has an anti-allergic effect, has good penetration ability, can effectively relieve allergy-induced eye itching and redness and other discomfort symptoms. Mast cell stabilizers, such as olopatadine eye drops, are mast cell membrane stabilizers and relatively selective histamine H1 receptor antagonists, which can inhibit type I rapid-onset allergic reactions and relieve patients’ discomfort. It is recommended that patients with ocular allergy consult a doctor in time to assess their condition and choose the appropriate medication as prescribed by the doctor.