The disadvantage of low concentration atropine is that it can have some side effects, such as photophobia, blurred near vision, conjunctivitis, and elevated intraocular pressure. 1. Photophobia and blurred vision: Low concentration of atropine will lead to pupil dilation and regulation paralysis, so patients will experience discomfort symptoms such as photophobia and blurred vision. 2. Conjunctivitis: some patients may develop allergic conjunctivitis, allergic blepharitis and other adverse reactions after using low concentration atropine. 3. Elevated intraocular pressure: after using low concentration atropine, the pupil is dilated and the iris is pushed to the periphery, which is easy to block the anterior chamber angle and impede the aqueous humor reflux, and may cause elevated intraocular pressure. It is recommended that patients use low concentration atropine as prescribed by the doctor. When discomfort occurs, consult the doctor promptly to assess the condition and follow the doctor’s instructions for treatment.