There is a clear blister on the eye membrane, it may be the development of conjunctivitis, conjunctival lymphocysts and other conditions, the specific causes should be ophthalmologic examination. 1. Conjunctivitis: Mostly due to allergies, inflammation and other causes of conjunctivitis. Conjunctivitis, the patient’s conjunctival vasodilatation, exudate will enter the subconjunctival tissues, resulting in conjunctival edema, some patients with more serious conditions, can appear transparent blisters. 2. Conjunctival lymphocysts: Conjunctival lymphocysts are due to conjunctival lymphatic reflux obstruction, resulting in lymphatic vessel blockage, thus causing clear blisters on the eardrum, you can choose levofloxacin eye drops or local hot compresses, to promote the absorption of lymphatic fluids, the situation is serious, but also need to be punctured and released on the cysts, to improve the situation. Clear blisters on the eardrum, should go to the regular hospital for examination, to clarify the cause, active treatment, to avoid serious consequences.