A clinical trial of warm versus cold tetracaine for topical corneal anesthesia in cataract surgery

INTERVENTION: Warm tetracaine solution for topical anesthesia of cornea Cold (room temprature) tetracaine solution for topical anesthesia of cornea CONDITION: Warming enhances the effect and duration of anesthesia of local anesthetics. No study has been done regarding the effects of warming local anesthetics for topical uses. PRIMARY OUTCOME: Means of visual analog score for postoperative pain in warm and cold tetracaine groups SECONDARY OUTCOME: Distribution of different degrees of patient and surgeon satisfaction (high, medium, low) in warm and cold tetracaine groups INCLUSION CRITERIA: Cataract surgery, adult, topical anesthesia, co‐operative informative patients