Testing the efficacy of the Developed Lens Case Hygiene Guidelines in lens wearers

INTERVENTION: Lens wearers are asked to follow a lens case cleaning guideline for one month: 1. Rinse contact lens case once with disinfecting solution after use (minimum 5 times per week) 2. Rub lens cases with fingers for 5 seconds 3. Wipe lens cases with tissue for 5 seconds 4. Air‐dry the lens case face down The disinfecting solution given to participants is called AMO Complete, a commercially available lens care product After one month, participants are switched to the control treament (no washout period) CONDITION: contamination in contact lens storage cases PRIMARY OUTCOME: Two log unit of colony forming unit (CFU) reduction in the level of bacteria in the treatment cases when compared to that of the controls. ; The total viable bacterial count is measured by swabbing the lens cases and plating onto agar plates. SECONDARY OUTCOME: nil INCLUSION CRITERIA: contact lens wearers who use lens cases at least five times a week to store their contact lenses. Age: 16‐70