Article history: Received 16 January 2017 Accepted 16 January 2017 Available online 19 January 2017 hypothesis. We are currently doing a clinical trial Minami Aoyama Eye Clinic in Tokyo, Japan using a violet light-emitting desktop light and violet light-transmitting eyeglasses (Clinical trial number: UMIN000021897). Also, a randomized clinical trial is underway on violet light transmitting eyeg...