Safety and Efficacy of Nyxol (0.75% Phentolamine Ophthalmic Solution) to Reverse Pharmacologically-Induced Mydriasis

A randomized, parallel arm, double-masked, placebo-controlled Phase 3 study in at least 168 randomized subjects (160 completed), evaluating the safety and efficacy of Nyxol in subjects with pharmacologically-induced mydriasis. Following the successful completion of screening, each subject will be stratified by eye color and then simultaneously be randomized to mydriatic agent (unmasked) and treatment (masked). Treatment randomization will be 1:1, Nyxol or placebo (vehicle). Stratification by iris color will be 1:1, light or dark irides. The mydriatic agent randomization will be 3:1:1 (2.5% phenylephrine, 1% tropicamide, and Paremyd). That is, approximately 60% of the randomized subjects will receive one drop of 2.5% phenylephrine 1 hour before treatment (96 completed subjects), approximately 20% will receive one drop of 1% tropicamide 1 hour before treatment (32 completed subjects), and approximately 20% will receive Paremyd 1 hour before treatment (32 completed subjects). At the treatment visit, subjects who have been randomized and stratified by iris color (1:1 \[light/dark\]) will receive one of three approved mydriatic agents approximately 1 hour prior to receiving study treatment. Measurements will be measured before (-1 hour /baseline) and 60 minutes after (maximum/0 minutes) the mydriatic agent instillation in each eye (i.e. right before the study treatment is administered), and at 30 minutes, 60 minutes, 90 minutes, 2 hours, 3 hours, 4 hours, and 6 hours after treatment dosing. Measurements will include pupil diameter (PD), distance and near visual acuity (VA), accommodation, and redness in each eye. At the Follow-Up Visit, which is 1 day after Visit 1, measurements will again be recorded 24 hours after treatment dosing.