Cliradex: PRN Online Coupon - Take 10% Off online on all products by using Coupon Code: GETPVG at checkout! Coupons cannot be combined and valid through December 31st. Only one usage and no minimum purchase required. The PRN is committed to assisting its partner eye health professionals in supporting the health, education, and well-being of their patients through superior customer service and the application of peer-reviewed clinical research.