Free Optive Plus 10ml Eye Drops - Buy 10 boxes or more. 48h delivery. Buy at least 10 Optive Plus 10ml Eye Drops and get one box for free. Add 11 boxes to the cart and use the coupon code at the checkout. Orders ship same day (if received before 15.00) from our UK warehouse, delivery is 2 days with Royal Mail. See all eOpticians.co.uk Discounts!