I hope it does all work; if so it should mean I only need to really remember that I am myopic once per month (and if I should ever go swimming).
Oh, and does anybody know how much "Sodium Hyaluronate" costs? I ask merely to find out what the likely mark-up is on the "Blink" brand eye-drops I bought on the optician's recommendation. Twenty 0.35ml vials of 0.15% solution of sodium hyaluronate in distilled water (with a bit of sodium chloride and sodium phosphate) cost a fiver. That's £714 per litre.