With my pocket optician, you can transpose your prescription from positive to negative cylinder simply and quickly. Opticians work with either but you can be left confused with whether your prescription has changed dramatically or not. Just input your most recent sight test into the calculator and let my pocket optician do the rest. With future updates to come, my pocket optician will be the key application for helping you understand your eyes, prescription, spectacle choice and most importantly, your health.

Special thanks to Rory Brannan