Love my Ocushield screen for my iMac 27” computer and my iphone screen. I spend a lot of time on my computer & iphone. I was diagnosed with a EpiRetinal Membrane which is scar tissue on my left eye or left retina which I believe can be caused or made worse by time spent on screens as they cause damage to the retina based on research. Since using this Ocushield on my devices and taking eye supplements, I don’t have eye pain. My retina dr has said my condition has improved. I will continue using the Ocushield & eye supplements and recommending them to others who use computers and phones which is everyone. I think everyone should use Ocushield to protect their eyes and especially their retina instead of waiting until they have damage like me. Excellent products & customer service. Highly recommend.