• Abstract

  • I Can’t Use Screens, but a Projector Works—Is Polarization the Hidden Culprit?

You can try another projectors to say for sure that "projectors are safe"

    moonpie im just saying mine and others' work for me grow a brain

    vivitek d554

    The entirety of your profile is you disagreeing with people. What a guy, lol.

      moonpie also if you read the replies you would see that I have tried several different types

        smilem yea on paper it doest make any sense but it works for me somehow that's why im making this post lol

          evthelegend

          Polarisation might be part of it for you, though there probably isn't any polarisation in e-ink screens - I could be wrong, easy to test with some polarised film or glasses. There are some big threads on here on polarisation that are worth reading if you haven't already.

          There are two other factors to consider, people sit far away from projectors which can help with eye defects, and the resolution of your projector is low which could help a bit too. I used to have a tv that was much more comfortable when watching non hd channels.

            smilem I bet most people will pay 180 EUR if they would surely know it works. They should have very accesable return policy, since this is health product that aims to tackle very specific problem. But if they don't, then perpahs they are not that confident themselves it actually works.

              The only thing I can comment here is that I remember watching a youtube video about polarization of monitors and how some people are sensitive to it. Some people had mentioned doing a simple test using polarized sunglasses and then turning the monitor 90 degrees to see the differences in polarization and if that might be causing the issue.

              What's weird too is that I'm not sure if this kind of wavelength/energy thing (I'm not quite sure what exactly to describe it) tolerance is a part of it because I went back to try to play old Playstation 1 games like Final Fantasy 7 and Metal Gear Solid, and on even the original PS1 hardware connected via HDMI to a TV, I was getting headaches and even the FF7 Steam version I couldn't play longer than an hour using my "safe" PC. So I have no idea why this is happening but I think it's good to discuss it and possibly add to a list of things to "try" heh

              5 days later
              2 months later

              could be the lower ppi

              https://pmc.ncbi.nlm.nih.gov/articles/PMC9302673/

              'Higher resolution devices showed a reduced lag of accommodation to the accommodative demand; however, this may cause a lead of accommodation in myopes for higher resolution display types.'

              accommodative lead eyestrain is the worse type

              have other more esoteric things but this is lowest hang fruit

                qb74
                I'm aware of ppi studies but there's a subtype of eye strain related to accommodative lead. All common eyestrain interventions run opposite to this population, e.g the need for high blue light to stimulate and 'wake up' an insensate accommodative process. high ppi is like reading glasses that run counter to a myope's needs

                I don't bother with performance based studies and subjective symptoms cause poor context. look at the shitshow in orthopedics

                you can supersample windows to 4k on a low pixel density screen to still get the 'high ppi' visual information for high contrast frequency with low spatial frequency. none of these studies do that

                  I find 3LCD chips to be my sweet spot. As long as they support RGB/Non HDR and as long as I turn off the mirror tilting that simulates 4K, I'm good to go.

                    dev