Pimax 8kX reaches 20/20 readability in Snellen Test

[yanfeng12342000 132]

 The Pimax Vision 8kX has passed a reasonably credible Snellen Test at 20/20 readability. This is a very significant milestone for VR. Full readability for cockpit instruments.

https://community.openmr.ai/t/pimax-vision-8kx-snellen-test-20-20-readability-eye-exam-chart/25456

[HiFlyer 9,359]

22 minutes ago, yanfeng12342000 said:

 The Pimax Vision 8kX has passed a reasonably credible Snellen Test at 20/20 readability. This is a very significant milestone for VR. Full readability for cockpit instruments.

https://community.openmr.ai/t/pimax-vision-8kx-snellen-test-20-20-readability-eye-exam-chart/25456

Though I noticed when perusing the link that there were some significant caveats. Still, a hopeful sign!

[jabloomf1230 2,445]

"Unambigiously better than 20/32. Approximately 20/20."

If you believe this methodology, which has nothing to do with display resolution.

[dongdongliushui 49]

No worries. I will have it very soon and I will give a report.

I already have Pimax 8k+ and HP Reverb, and I have no problem read the cockpit instruments without leaning over.

[vortex681 806]

I'm no expert but it's difficult to know how you could set up the chart for VR based on the parameters you have to enter at https://wolfchart.org (which, apparently, generated the chart used in the test). The site asks for the distance from which the chart is being viewed, not where you want it to be. It also asks you to accurately measure a line on your display in millimetres, which callibrates the chart for the pixel density of the display being used. The test site made the chart on a normal, non-VR display (was it the same pixel density as the HMD?) and then made some adjustments through the HMD to approximate the same chart size and position. The last line of their procedure says "Roughly evaluate result". How can this be remotely accurate? Or is there something I'm not understanding?

[mirage335 0]

Because the wolfchart instructions are not the end of the process for using with VR.

The angular size of the chart displayed on a monitor must be matched to what is seen through VirtualDesktop in VR.

https://github.com/mirage335/extendedInterface/tree/master/app/VirtualDesktop/snellen

Also, ideally, this is done somewhat conservatively, for example, with the website chart scaled to 80% even if there appears to be a qualitatively good match between Virtual/Physical screen size.

Edited April 8, 2020 by mirage335
clarification

[OzWhitey 3,353]

You just need to do the math for how many arc seconds the letters on the 20/20 should be, and reproduce this in the sim.

Should tell you what you need.

Alternatively, you could work out which text in a C172 or 737 cockpit is equivalent to 20/20 when seated at a normal distance, and then work out whether you can read it.

You don't have to be 20 feet/6 meters away. Most Snellen chart testing is done at 3 meters. Stand at the back of 737 cockpit and try to read text x mm high (don't have a chart handy, or i'd check the height myself!)