Well now I understand better why some users may be seeing some distortion in headsets like the Pimax Vision 8kX.
Lately, I have tried wearing +1.50 glasses to avoid some very short-term myopia after doing extensive ‘nearwork’. Unlike normal glasses correcting my vision, these cause substantial distortion, enough to actually give me a slight ‘VR nausea effect’ in ‘IRL’.
So it is plausible that any large lenses substantially ‘wrong’ for a person’s eyes will cause some distortion.
If you have contact lenses, try wearing them. If you can use large FOV prescription lenses, maybe try those. If you are comfortable shimming the Pimax lenses to change focus, maybe try that. If one day we can order prescription aspheric glass lenses for Pimax headsets, that might help a few more people.