https://www.bbc.com/news/technology-52992675
>Just had my 1st eye doctor visit in 3 years. Now I’m very worried about my future VR use. I have a new eye convergence problem that acts like dyslexia. The doc, a headset owner, is convinced my VR use caused this. He said “these are glasses we usually prescribe to 40 year olds”.
Could this have something to do with the lack of varifocal displays? 
I find that I look at things kind of differently while in VR, since the focus plane is stuck at around two meters away with the CV1.