Although there are no long-term studies, ophthalmologists agree there is no reason to be concerned that VR headsets will damage eye development, health or function. ... VR gear. If you wear glasses to correct a refractive error or eye disorder, you should keep your glasses on while using a VR headset. read more
VR glasses has the protecting layer which is used to protect the direct effect on Eyes.I think using VR Glasses for long time will cause strain for sure not only VR glasses any electronic device if you use for a lot of time continuously your eyes will get strain and you will feel little bit pain. read more
In a summary, on one hand, IMHO I don’t think VR headset does more harm as your smartphone does to your eyes because 1) its overall brightness is low; 2) people tents not to stare at one point in VR, compare to smartphone; 3) eyes focus on virtual images at a distance; 4) VR content length is often pretty short. read more