I would like to draw your attention to one important thing: VR glasses will lead to more Myopia, unless you implement some very important features.
I myself am near-sighted, so I've done a lot of research on myopia and why it appears. I want to prevent many people to become short-sighted, too. You hold the key in your hands, to protect your customers eyesight.
Unfortunately we do not yet fully understand why near-sightedness appears and progresses, but the following things demonstrably contribute to it:
1. Constant and dark conditions
2. Permanent fixation of nearby objects without alternation.
a) → The eyes are turned inwards, the outer ocular muscles are permanently stretched, the inner one's are permanently tensed.
b) The musculus ciliaris also is permanently tensed and focused on the close.
Without taking the following into consideration, many youths will become nearsighted.
Fortunately VR glosses do automatically consider point 2a). The eyes are no longer turned inwards permanently, which usually is the case while playing computer on a classic monitor or while reading. But more important are item 1 and 2b).
1. In another forum post it was told that the Rift will have approximately 3500lux on the eye's surface. This is better than in normal rooms but still to dark to prevent myopia. At least 10000 lux are required, I would recommend 15000 lux or more. The eye should not be exposed to 15000 lux all the time but at least 10 times per hour.
2b) It will be difficult but for sure possible, to produce an artificial lens which changes the focal length. You have to force the eye to vary the focal length often, in particular it mustn't be accommodated all time. To be accommodated means, that the eye is focusing a near object.For example: The eye will have a maximum distance of two inches to the screen. The musculus ciliaris will therefore be maximum tensed. No matter how far away an object will seem do be (because of using 3D-illustration) the musculus ciliaris is not affected if the object is only two inches distant. How can we solve this problem? We can change the focal length with a +diopter lens that is able to change it's strength. The more far away an object should be, the stronger the lens has to be, too.
If you implement this feature (it's development will of course cost a lot), you can prevent many people from losing their eyesight and from having to buy expensive correction glasses.
If the eyes focus on a near object (→ 2b+2a) and the light is permanently relatively dark (1.) myopia will appear for sure in many people.
Excuse me for my partly bad understandable English. If something is not clear enough, don't hesitate to ask me!
Your customers will be very very grateful to you (maybe you should advertise it, otherwise they will not know, you saved them from myopia)