[tjmc]

Building a VR contact lens is orders of magnitude harder than this. Key challenges would be:

1. Component size.

2. Power. The glucose monitor is similar to an RFID that can be powered by radio waves. Driving a screen or laser would require much more power. So you'd probably need some sort of inductive coil matched to regular eyewear.

3. Focus. You can't at that distance. So you'd probably have to beam an image directly onto the retina with a laser.

4. Occlusion of the pupil. Really hard to avoid this one. You might have to pair with a camera to add sight back as a feed. However there could be benefits with this too - eg. night vision

5. Health. Beaming power could be a cancer risk. Also contact lenses need to breath to prevent corneal neovascularization and other nasty effects of hypoxia. Modern contacts are gas permeable but adding electronics would hinder the flow.

[prawn]

What's a more likely next best bet? Goggles with projectors? Or something tapping straight into the brain?