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Does it change the shape and how objects are seen or does it just stop you from seeing certain things?

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  • $\begingroup$ Needs clarification: what is "it"? "changing light"? What do you mean by "changing light"? $\endgroup$ – mgkrebbs Oct 8 '18 at 1:29
  • $\begingroup$ Now that I reread it its really poorly writen. I'm guess I'm talking about light manipulation. How can manipulating light change how you see. Like changing how much light get in the eye changing the angle. Will these manipulation change how we see and how? Will it just stop us from seeing and nothing more or is that some how linked to hallucinations? $\endgroup$ – DeusIIXII Oct 8 '18 at 1:55
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I'm interpreting your question to be: "How much can changing the light entering the eye change the shape of/how objects are seen? Would manipulating that light just stop you from seeing certain things?"

Manipulating the light entering the eye is the exact premise of a virtual retinal display (VRD):

From Wikipedia – A VRD is a display technology that draws a raster display (like a television) directly onto the retina of the eye. The user sees what appears to be a conventional display floating in space in front of them.

Google Glass and other technologies (virtual reality headsets, heads-up displays) operate through relatively similar projection mechanisms. Light defines everything the eye sees (outside of hallucinations, and even those can be induced by flickering light). Also, the way your brain processes visual information (photons received by your eyes) can be "tricked," which is discussed in this BBC article. Finally, your brain's ability to process visual information can be altered by external forces (e.g. drugs, motion, or even strong magnetic fields).

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  • $\begingroup$ Thanks also for the link to other information. This is exactly what I was looking for. Sorry for the bad explanation. $\endgroup$ – DeusIIXII Oct 9 '18 at 22:28

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