Maybe, maybe not (I'm not a doctor and don't want to speculate) but they would absolutely write a letter to document/certify a visual disability and describe potential accommodations that might be used.

That is prima facia absurdity. It's like saying "no doctor would just prescribe pain killers without checking for addiction signs", yet it happens all the time. There is a phrase for it - doctor shopping. How hard is it to believe some techie doctor would allow, or formalize a guy doing potentially important research on himself, particularly if it is presented well by a competent scientist.

I should clarify: no doctor that wants to keep his license would prescribe this device. Doctors can (and do, when caught) lose their licenses (temporarily or permanently) if they get caught prescribing drugs for off-label purposes.

Documenting a medical condition which could be addressed by the use of the device is a very separate issue for medical and legal purposes.