Marco Leon writes:

I was at 1,700 feet. I used the Garmin 496 to mark the spot so it
conveniently took note of the time and altitude as well. Switching it to the
Automotive mode, I was able to narrow it down to a 6 block by two block area
in a specific neighborhood in Connecticut.

I'm not optimistic about finding the culprit.

There was definitely a flash and I lost my nightvision in the left eye for a
little while which was a weird feeling. It was kind of like wearing glasses
with a bug smudge on the left lense.

Did you see an ophthalmologist?