Just wanting to point out that visual impairment is a scale.

Very few people can't actually see anything, and so you are choosing your level of visual impairment as 'not blind' but someone else's at 'blind'. Someone else may put that line in a different place.

Fitting something not binary to a binary scale is hard.

One thing that we can all agree on is that they have some issue with their sight, e.g. some visual impairment.