It's interesting that glasses, sitting in the middle of your face are seen as less of an issue than hearing aids. It's really just a random whim of fashion.
I think this may change soon. It will almost certainly change if a device targeting non-impaired gets any traction.
I'm not so sure that it's a simple matter of fashion.
Wearing glasses is, for lack of a better term, 'normal'. I don't know the statistics but probably a quarter of the population has impaired sight (I'm one of them). Additionally in the majority of cases it presents no handicap at all once corrected - often it results in acuity above the average.
I think this may change soon. It will almost certainly change if a device targeting non-impaired gets any traction.