I have a 3 year old tort who also "eats air"...

It is very small in overall size for its age, I have had this tort from an egg, so I have watched/studied it for some time...In my opinion, my tort is either partially sighted, or blind.
At first, I confess to helping the tort eat/drink, but that was short lived. Torts have a great sense of smell, so he goes about his business by himself, although I do make sure he has adequate time for hydration/baths...T.T.

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Weeds...There free ya know!!!

Didn't wanna admit it to myself but I think your rite..my tort is also in need of a gud pair of specks or is blind,gunna get a second opinion from a vet and see were we go from there.