Unbreakable spectacles?


My 13 year old son has autism. He keeps breaking his glasses when angry or frustrated. He can tell us that it's not because he doesn't like the glasses (he likes them and knows he gets headaches without them) but because it's so satisfying to break them when he is angry. 7 pairs since Christmas - roughly one a month, and given that there is a gap inbetween as we make appointments, wait for the frames to be made etc, they can't be lasting longer than two weeks. He absolutely hates going to Specsavers because of the bright lights, noise, physical proximity of people etc. (We have learnt the quieter times to go)

Can anyone recommend a good brand of unbreakable glasses? The last ones to break were 'ultraflex'

Thank you so much.