Hi corasaurus,
I'm sorry to hear that you're suffering sight complications as a result of your diabetes control - and especially in one so young.
You are very brave in revealing your symptoms - and the reasons for them... you are not alone or the first diabetic to fall into the cycle of skipping injections, cheating their Blood Glucose results and so on: I went through the same process during my teens.
I hope that your eye problems have been caught early enough to stabilise them and potentially undo some of the damage that has already occurred - your age, and the advances in diabetes and dietary knowledge and the technology are on your side - keep up your efforts to improve your balance and control.
I hope that all diabetics take note of corasaurus' advice and work together with parents, partners and friends to stay on the right track... as she says (and I also can testify), "it is not worth it in the end."
Best wishes to you all,
Conrad