According to this article, your risk of diabetic retinopathy is lowered if you are CPAP-compliant. Presumably, this also applies to the other methods of controlling sleep apnea.
Even, if you do not test positive for diabetes, it still makes sense to make sure that your SA is well controlled. OSA is already linked to vision problems, at least via Glaucoma.
Link ===> http://montana-ledger.com/positive-airw ... 27/369711/