hi thanks for choosing hcm complications in diabetic patients are always expected thing is,the day you werediagnosed to be diabetic,you need to take good diet,medication and exercise along with FREQUENT BLOOD GLUCOSE MONITORING,Hba1c every 3 to 5 months eye examination,scan ,ecg every year have you been to an opthal doctor since you turned out to be diabetic? if not this is the right time to see an eye doctor if your glucose levels on an average is ok you may not need a change in medication glaucoma of the eye may result in symptoms you have mentioned...you should see a doctor to clarify your problem being diabetic you are prone to cataracts ,glaucoma,retinopathies etc dont panic reading all the above complications.... i have mentioned them for you to make you know what you may have to go through if you neglect your eyes precautions in case of eyes 1. good sleep pattern,go to bed and rise same time everyday 2.get your sight checked once in 6 months 3.change your spects if they seem old 4.wash your eyes with normal clean chemical free water 5.avoid finger and nail contact with eyes all the best take proper care feel free to contact me for further queries thank you