Hello well her blood Sugars are really high and she needs to be started on insulin for better control of sugar.. definitely Such high Sugars will have any impact on health like affecting her vision her nerves are causing peripheral neuropathy faster or kidney damage... coming to the diet Path I would suggest to have more of green leafy vegetables and pulses and cereals and especially avoid rice as we tend to consume it more in quantity . You can also try eating Ragi, Jowar which are low glycemic index foods..Avoid potato and beetroot...We need to monitor you to set the dose..Please consult a physician..Thank you