Pycnogenol is good for vision.
Benfotiamine is another.
My mom takes Dr.David Williams Blood Sugar Advantage
and her blood Sugar gets controlled by these 2 pills alone.
Please read other posts here by other and you will get the picture.
Try to give your mom Cinnamon tea. Boil Cinnamon sticks
in distilled water for sometime and give her the drink.
Lemon drink with meals also helps.
Bitter Melon tea can be purchased at Chinese Stores.
Get her baked chips. SHe is lacking minerals i think.