M.B.
The side effects of the desmopressin can be related to dosage, so it might be worth another try. I really sympathize with your poor daughter as I had that issue (nighttime) until 10 and still have an issue with frequent urination due to low values of ADH (anti-diuretic hormone/also called vasopressin) and I have high osmolality (indicating dehydration) and low salt. What I do that helps some is to drink water with electrolytes to decrease the osmolality and increase the sodium - at least a liter of that water a day. Note, that in healthy people that high osmolality is supposed to increase the ADH. But if you have that high and ADH low, then there's a more serious issue (mine is with my hypothalamus, which was damaged by exposure to mold toxins).
Anyways, the issue your daughter likely has is the low ADH, so she cannot physically hold onto the urine. When that number is low, the kidneys are "programmed" to get rid of water just about as fast as it gets added. The doctor told me I was likely 2 quarts low on fluids most of the time (why the electrolyte water helps and might be related to your daughters eye problem).
Another thing to consider is foods that might aggravate the bladder. Dairy is a common culprit, so you might try removing dairy from her diet. In hindsight, that likely contributed to my nighttime wetting as a child. Due to my problems with dairy that I didn't learn about until I was 33, I never gave dairy to my boys until they were older and they were both dry at nite at 3.
But, if the removing dairy recommendation doesn't work, you really need to get your daughter to the doctor - this really is a medical issue and not something that will resolve with any of these bedwetting devices, etc., particularly given it's a daytime problem too. And, most of all, please tell your daughter this isn't her fault - it's just her body isn't working quite like it should. In my experience, this problem can have a huge impact on self esteem if not handled properly.