No, I haven't seen her yet due to work. Soon!In cats, cataracts from diabetes is actually pretty rare. Usually it's genetic or an injury of some type. Has the new vet had a chance to look at his eyes yet?
It is hard to advise without seeing several days of data to get a feel for what is happening.
Have you read over the ProZinc protocol?.
A really important point: insulin doses are adjusted based on the nadir, the lowest glucose post-shot. They are NOT increased based on the pre-shot levels. The nadir for ProZinc is usually between +5 to +7 hours after the shot.
You don't need to test the cat every hour.
Test at pre-shot to make sure it is safe; for new insulin or new members, 200 mg/dL is the cut off until you have some data to show it is safe to shoot lower.
When you can, to see how the insulin is working, try to get nadir period test. Weekend, a day off, or if the schedule is really screwy, set the alarm for some time at night.
Nadirs do vary day to day; the idea is to make sure he isn't going too low (below 50 mg/dL on a human meter; 68 mg/dL on an AlphaTrak)