I had Cataract surgery many years ago. One thing I remember is that a nurse administered a heavy-duty drip(seems like too much sodium or similar). Surgery went on very well , however after the surgery I developed 'tremor/shaking' on both my head and hands. It's a very reputable Hospital with very renowned eye-surgeon in this region where I live. However, the nurse was rude and loud. I didn't say any to the Hospital, but it was a quite disappointed experience, even though the Eye-Surgeon did very well on my right eye without any complications to this day.
My Neurologist fixed that with a medication afterwards, but be careful prior to the surgery.