"Removal of stitches"

My teenage child attended their appointment to have a wound check. On the doctor's clearance a nurse took us to remove the stitches and although she seemed very nice, the problem was it appeared she couldn't see what she was doing. 

It seemed the nurse could not see the stitches in my child's leg and instead was incredibly rough and inaccurate with the tweezers and the scalpel. My child was wincing and crying in pain and had begun involuntarily trembling, but was told to lay back and not look if it was bothering my child and to sit still so she could do her job properly. 

This nurse opened up a fair bit of healed tissue and the stitch sites were also bleeding. The nurse also left several stitches in the leg and began to prepare for redress. I had to ask if they were supposed to stay or should be removed also. My child had to indicate for her to stop because she continued grabbing at good skin and cutting wound tissue. I had to get out of my seat and physically show her each stitch to remove. Not sure why she doesn't wear glasses and not sure how a nurse who I believe has impaired vision can be trusted with scalpels in a hospital.