I can't remember if I was told not to wash my hair for a while, but I got eye-shields which I taped over the operated eye [using special gentle tape of course] and used those till I felt comfortable.
3M Opticlude Standard Orthoptic Eye Patches - Box of 20 – Medisave UK
they say they are for children but I found the size just right.
They also come in boxes of 10, which should be enough.
I think I also covered my eye at night, again of my own volition, for a few nights, until I felt braver.
I was told to uncover my eye the day after surgery, to speed up recovery, but I see some online advice that says cover it for a week? Obviously different schools of thought.
It felt a bit scary taking the first dressing off, but my eyes felt 100% fine, and my improved sight was immediately obvious as soon as I took the dressing off the day after the op.
BTW I had sedation because of other conditions, most people don't need it.