have something done explanation

Needs after lockdown:

How often do you have your hair cut?

https://i.pinimg.com/236x/f6/6b/7d/f66b7d53e6e9d9ecbe999ee19d7f751c.jpg

When was the last time you have your eyes tested?

https://i.pinimg.com/236x/15/f3/d5/15f3d5bd431758fe847c36d8a7a7548c.jpg

Do you prefer to buy clothes from shops or have them delivered?

Source

We use the causative to talk about arranging for s.o else to do something for/to us.

HAVE/GET +object+past participle

My windows are dirty (clean)

You should have/get them cleaned / I must have my windows cleaned

The sink is blocked (unblock)

His jacket is dirty (dry clean)

My computer is broken(fix)

I hate going food shopping (deliver)

I can´t see very well (Your eyes/test)