Assuming the home test counts for your driving licence
Licence vision certificates must come from centres accredited by the licensing authority, which file results electronically — a standard home visit is not that. People pay AED 150–400 at home, then discover they still need the approved-centre test. Use the home visit as preparation, and ask about accreditation before booking if the licence is your whole reason.
Booking separate visits for one household
The call-out cost is baked into every solo booking, so a family that books three separate visits pays the travel premium three times. Almost every vendor discounts additional people in the same visit, typically AED 80–200 each. Bundle the household, especially outside Dubai and Sharjah where travel is a bigger slice of the quote.
Skipping the licence check because the price was good
An unlicensed test is the most expensive kind: a wrong prescription means headaches and wasted glasses, and an unqualified tester can miss signs that needed a doctor. Verifying a DHA, DoH or MOHAP licence takes two minutes. Booking through a platform that verifies vendors first handles the initial filter, but asking directly costs nothing.