It really does depend on the experience of the person examining you.
I've been wearing contacts for over 20 years and never had a problem, and I go to same independent opticians as I always have.
About 18 months ago a new optometrist began working there and straight away he is concerned over the health of my eyes and the possible onset of diabetes. He got me an emergency appointment with my GP, which resulted in.... an all clear.
Since the new year I've been back for check ups with regard to dry eyes (that's 5 visits in 4 months, as opposed to my normal 1 in every 3 months), and a referral to the emergency eye department at hospital. Before I see the ophthalmologist, one of the nurses cannot fathom why my optometrist is wasting their time for dry eyes, and duly acknowledges that it isn't my fault (phew!).
So I get checked by the doctor who says, surprise surprise, there is nothing unusually wrong with my eyes, just a small amount of dryness.
Guess who'll be looking at alternative opticians very soon....