Short answer: Yes. Absolutely yes.
Long answer: I have Keratoconus, which means my cornea has uneven thickness across its surface, which causes bubbles in my cornea, creating a very uneven prescription across my eye. The contacts I use are called “scleral” lenses, which use a liquid-filled void to nullify my actual cornea shape, creating a new cornea. They are expensive, require specialized training to adjust, and nailing down a prescription involves doing adjustments with them in, and working backwards to figure out the proper prescription.
My optometrist worked on my prescription for around 6 months solid, going through around 12 pairs of $250 (per lens) contacts on their dime.
So, yeah. A good optometrist is fantastic, and does a ton for you.