This was at the Gailey Eye Clinic, which has offices in northern Illinois. They have ophthalmologists and do eye surgery, but I was seen by an optometrist. I would expect that Gailey's fees to be higher than, say, Walmart.
The eye exam was $563 which included $318 for Fundus photography, which required dilation of my pupils. Medicare paid it all except for $41 for refraction.
The glasses themselves (one pair) were $436 (I used my old frames). The lenses were polycarbonate, bifocals, progressive, with Crizal Avance coatings (UV and anti-reflective). Medicare pays nothing for the glasses themselves.
So, my total out-the-door cost was $41 + $436 = $477.