I rate the frame and the lenses as :
near mint, excellent, very good or good condition. Ratings are subjective, I do
my best :)
Near mint condition : These look new, you must look closely to find flaws
Excellent condition : Very light usage marks on the frame or lenses. They do
not affect vision.
Very good condition : Some usage marks, nothing serious. Lenses will have some
light scratches that do not affect vision in a significant way. Meticulous
owners will probably want to change the lenses.
Good condition : Obvious usage marks on the frame but nothing is broken.
Lenses are scratched but are usable. Meticulous owners will probably not be
happy with these.