Well I am quite sure it was for first class medical.
Anyway I am a pilot with FAA ATPL. I have 2 diopters of astigmatism in left and 1.25 in right. I am just concerned what would happen if I would exceed 3 diopters. I am 30 years old and should be fairly stable but the 3.0 diopter is not far away though.
This is the bad thing about being a pilot.