Have had this test done by the Canadian military prior to Air Force selection, it's a standard test. Just more in-depth than the usual "read me the eye chart you've memorized"! It is not invasive. Just dilates the pupils temporarily to allow closer inspection of the cornea. Much as I hate having "new" requirements relentlessly added to our tasks, I can't regard having my eyes examined by an opthomologist as opposed to a GP as a negative thing. Early detection of things like glaucoma can save your eyesight, and in a country and profession where we are bombarded by UV...