Folks,
Here are the standards from the NAMI guide. If you look for these on the site, make sure you go to the exams section, not the Aeromedical Waiver Guide. The numbers in the decreased visual acuity (DVA) section of the Waiver Guide are for personnel already designated. Us wannabes need to look under the SNA requirements section of the exams pages. Anyway, here goes:
DVA
20/40 (minus zero) on Goodlite chart, each eye, corrected to 20/20 minus (zero) or better each eye. If uncorrected vision is less than 20/20 each eye the correction must be worn while flying
REFRACTION
edited May 01
(Cycloplegic) Myopia no more than -1.50 any meridian. Hyperopia no more than +3.00 any meridian. Astigmatism no greater than -1.00 cylinder. Both cycloplegic and manifest refraction must be recorded. The same refractive error standards apply to both examinations. Avoid overcorrection--record refraction to 20/20 each eye. Refraction to best acuity may exceed standards. (see MANMED 15-65, p. 15-48)
So, unless someone knows something NAMI doesn't, it's 20/40 correctable to 20/20, as long as you also don't exceed the refraction numbers. REMEMBER: If you even think you may be close to the limits, make sure you have a cycloplegic (eyes dialated) exam, because this determines the refraction. Manifest refraction, i.e. looking at the chart on the wall w/o being dialated first, is only part of the exam they'll do for the flight phys. Been there, done that times 2.
LTJG G.