Contact Lens Strength

Can anyone convert a contact lens strength of -1.25 to a 20/20 scale? Thanks in advance.?
I'm considering joining the Air Force to become a pilot, but i dont know if my vision is good enough. Any help would be greatly appreciated.

Wore wrong contact lens strength, now my normal contacts aren't strong enough. Is this permanent damage?
Managed to lose both of my contact lenses 7.50 while on a trip. Because of my horrible vision, I had to wear someone else's lenses 6.00 in order to safely drive back.In total, I was wearing the lower strength contacts for approximately 10 hours. Upon returning home and switching back to my normal strength contacts 7.50 I've found that my vision isn't what it was before.Things near to me are clear, but if I move back a few feet things begin to get blurry, and stay that way for any distance past that. I assume that I stressed my eyes from the wrong power contacts, but now that it's been over 24 hours with my proper lenses in I still see no change for the better.Is this permanent damage, or do my eyes just need time to adjust back? And how much time? Is there anything I can do to help my eyes recover?Obviously the answer would be to consult my optometrist, but I'd like to hear from knowledgeable users before making an appointment if my vision does in fact not get better or overall consensus is that damage has occurred. Thank you.

Is -3.50 much stronger than -3.00 when it comes to contact lens strength?
I went from 3.00 to 3.50 and I was wondering how much of a difference in strength that is when it comes to contact lens prescriptions?

Are there other indications of contact lens strength other than the digits listed on the cases?
I went for an exam and my doctor told me my prescription had changed a little. Upon receiving a new set of trial lens from him, the powers of each lens were exactly the same. He said that doesn't mean anything, the prescription strength can still be different based on which contact lens is prescribed, due to the shape spherical or aspherical and the material and thickness.Is this true? If so, this is remarkable, and I think I should be trying more brands of lenses.Also a side question he told me that PureVision by Bausch and Lomb, being aspherical, can help me treat my astigmatism to a slight degree without going to toric lenses. But from their website, it seems the aspherical design is just to help improve sharpness over regular spherical lenses for I assume regular users, i.e., non astigmatic users. Is what he said true?I felt rushed the whole visit. I really want to try Air Optix but he told me to try these first for a few days. Shouldn't I be allowed to try a few types to pick what feels best and looks sharpest? I've worn lenses for ten years.