I can echo what the others have said. I had -4.25 in the Left Eye (OS), and -4.00 in the right eye (OD). Like most near sighted folks, I have 20/400 vision because once something gets few feet away - it gets fuzzy You shouldn't have any problems whatsoever - and you are joining the avation community - the most professional warfare community in the Navy. One option avaialbe to folks that wasn't around when I went through is corrective surgery - Radial Keratotomy used to be the prferred method but newer and better surgery types as LASIK and PPK are now much more common.I NEED TO STRESS THAT YOU DEFINTELY NEED TO CHECK WITH NAVY MED TYPES BEFORE UNDERGOING ANY TYPE OF CORRECTIVE EYE SURGERY TO INSURE THAST IT DOESN'T AFFECT YOUR ELIGILIIITY TO BECOME A SNFO!
THe following is off topic but is provided as a public service message. Sadly for me I got the NAMI Whammy for a Sinus Issue. I tried to go Avation Engineering Duty Officer, Intelligence, Supply Corps, Crypto, CEC (Civil Engineering Corps) - anything except the for the least desirable and most unprofessional warfare community -

Surface Warfare. If you do get attrited for medical reasons, do your best to stay away from the SWO Community - as a SNFO/SNP you have been used to working with dedicated, squared away professionals - that won't be the case with the Surface Navy - the only time these guys ever pat you on the back is to find a soft spot to slip in the knife - plus being an avation attrite for any reason will get you:icon_rage shit on big time. You would be much better off to get out of the Navy and find professional civilian job where you won't have to be ashamed of what you do for a living!