Here's the requirement:
At least 20/400 or 20/200 vision corrected to 20/20 with eyeglasses or contact lenses. Depth perception and color blindness is also tested.
From here:
https://www.usmc.net/enlisted_requirements/
Of course USMC aviation may have somewhat different requirements. Also, these are for enlisted bt I don't think officer requirements are any different.
Is your uncorrected vision worse than the above which may be the cause? Otherwise, as I understand it 20/15 is better than 20/20 but then I only play a doctor on TV.
Waivers are granted by the commissioning authority, so USNA and NROTC (any option) may do different things regarding waivers. I seem to recall reading on a recent thread that there are no vision waivers for NROTC, only for USNA, but that may just be my feeble and confused memory.
EDIT: On further researching the threads the hard and fast 'no' for NROTC was color vision, so it should not apply in your case.
EDIT: What does DoDMERB have as your vision? Perhaps there was a numeric transposition or something. Perhaps worthwhile to contact your DoDMERB technician.