600 +
I was US Army and about 600 NVG hours when my neck went. Herniated disk in my C5. I was in Germany and was sent to a specialized Clinic who did a wonderful job and actually replaced the disk. Doc said if I was in the US I would have gotten the vertabrae fused, which would limit mobility. With the disk replacement I have never had any trouble. VA gave me partial disability upon retirement. I am flying now and using NVG's and have never had a hint of neck pain since.