Board Thread:Metal Gear Solid V/@comment-98.183.25.16-20150918215627/@comment-109.193.182.64-20150922073357

Yes, it must have happened during the torture.

SPOILER ALERT:

If you watch the true ending in which Miller, BB and the Phantom are receiving emergency treatment, Miller turns around looking and BB, which indicates, he didn't loose his eyesight during the raid on the first mother base. So if he didn't loose it in those 9 years somehow, which I doubt, he must have been blinded during torture.