Now that you know it has happened to him you might be able to prevent it next time. When you see the cloudy eyes, followed by them clearing up, then provide misting or high humidity for a few days until he sheds. Sounds like maybe conditions were just too dry. The shed should happen 1-5 days after the eyes go clear. If it's been 7 days or longer, watch out for a retained shed. After 5 days of clear eyes, I decided it had been too long. Went and examined her closely and that's when I found the problem pictured above. Caught it in time.