Max. Temperature of spot lamp
The eyes go cloudy when they're going in to shed because that's the fluid seperating the old skin from the new skin. What leaked out is probably the lubricating liquid that makes the eye cloudy. As for how it leaked out, I'm not sure. But I don't think it's anything to worry about. As Brandon said, a trip to the vet wouldn't hurt, but if he's just going into shed, it might be a bit stressful for him. All I can recommend is to remember to bump the humidity up from the usual 60% to around 80% and keep it that high until he sheds his skin. The shed process usually takes around a week. Watch for his cloudy eyes to clear up, and once they clear, expect him to shed within a few days. Keep handling and other stressful things like that to a minimum, and hold off feeding until he's done shedding. If you just got the ball, and haven't made an appointment, it might be smart to get him in for a vet check-up after the shedding. :)
Any other questions, don't hesitate to ask. And good luck with the shed. :D