Try misting your enclosure a little bit and see if this helps. I had a similar problem right before my BP shed last time. I misted the enclosure and after an hour, the eyes were back to normal. If it's the humidity try moving the water dish to the warm side to raise the humidity.
Jeff
"Parents are not interested in justice, they're interested in peace and quiet."
-Bill Cosby-
def. sounds like a humidity problem, like every one else said. he also might be getting ready to shed. mist atleast 3 times a day and move the water dish to the warm side. let us know how it turns out