If he happens to make an appearance go ahead and offer him food. (Place it close enough for him to smell it) These babies will usually eat even when opaque but are just a little more nervous and shy. Understandable because they can't see a dang thing when their eyes are cloudy.

Opaque phase can last a few days. Then one day, you will see his eyes go clear again, but he still won't look bright. That's when he's about to shed. Could be a day or three after his eyes go clear again, then he'll shed.