I would say take him to a vet,if it is an infection he will need antibiotics.

First, more info., the better. : )

How much soaking have you done and what is the humidity sitting at currently? What substrate are you using?

There are pictures of his eyes up now.

Loudmetal, a vet trip is planned soon, but there is only one vet in my area who deals with herps, and they're currently out of the country. From there, the closest is Chicago, about two hours drive.

bka mama, I haven't been soaking him. He spends quite a bit of time mostly in his bowl, particularly when he sleeps, so I haven't felt the need. For a substrate, I use Repti-Bark, which I clean and replace every week (his water bowl I clean every other day) because I've been concerned that it might potentially be an infection. Humidity I've kept above 80%, temperature between about 75-80. I experimented with lowering the temperature to around a constant 70 when I saw him staying in his bowl, but he buried himself on top of his UTH, so I put it back.

The shed process encompasses more than a few days... and what happens / the conditions leading up to an actual shed determines how the shed comes off... If you've only had him a month, and as you said he shed in that time, I wouldn't count that as being a shed that even had the potential to fix what has been months worth of improper care. Now that he is having his needs better met, the next shed will bring a better chance for some of those eye caps to come off. I've seen worse... took in a rescue years back where the eyes were white... we thought he was likely blind, but after multiple soakings, when his next shed came, I was there when it began and he also had injuries from rat bites, so the shed would tear when it got to those points. Anyway, I assisted by the eye... slowly rubbing across the face and then the eyes, and low and behold I had a big chunk of eyecaps come off... and there was eye movement below. : ) The eyes were cloudy for awhile, but with time cleared. 

For now, I think I would switch him to a paper substrate so you can keep a better eye on him... make sure there aren't mites, for example, since he's soaking. I wouldn't recommend dropping the temps. He is soaking for a reason... whether it's due to dehydration, the shed cycle or mites. Rule out the mites, and then keep him with proper husbandry. Often proper husbandry is all that's needed to get ones that have come from such poor conditions back on track. I wouldn't get too aggressive with dealing with the eye caps just yet...

Also, if you have any doubt about what is proper husbandry for your Rainbow, please describe your set-up... temps, etc. People will help you out here.

I'm with Sonja. you might need another shed cycle for it to clear. it does look like several layers of retained eyecap.

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