its shiner he gathered, i told you rafael is fiesty one, he probably snuck out to go fight crime, came across a dude he couldnt handle and managed to get away with barely his life.

or you can just read this:

One of the most common causes for turtles to have swollen, puffy, closed or red eyes, is related to water quality. In some species, a high concentration to chlorine can cause them to have adverse reactions. Typically, this is confined to keeping the eyes closed, some rubbing of the eyes and maybe some twitching of the head. This usually goes away within a few hours if left alone. If you notice that your turtle does have a reaction to chlorinated water, either dechlorinate the water before placing the turtle in the water, or let the water stand for about 24 hours before introducing the turtle.

If the turtle is having a reaction to water quality, then the first thing you are going to need to look at is your filtration. The filter might be clogged or is unable to meet the demands and a larger or otherwise better filter may be needed to assist in improving the quality of the water. Frequent water changes would benefit your turtle and would assist you in determining if this is indeed the problem.

Vitamin A deficiency is another common problem. If your turtle is not eating a varied diet which is rich in vitamins or is not being offered a supplement, then this may very well be the problem your turtle is having.

If your turtle has an infection of the eyes, then prompt attention is needed. Keep in mind that not all eye infections are actually problems within the eye itself. It may also be in an infection within the body and is simply manifesting itself in the eyes in the appearance of swelling.