We have a super long day ahead of us. It begins with early morning bloodwork and getting the kids ready to spend the day at my parents house. While the boys are at my parents house, the rest of us will spending the day at the Cleveland Clinic. Gavin has a long day of testing at the afore mentioned Cleveland Clinic. The purpose of this testing is to rule out and or discover the cause of Gavin's vision problems. For awhile now, Gavin's been experiencing periods of time where his vision goes completely black, like someone turned out the lights. We have been unable to determine the cause of these episodes and our goal for today is to at least rule a few things out. There are two areas of…