I woke up the other day seeing a tint of yellow on everything. I noticed it because I woke up looking at my son, and I thought something was on his arm, but then I realized I saw it everywhere. Then, just as I was trying to figure out what it was, it went away, and I realized it was my vision, not a mess my kids had made. I am a healthy 32 year old male with no medical conditions or allergies.