When you’re referring to the actual color of your eyes, you don’t need to use los before eyes. But let’s say, you get something in you eye that makes it a little red, or you cry a lot, or laugh a lot and someone asked you what happens with your eyes... you say, tengo los ojos rojos
Mi maestro pensó
Mi maestro y yo preferimos
Los estudiantes no mienten
Juanito pide
Yo defendi
