21 printable or digital projects for students to search online for information about the eyes and vision: color-blindness, how blind people read and write, why eyes are different colors, how our brain decodes optical illusions, why we wear sunglasses, which animals see long distance, how aging affects vision, and more, how word order affects how we read, how the brain sees things, how your eyes work, what causes blindness, what blind people see in their dreams, staring, why selfies are so popu