Lazy eye or amblyopia, is an eye condition in the early stage. It describes as one eye does not develop as the other one due to an imbalance in the eye muscles. In other words, a child with lazy eye could not be able to focus properly with one of their eyes, and it could not receive clear image as the other eye does. When the child has lazy eye, he/she would have blurred and double vision, and poor depth perception of vision. At the same time, his/her eyes could not work together, also has a squint in a direction. Hence, they usually be treated by wearing eye patch for 3 to 4 hours each day and continuous do that for two to three weeks.