Amblyopia is a visual condition characterised by reduced vision in one eye, despite the absence of any structural abnormalities or eye disease. The brain and the eye fail to work together properly, causing the brain to favour the stronger eye over the weaker one. Because of the lack of a physical problem, the symptoms are hard to discern. Amblyopia when caught early on is easily treatable by means of exercises such as patching or more complex exercise treatments such as orthoptek (which work on the neuronal pathways). Parents may notice an eye misalignment (of the lazy eye). Also, if the child becomes fussy when one eye is covered, this can indicate that they have amblyopia. A simple eye exam can help identify this condition early on.