Below is an instruction from Human. Write a response.
    ### Instruction:
    What is (are) Eye Movement Disorders ?
    ### Response:
    When you look at an object, you're using several muscles to move both eyes to focus on it. If you have a problem with the muscles, the eyes don't work properly.    There are many kinds of eye movement disorders. Two common ones are       - Strabismus - a disorder in which the two eyes don't line up in the same direction.
    