Visual-Motor Integration: (also known as eye-hand coordination) refers to our ability to visualize a physical task and then execute that task using the motor system.  However, it’s actually a little more complicated than that.  During the process of performing the motor task, the brain uses visual input to constantly adjust the motor movements. Think about writing.  As you make the letters, you use your eyes to help you determine whether you’re writing slopes up or downhill, whether you are staying between the lines, and whether the letters and words are appropriately spaced.  The brain also integrates that information with motor feedback such as how hard you’re pressing on your pen and how the pen glides across the page.

Visual-Auditory Integration: refers to how your eyes and ears work together.  Usually, when you hear a sound, your eyes will move towards the direction of the location to first locate where it is coming from and then identify what is making the sound.  Visual-auditory integration is very important to reading where children have to sound out an unfamiliar word when reading.

Visual-Vestibular Integration: refers to how your visual system interacts with your balance system.  When these systems are not well integrated, people tend to have trouble with car or motion sickness, balance, going up and down stairs, and walking in a straight line.