If yes, then you'd need 1 of our 2 light harnesses, not 2 of our single light harnesses. We don't want to have to increase the price of all our lights to cover including a wiring harness in every light, and we don't want you to have to pay more for something you don't need.
By far the most common cause of this type of pain, especially if it is occurring in both eye, is simply strain of the eye muscles. This is especially common in people who work at a computer screen all day or perform other task that require careful use of their eyes.
Normally, the eyes move in concert (ie when left eye moves left, right eye moves in same direction to a similar degree). The brain takes the input from each eye and puts it together to form a single image. This coordinated movement depends on 6 extra ocular muscles that insert around the eye balls and allow them to move in all directions.