A 3 year old boy comes to your office for a routine check-up.  At this age you routinely check visual acuity by using a picture card, patching each eye in turn.  You discover that visual acuity, measured at 10 feet,  is 10/15 OD, and 10/45 OS.  Upon inspection of the child's eyes you see the following:

You perform a cover test, and when you cover the right eye, the left eye moves to look straight ahead.  When you cover the left eye the right eye doesn't move.