If this is something new after your accident, you need to get further testing. Since this is related to your eye, your best bet is to start with an eye doctor at this point. They may be able to tell what is going on, since they have the equipment for visualization to the eye.
Here is an excellent site that explains what to watch for immediately and what to watch for on a delay reaction along with at what point to seek medical attention when a concussion has occurred.
read here
Hope this helps, If you need anything else please feel free to ask. If you found this helpful don’t forget to click the *accept* button!