I've experienced this problem, the eye doc didn't seem to think anything was untoward, I didn't mention it until he had finished having a good look around; this leads me to believe that only the owner can see them.
On another matter concerning the eyes, it is a good idea to get your interoccular pressure checked to see if you are at risk of suffering glaucoma. The doc says it is impossible to cure however it is relatively easy to prevent.
All the best with the medical.