Simply dear I am telling you removal of teeth may loss your vision is a myth and a dental taboo.
There is no relation between extraction of teeth and eye vision. Both these parts are supplied by different nerves.
So you don't have to worry either .
Next Steps
just follow your dentist what he/she says.
Health Tips
As you are extremely concerned so I will suggest that
u can extract your canine from a ORAL AND MAXILLOFACIAL SURGEON.
But this does not indulge or mis judge ur current dentist.
it's just corresponded to ur concern.
keep smiling...