Hello There is no confirmatory test for floaters. Sometimes these floaters are seen during routine fundus examination

Floaters are the condensation of the fibrils of vitreous gel and are usually nonpathological and in routine examination can't be detected easily. Till they are in excess or there is some underlying pathology. If they are visible to an ophthalmologist by distant direct ophthalmoscopy then we may proceed to detect the underlying cause. That depend on other sign and symptoms. If you have floaters please consult a retina specialist and he will examine your retina in detail. And if it is found to be normal then you need not to worry. You will have to learn to omit them. Anxiety will not solve the problem  .have faith in your doctors.