Has anyone experienced floating lights in the peripherals of their eyes?

from time to time, a light will float from 3 oclock to 6 oclock in my right eye, or from 12 to 3. less often the same things happen in my right eye from 12 to 9 and 9 to 6. Also, i sometimes see hundreds of tiny dots floating around in bright spaces. has anyone else had similar experiences? am i crazy?
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