I get "dust" like particles floating across my vision, is this serious?
Qualified optometrist Simon Kay BSc(Hons) MCOptom answers this question.
They are floaters and almost always harmless. If they are long standing and in both eyes you need not worry. To find out more enter 'floaters' in the search box in Ask the Optician and you will see lots more questions and answers.
For more information about floaters, see our video below: