Some thing floating on eye surface could be as simple as mucous strand associated with dry eye
in people who work on computer for long hours. In high myopes like you floaters
are common because of vitreous degeneration. Few fine strands are of no consequence but sudden increase in floaters, a large veil should make you rush to an ophthalmologist. Try lubricating eye drops, visit an eye specialist for retina
checkup by indirect ophthalmoscope annually.