I have this moving ball/bead/orb of light that moves up or down in my peripheral vision in both eyes. No simulation and seems to happen at random, some days more than the other. Retinal specialist who examined me 10 days ago said eyes and nerves looked good no issues. Could it be dry eyes? or computer vision related? or neurological? This has been happening for 3-4 weeks a lot more and very rarely since the past 9 months.