Hello Floaters are nothing but shadows. As shadows are formed only in light and shadows are faint in dim light... similarly, floaters are not seen clearly in dim light. I hope this answers your query

  floaters are usually nonpathological.please learn to omit them but get your fundus examination done so as to exclude any retinal problem Dry eye increases the problem As you are a regular computer user hence you are likely to develop computer vision syndrome for which put some lubricant eye drops eg teardrops 3to 4times daily and ocupol.dx eye oint to be rubbed twice daily on lids and take some antioxidants cap once daily