Can i use onion +ginger juice drops in my eye. i have read somewhere it is antiseptic and keeps eyes fresh and filters out impurities in forms of tear?

Not a good idea: These are eye irritants. They certainly will help flush out the eyes by producing excess tears. But your natural tears are wonderfully capable of cleaning out your eyes without this kind of help. There is a lot of ridiculous information that is published on web sites and magazines - most of which can be ignored and some even harmful.