Castor oil is a bit more than just a myth, it contains mainly ricinoleic acid (about 90%) which specifically activates the EP3 prostanoid receptor for prostaglandin E2.
https://en.wikipedia...Ricinoleic_acid
PGE2 is quite interesting.
https://en.wikipedia...rostaglandin_E2
And it is actually very related to hair growth, eyelashes included.
Directly in the eye is probably the best thing ever for dry eyes, there are reports of improved sight and dissolving cataracts.
It seems best to avoid the black Jamaican kind for eyes treatments.
Hydrogen water looks promising too as eye drops in saline, oral and topical (compresses on eyelids) because of its specific antioxidant proprieties, at this stage probably safer than C60oo.