Anandakanda 2.1.282

2.1.282

śītaṃ nīlāñjanaṃ proktaṃ kaṭutiktakaṣāyakam /
cakṣuṣyaṃ kaphavātaghnaṃ viṣaghnaṃ ca rasāyanam //

Nīlāñjana is declared to be cooling, pungent, bitter, and astringent;
It is beneficial for the eyes, destroys kapha humor and vāta humor, counteracts poison, and is a rejuvenation therapy.