It is applied as a collyrium in the eyes. It is very sharp and drains our the kapham, and strengthens the eyes. Used regularly it should prevent cataract.
(In the village they tell me how in the past such sharp (theeksnam) plant extracts used to be used to address conjunctivitis and 'jannu' and other conditions ... and how thereby those days people never had a cataract problem.
The parallels between village medicines and theory and ayurveda plays out like a symphony)