Dear Madhav and Matthew,
first, thank you for alerting me to my "touching" connotation blunder, and second, yes, blinding - especially of pretenders to the throne - was certainly not uncommon. To the references already given by you to Ottoman and Mughal practices we
can furthermore add Humayun’s blinding of his brother Mirza Kamran and
Jahangir’s blinding of his first son Khusrau by using the needle (in
1607). In this context it is perhaps interesting to note that what Śrīvara has reported dates only from Sultanate Kashmir of the 15th century. To my knowledge no earlier occurrences are documented in the Rājataṅgiṇīs. Should we regard
the practice of blinding with the needle an Islamic import? How does this technique conform to the Sanskrit notion of utpāṭana ("tearing out"). This is why I was asking for evidence of techniques from other and ideally pre-Islamic sources.
Thanks again,
Walter