Eye diseases not to be treated with the knife

Twelve eye diseases, among them pishtaka, arjuna, dhumadarshi, shukti, aklinna vartma, kapha- and pitta-vidagdha drishti, shushkakshipaka, shukla, amladhyushita, praklinna vartma and balasagrathita, are to be treated by a skilled physician with suitable medicines and not with surgery; the two external diseases are also to be calmed with medicines only.