Cakradatta (Cikitsasangraha) 58.201

58.201

38arma tu chedanīyaṃ syātkṛṣṇāprāptaṃ bhavedyadā .
baḍiśāviddhamunnamya tribhāgaṃ cātra varjayet .. 201 ..

Pterygium, however, should be excised when it has reached the black part [of the eye]; / having raised it pierced with a hook, one should avoid a third part of it here.