Ashtangasamgraha 14.42

14.42

aśuklaromābahulamasaṃsṛṣṭaṃ mitho navam |

anagnidagdhajaṃ sādhyaṃ śvitraṃ varjyamato 'nyathā ||

vedanopaśamaṃ snehapānāsṛksrāvaṇādibhiḥ |

kuryāt bībhatsatāṃ jetuṃ śukratvotsedhasādhanam ||

Without white hair, thin, not joined with one another, fresh,
and not born of a fire burn, śvitra is curable; otherwise it is to be avoided.
One should bring about relief of pain through the drinking of unctuous substances, bloodletting, and the like;
to conquer unsightly appearance, [one should use] the treatment for thickness and elevation in corneal opacity.