Sutrasthana 1.46 — Chapters of the Uttarasthana (Part 2)

"...sandhisitasita roga vijnaniya, sandhisitasita roga pratisedha, drstiroga vijnaniya (diagnosis of diseases of vision), timira pratisedha (treatment of diseases of lingering blindness), sarvaksirog vijnaniya, sarvaksiroga pratisedha, karnaroga vijnaniya (diagnosis of diseases of the ear), karna roga pratisedha, nasa roga vijnaniya (diagnosis of diseases of the nose), nasa roga pratisedha, mukharoga vijnaniya, mukha roga pratisedha..."

Translation: Prof. K.R. Srikantha Murthy, Ashtanga Hridayam Vol. I (Sutrasthana), Chowkhamba Krishnadas Academy, Varanasi.

Verse 46 continues the Uttarasthāna enumeration through the śālākya tantra chapters — the branch of Āyurveda devoted to diseases above the clavicle. The word śālākya derives from śalākā (a probe or rod), referring to the instruments used in ophthalmic and ENT procedures. These chapters comprise the most systematic ancient classification of eye, ear, nose, and mouth diseases in Indian medical literature.

The ophthalmic chapters are organized by anatomical location — a remarkably modern approach to classification. Dṛṣṭigata roga covers diseases of the dṛṣṭi (lens/pupil region). Vartmagata roga covers diseases of the vartma (eyelids) — including conditions that modern ophthalmology identifies as chalazion, stye, blepharitis, ptosis, entropion, and ectropion. Sandhi-sita-asita-gata roga covers diseases of the sandhi (canthi/angles of the eye), sita (sclera/white of the eye), and asita (cornea/dark portion). The classical texts describe seventy-six distinct eye diseases across these anatomical regions — a classification of remarkable specificity that includes conditions recognizable as conjunctivitis, pterygium, corneal ulcer, glaucoma, and various forms of opacity and inflammation.

Karṇaroga vijñānīya (diseases of the ear) addresses the otological conditions: pain, discharge, tinnitus, hearing loss, and infections of the external, middle, and inner ear. The Āyurvedic treatment of ear diseases includes medicated oil instillation (karṇa pūraṇa), fumigation, and specific herbal formulations. Nāsāroga vijñānīya (diseases of the nose) covers rhinological conditions including rhinitis, sinusitis, nasal polyps, and disorders of smell. The treatment relies on nasya (nasal therapy), which the Sūtrasthāna introduced as a general procedure and which the Uttarasthāna applies to specific nasal pathology.

Mukharoga vijñānīya (diseases of the mouth) covers the full spectrum of oral pathology: diseases of the lips, tongue, palate, gums, teeth, and throat. The classical texts describe sixty-five distinct oral diseases — including conditions recognizable as gingivitis, dental caries, oral ulcers, tonsillitis, and various inflammations of the oral mucosa. This chapter is the Āyurvedic counterpart to modern dentistry and oral medicine, and it includes both medical management and minor surgical procedures.

The grouping of these chapters within the śālākya tantra section reflects the Āyurvedic understanding that all organs above the clavicle share common vascular supply, nervous innervation, and therapeutic access routes. Diseases of the eye, ear, nose, and mouth are interconnected through the srotas (channels) that serve the head region. A disorder in one organ often affects the others — sinusitis can impair vision, ear infections can produce referred pain in the teeth, and nasal obstruction can alter the eye's tear drainage. The integrated chapter structure acknowledges these connections.

The systematic classification of eye, ear, nose, and mouth diseases by anatomical location is one of the most clinically advanced features of the Āyurvedic tradition, and its organization finds few parallels in the ancient world.

The Suśruta Saṃhitā's ophthalmological chapters — which the Aṣṭāṅga Hṛdayam condenses — represent the most sophisticated ancient system of eye disease classification. The seventy-six-disease classification, organized by the five anatomical maṇḍalas (zones) of the eye, anticipates the anatomical organization of modern ophthalmology textbooks. No other ancient medical tradition — not Greek, not Chinese, not Egyptian — produced as detailed and systematically organized an ophthalmic classification.

In Traditional Chinese Medicine, eye diseases are understood through the organ-meridian system rather than through anatomical location. Each part of the eye corresponds to a specific organ: the iris to the liver, the canthi to the heart, the sclera to the lungs, the pupil to the kidneys, and the eyelids to the spleen. This organ-based mapping produces different therapeutic strategies — treating the eye by treating its corresponding organ — that complement but differ from the Āyurvedic approach of treating the anatomical site directly through local application of medicines.

The Unani tradition's otological and ophthalmological chapters, drawing on Galenic anatomy and the clinical experience of Islamic physicians like Ibn Sīnā and Ali ibn Isa (whose Tadhkirat al-Kaḥḥālīn — "Notebook of the Oculists" — became the standard medieval ophthalmic reference), represent a parallel development of organ-specific diagnostic classification. The Unani tradition excelled in ophthalmic surgery and pharmacology, with contributions that were transmitted to medieval European medicine through translations.

The ancient Egyptian medical papyri (Ebers Papyrus, ca. 1550 BCE) contain treatments for eye diseases, ear infections, and dental problems, but without the systematic classification by anatomical zone that characterizes the Indian tradition. The Egyptian approach was remedy-focused rather than classification-focused: a list of conditions with their treatments, rather than a systematic taxonomy.

The śālākya tantra chapters teach a principle about the relationship between observation and classification: the more precisely you can locate a problem, the more precisely you can treat it.

The Āyurvedic classification of eye diseases by anatomical zone — eyelid, canthus, sclera, cornea, lens — transforms a vague complaint ("my eyes hurt") into a precise diagnosis ("inflammation of the medial canthus with kapha predominance"). The precision of the classification determines the precision of the treatment. A condition of the eyelid receives local treatment to the eyelid. A condition of the lens may require systemic treatment plus surgical intervention. The general category "eye disease" is clinically useless. The specific location makes it treatable.

This principle applies to any domain where diagnostic precision determines therapeutic effectiveness. "My relationship isn't working" is too vague to address. "Trust has been broken by a specific incident that has not been discussed" is specific enough to treat. "My business is struggling" is too vague. "Revenue has declined because customer acquisition cost increased while retention dropped" is specific enough to act on. The Āyurvedic emphasis on anatomical precision — classifying problems by their exact location — is a universal diagnostic discipline.

The śālākya tantra chapters are among the most directly clinically relevant sections of the Uttarasthāna for modern practitioners and patients.

Āyurvedic eye care offers preventive and supportive practices that complement modern ophthalmology. Netra prakṣālana (eye washing with triphala decoction), añjana (collyrium application), and dietary recommendations for visual health (ghee, carrots, amla) can be practiced alongside conventional eye care. In an era of screen-induced eye strain, the Āyurvedic emphasis on daily eye hygiene — cleaning, nourishing, and resting the eyes as part of the morning routine — addresses a gap that modern ophthalmology acknowledges but has no systematic protocol to fill.

The oral health chapters are equally practical. Āyurvedic oral hygiene practices — dantadhāvana (teeth cleaning with herbal twigs), jihvā nirlekhana (tongue scraping), gaṇḍūṣa (oil pulling / holding medicated oil in the mouth), and kavala (gargling with medicated decoctions) — are all described in the dinacaryā (daily routine) chapter and receive therapeutic application in the mukharoga chapter. Oil pulling with sesame or coconut oil has gained mainstream popularity and has some clinical research supporting its benefits for gingival health and reduction of oral bacteria. The classical Āyurvedic recommendation is more specific: the oil should be matched to the doṣic condition (sesame for vāta, coconut for pitta, mustard for kapha).

For ear care: karṇa pūraṇa (instillation of warm medicated oil into the ears) is a simple preventive practice recommended in the dinacaryā. A few drops of warm sesame oil in each ear provides lubrication, protects against dryness-related conditions, and supports the health of the external ear canal. This practice is particularly relevant for the modern context, where frequent earbud use and air travel create conditions of dryness and pressure change that aggravate vāta in the ear.