Netra Kriya Kalpa: The Five Classical Ayurvedic Eye Therapies of the Sushruta Samhita (Tarpana, Seka, Aschyotana, Anjana, Puta Paka)

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Netra Kriya Kalpa: Ayurveda's Science of Tending the Eye

Of all the organs the classical physician wrote about, none was held more precious than the eye. “Of all the senses,” the tradition says in effect, “sight is the dearest,” and a man who can see is counted rich though he own nothing else. It is no surprise, then, that Ayurveda devoted to the eye not just a catalogue of its diseases but a whole applied craft of caring for it — a set of hands-on procedures gathered under the beautiful name Kriya Kalpa. The words repay a moment's attention: kriya means “action, procedure, operation,” and kalpa means “preparation, method, regimen.” Together, Kriya Kalpa is the classical science of how you actually treat an eye — the preparations you make and the procedures you perform upon it.

At the heart of this craft stand five measures, often called the Pancha Kriya Kalpa, the five ocular procedures. In order of increasing intensity they are: Aschyotana, the instilling of medicated drops; Seka, a gentle continuous stream or bathing of the eye; Anjana, the application of a collyrium or medicated eye-salve; Tarpana, the “satiating” procedure in which a pool of medicated ghee is held over the eye within a little wall of dough; and Puta Paka, a more concentrated application prepared by a special bolus-cooking of medicinal flesh and drugs. From the lightest touch of a single drop to the deep, retained pool of ghee, the five form a graded ladder of care — and the classical physician chose his rung with precision.

What makes this material so absorbing to a modern reader is how procedural it is. This is not vague folklore; it is a step-by-step operating manual, complete with how to prepare the eye, how to hold the medicine in place, exactly how long to keep it there (measured, wonderfully, by counting syllables under the breath), how to read whether the procedure has gone well or badly, and how to look after the eye afterwards. To read it is to watch a careful clinical tradition at work. But a firm word of framing before we begin: everything here is offered as classical scholarship and the history of medicine. These were procedures for a trained vaidya, not a household. Nothing in this article is medical advice, and nothing in it is a thing to try at home.

The readings here are drawn from the Uttara Tantra of the Sushruta Samhita — the “later section” that houses the classical ophthalmology, where the five Kriya Kalpa measures are set out in procedural detail

The Sushruta Samhita and the Kriya Kalpa Chapter (Uttara Tantra)

The account we will follow comes from the Sushruta Samhita, the great classical compendium of Ayurvedic surgery, and specifically from its Uttara Tantra — the “later section” that gathers the specialised branches, including the whole of Shalakya Tantra, the science of the diseases of the eye, ear, nose and head. Across a run of chapters the Uttara Tantra first names and classifies the diseases of the eye — famously counting seventy-six distinct eye diseases — and then, having taught the student what can go wrong, turns to what the physician can do. That turn is the Kriya Kalpa chapter.

The chapter opens in the classical manner, as a dialogue. The teaching is placed in the mouth of Dhanvantari — the divine physician, “the sainted lord of Benares (Kashi),” revered as the fountainhead of Ayurvedic surgery — instructing his disciple, the sage Sushruta, the son of Vishvamitra. “Now we shall discourse,” the chapter begins, “on the preparations and uses of the medicinal measures to be employed in treating the affections of the eye.” And it lists them at once: Tarpana (soothing), Seka (sprinkling), Aschyotana (eye-drops), the Puta Pakas, and the Anjanas (eye-salves). What follows is the detailed working-out of each. You can read more about the parent text in our guide to the Sushruta Samhita, India's ancient surgical text, and about the wider classical eye tradition in the overview of classical Ayurvedic eye treatment.

It is worth noting that Sushruta is not alone in this. The later master Vagbhata takes up the very same five measures in the Uttara Sthana of his Ashtanga Hridaya, refining and re-ordering them; and the tradition treats Kriya Kalpa as settled, canonical knowledge. When two of the three “great” classical texts describe a procedure in close agreement, we are looking at the considered mainstream of classical Ayurvedic practice, not one author's idiosyncrasy. That is part of why these chapters carry such authority in the history of Indian medicine.

Aschyotana: The Classical Eye-Drop, the Gentlest Measure

The ladder of Kriya Kalpa begins with its lightest rung: Aschyotana, the classical eye-drop. The word means “instillation,” and the procedure is exactly what it sounds like — a few drops of a cool or lukewarm medicated liquid, a decoction or a milk-based or ghee-based preparation, let fall into the inner corner of the eye while the patient lies back with the lids gently parted. It is the most universal of the measures, the one the tradition reaches for first and most often, because it is the gentlest and carries the least risk.

Aschyotana was classically graded by the fault it addressed. For a Vata-dominant complaint the drops were made lukewarm and unctuous; for a Pitta-dominant one, cool and sweet; for a Kapha-dominant one, sharp and warm. The classical texts even count the drops and set the height from which they should fall, so that the liquid lands softly and does not strike the eye. This is the tradition's instinct throughout the eye chapters: the eye is precious and easily hurt, so every instruction bends towards gentleness and measure. Aschyotana was used at the very onset of an eye complaint, and as the everyday, low-intensity measure to soothe an irritated or tired eye — the classical first response before anything stronger was considered. The inflammatory eye conditions for which it was indicated, such as Abhishyanda (the classical “watery, congested eye”), are described in the tradition purely as subjects of study.

Aschyotana (drops) and Seka (a gentle stream) were the lightest rungs of Kriya Kalpa — a cool or lukewarm medicated liquid let fall or poured gently. Everything in the classical eye chapters bends toward softness and measure. Shown as classical scholarship, not as a home remedy

Seka: The Soothing Stream (Netra Seka)

One rung up is Seka — sometimes called Parisheka — the “sprinkling” or, more accurately, the continuous streaming of a medicated liquid over the eye. Where Aschyotana is a few drops, Seka is a steady, gentle fall of decoction poured from a small height over the closed or half-closed eye for a set period, bathing it in a soft, continuous flow. Think of it as the difference between a drip and a slow, kind shower for the eye. It was the measure for a larger, more spread-out irritation or heat, where a mere drop would not reach or last long enough.

Like Aschyotana, Seka was tuned to the dosha at fault — the temperature and the drug of the stream chosen for Vata, Pitta or Kapha — and, like every measure in these chapters, it was governed by careful rules about how long to pour, how warm the liquid, and how to keep it from striking the eye directly. The underlying logic that unites the two lightest measures is soothing and cleansing by liquid: a way of carrying a cool or medicated wash gently across the surface of a tired or inflamed eye. To a modern reader, the family resemblance to a soothing eye-bath is unmistakable — though, again, the classical versions were medical procedures, prepared and supervised, and nothing in this description is a recipe to reproduce.

Netra Tarpana: The Pool of Ghee That Nourishes the Eye

Now we come to the measure that most fascinates modern readers and that gives this whole article its name: Tarpana — often called Netra Tarpana, “the satiating of the eye.” The word tarpana means “satisfying, nourishing, satiating,” the same root as in offering water to satisfy the ancestors; and the procedure is aptly named, for its whole idea is to bathe and nourish the eye in a retained pool of medicated clarified butter (ghee). It is the signature procedure of classical Ayurvedic ophthalmology, and the Sushruta Samhita describes it with a craftsman's precision.

Here is the procedure as the classical text lays it out, read as history of medicine. Tarpana was done in the fore-noon or the after-noon, “under propitious astral combinations,” only after the patient's head and bowels had been purified and any previous meal fully digested. The patient was laid on his back in a chamber sheltered from the sun, the wind and floating dust — a still, clean, shaded room. Then came the defining step: the region around the eye was built up with a circular wall of powdered Masha (black gram) pulse, pasted with water into a stiff dough and pressed into an even, hard, compact ring enclosing the eye — a little dam, or dyke, around the socket. Into the reservoir this wall created, the physician poured the transparent upper layer of clarified butter, warmed with a little lukewarm water, filling the cavity “up to the tips of the eyelashes.” The patient then gently opened and closed the eye within the pool, so the medicated ghee bathed every surface, and simply rested, eye immersed, for a carefully measured time.

The heart of Netra Tarpana: a wall of black-gram (Masha) dough built into a ring, and a pool of transparent, lukewarm ghee held within it over the eye. The Sushruta Samhita fixes every detail — the dough wall, the clarified upper layer of ghee, the filling “up to the eyelashes.” Recorded as history of medicine, never as a home procedure

There is a quiet brilliance in the engineering of it. The problem Tarpana solves is a practical one — how do you keep a bath of liquid ghee sitting on an open eye long enough to do anything? — and the classical answer, a hand-built dough wall of black gram moulded to the face, is at once humble and ingenious. The Masha dough is sticky and firm enough to hold a seal against the skin, and neutral enough not to irritate. It is the kind of solution that could only come from a tradition that had actually done the procedure, many times, and refined it at the bedside. Tarpana sits at the nourishing, brimhana (strengthening) end of the Kriya Kalpa ladder: where drops and streams cleanse and soothe, the retained ghee-pool was meant to deeply nourish a dry, strained or weakened eye.

The Matra of Tarpana: How Long the Ghee Was Held

If one detail captures the character of these chapters, it is the way they measure time. The classical physician had no stopwatch, so he timed the retention of the ghee the way a musician keeps a beat — by counting syllables (or measured words) evenly under the breath. And the count was not arbitrary: it varied with the constitution of the patient and the dosha behind the disease, and, in a finer reckoning, with the exact seat of the affection in the eye. This is the matra, the “measure,” of Tarpana.

By the dosha at fault, the Sushruta Samhita gives a graded scale — the ghee held longest where the fault was hardest to reach:

And by the seat of the disease — whether it lodged in the eyelid-margins, the white, the black or the pupil — the tradition gives a still finer scale, with the retention rising as the affection sits deeper in the eye: shorter for the Sandhi (the corners and junctions), longer for the Vartma (the lids), longer again for the Shukla (the white) and the Krishna (the black), and longest of all for a disease seated in the Drishti (the pupil, the seat of sight itself). The principle is consistent and rational: the deeper and more obstinate the seat, the longer the eye is left to steep in the nourishing ghee.

Afterwards, the procedure closed as carefully as it opened. The ghee was let out through the inner corner of the eye; the eye was cleansed with a poultice of pasted barley; and any heaviness or Kapha left behind by the rich ghee-bath was cleared by having the patient inhale a suitable medicated Dhuma (smoke). The whole Tarpana might be repeated for one, three or five days in succession, depending on the case. Every stage — preparation, pouring, retention, drainage, after-care — had its rule.

Samyak, Ayoga and Atiyoga: Reading the Signs of Tarpana

A procedure this deliberate needed a way to tell whether it had worked — and here the classical text is at its most impressive, because it teaches the physician to read the eye afterwards for signs of a correct, an insufficient, or an excessive treatment. These three outcomes have names that recur throughout Ayurvedic therapeutics: Samyak (the right measure), Ayoga (deficient application) and Atiyoga (excess).

What is so striking here is the demand for close, honest observation. The physician is told exactly what a well-nourished eye feels and looks like — light, clear, rested — and exactly how an over-treated or under-treated eye betrays itself. And the tradition does not leave a mistake uncorrected: for both excess and deficiency it prescribes remedies — medicinal snuffs (Nasya), Anjana (collyrium), washes, inhalations of medicated smoke, and either drying or emulsive measures as the case required. A procedure, its success-signs, its failure-signs, and the correction for each failure: it is a complete little clinical loop, closed and self-correcting, and that is what marks it as real medicine rather than ritual.

Netra Puta Paka: The Bolus-Cooked Eye Treatment

The most concentrated of the five measures is Puta Paka, and its name describes its method: puta is a covering of leaves and clay, and paka is cooking — a preparation made by wrapping medicinal materials into a ball, encasing it in leaves and a coat of clay, and roasting it, so that its potent, expressed juice can then be applied to the eye much as Tarpana is, held within a wall of dough. Puta Paka was used, the text says, in the same cases as Tarpana — and, crucially, only after the deranged dosha had first subsided, never at the height of an inflammation.

The Sushruta Samhita divides Puta Paka into three kinds, according to the effect intended, and this triad is one of the most elegant classifications in the eye chapters:

The materia medica of Kriya Kalpa: ghee and honey, rock salt (saindhava), the three myrobalans of Triphala, and a shelf of herbs and minerals, ground in a brass mortar. From these the classical physician built his drops, streams, salves and bolus-cooked applications. Shown as classical scholarship, not as a formula to prepare

Notice the beautiful matching of means to end: Snehana uses the fattest, most unctuous materials to nourish; Lekhana uses dry flesh and mineral abrasives to scrape away excess; Ropana uses gentle, healing, bitter and sweet materials to restore. And the retention times track the intent — scraping is briefest, nourishing is longer, healing longest of all. After the Puta Paka, the same after-care as Tarpana followed: fumigation, oiling and fomentation, a course of one to three days, and a strict regimen of diet and conduct kept for twice as long as the preparatory period. Once more the through-line is a tradition that had thought carefully about what each kind of eye needed, and built a distinct preparation for each.

Anjana and the Salaka: The Classical Collyrium and Its Rod

The fifth measure, Anjana, is the one that has travelled furthest into everyday Indian life — for it is the ancestor of kajal and surma, the collyrium darkening the rim of the eye. In classical Kriya Kalpa, though, Anjana was a precise therapeutic tool: a medicated collyrium, prepared as a powder, a soft paste or a small stick, applied along the inner surface of the lids with a special rod. The tradition classes Anjana by its action — a soothing (snehana) kind, a scraping (lekhana) kind and a healing (ropana) kind — the same three-fold logic that governs Puta Paka, applied now to the salve.

The tail of the preceding chapter, on the diseases of the Drishti (the pupil), gives two lovely recipes for what it calls an “eye-sight-invigorating” Anjana — a collyrium the classical text credits with imparting clearness and steadiness to the vision. One is made by pounding the flowers of Mesha-shringi, Shirisha, Dhava and Malati together with pearl and Vaidurya (beryl), working them into a paste with goat's milk; the compound is then kept in a copper vessel for a week and rolled into Vartis — small collyrium sticks — of convenient length. A second is made from Srotonjana (a form of antimony), coral, Samudra-phena (cuttlefish-bone / sea-foam), Manah-shila and Maricha (pepper), similarly rolled into a stick; it “imparts steadiness of vision.” These are recorded here strictly as the history of medicine — a classical apothecary's recipes, several of them containing minerals no one should ever handle or apply, and emphatically not anything to prepare or use.

Anjana, the classical collyrium, was rolled into little sticks (Vartis) and applied along the lids with a slender bud-tipped rod, the Salaka. The Sushruta Samhita even specifies the rod: eight fingers long, tipped like a flower-bud, of copper, iron or gold. A precise instrument, shown here as classical scholarship

The tool for applying Anjana was the Salaka (or Shalaka), the collyrium-rod — and the Sushruta Samhita, ever the surgeon's text, is exact about it. The rod should measure eight fingers in length, be slender as the upper joint of the thumb, its middle wound with thread for grip, and its two ends rounded into the form of a bud — smooth, so as not to scratch. It could be fashioned of copper, iron or gold. The same text warns that a badly made or badly used rod is dangerous: a rod with a thick, blunt top can gouge, a too-sharp one can pierce, an uneven one makes the eye water, and an unsteady hand ruins the whole operation. A defective procedure, it cautions, can leave redness, swelling, a sucking pain, a growth (arbuda), a squint or an inflammation — each to be set right according to the dosha at fault. This same slender rod, at a graver scale, is the instrument behind the classical cataract-couching operation described elsewhere in the Uttara Tantra. In every line, one hears the same ethic: the eye is precious; the instrument must be perfect and the hand gentle.

Netra Roga and the Cases for Kriya Kalpa

Which eye was given which measure? The classical texts are careful to match the procedure to the state of the eye and the stage of the disease — and equally careful about when not to act. For Tarpana, the Sushruta Samhita lists the eyes that most call for the nourishing ghee-bath: an eye whose lashes are shrivelling or falling; a vision grown cloudy, dark or “arched”; an eye painfully dry, with no natural watering; a stiff, hardened lid; and a generally weakened, strained or long-diseased eye. In short, Tarpana was the measure for the dry, tired, depleted eye that needed feeding — not the acutely inflamed one.

Against this stand the firm contraindications, and they are as instructive as the indications. Tarpana was not to be done on a cloudy day, nor on a day excessively hot or cold; nor upon a person “engrossed by anxiety or fear”; nor while the acute, supervening symptoms (the Upadrava) of an eye-disease were still active — only after they had subsided. Read that list again and its wisdom shows: the tradition understood that a heavy nourishing procedure suits neither a raw, inflamed eye nor an agitated, fearful patient nor unsettled weather, and it says so plainly. This same discernment runs through all the classical eye writing, from the fourteen causes of eye disease to the great catalogue of the eye disorders by their seat. Each of these netra roga is discussed in the tradition, and here, only as a subject of classical scholarship.

The Discipline Around the Eye: The Post-Procedure Regimen

What lifts these chapters above a mere list of techniques is the tradition's attention to what happens around the procedure — the paripalana, the after-care and conduct. Having pooled ghee over an eye or applied a Puta Paka, the classical physician did not simply send the patient away. The freshly treated eye, the text warns, is tender and light-shy, and must be protected. The patient was told not to look, immediately afterward, at bright light, at fire, at the open sky, at a looking-glass or at any dazzling, luminous object; not to strain the eye, weep, or expose it to wind, smoke, dust or heat; and to keep to a quiet regimen of gentle food and rest for a set period — classically, twice as long as the preparatory phase had lasted.

There is real physiological sense in this, and a modern reader feels it at once. An eye that has just been steeped in warm ghee is relaxed, dilated and sensitive; sudden glare or strain would undo the good and could hurt it. The tradition's counsel — shade, rest, no bright screens of fire or sky, no strain — is exactly the kind of care a sensible person would give a tired or dilated eye today. It is one more place where the classical instinct, stripped of its specific procedures, still rings true: after you tax or treat the eyes, you must rest and shade them. We record it here as classical scholarship — but the underlying good sense of resting and protecting the eyes is something modern life, lit by screens, could take to heart.

Kriya Kalpa and the Screen-Tired Eye: An Honest Reading

It is impossible to read the Kriya Kalpa chapter in our own century without a flicker of recognition. Here is an ancient tradition preoccupied with dry, strained, tired eyes — eyes that ache, water, lose their clearness, feel gritty and heavy — and building around them a whole practice of soothing drops, gentle streams, nourishing baths and, above all, rest and shade. We are the generation that stares at glowing rectangles from waking to sleeping, and complains, more than any before us, of exactly those tired, dry, strained eyes. The resemblance is worth an honest, careful hearing — neither the breathless claim that “the ancients cured screen fatigue,” nor the dismissal that they knew nothing.

What is genuinely admirable, as the history of medicine, is the classical instinct that the eyes are a bodily organ that can be tired, depleted and dried by how we use them, and that deserve deliberate rest and care. That instinct is sound, and it long predates any modern account of eye strain. The tradition's larger counsel — don't strain the eyes, shade them from glare, rest them, keep the whole body and its rhythms in balance — is wisdom the screen age can genuinely use, and it needs no ancient theory to justify it.

And yet the honest part must be said just as plainly. The specific classical procedures — pooling ghee over the eye, instilling medicated or mineral drops, applying a collyrium with a rod — were clinical acts for a trained physician, built on a pre-modern understanding of the eye, and several of them used materials (mineral collyria, animal fats) that no one should place anywhere near a modern eye. They are not home remedies, not self-care hacks, and not a substitute for an eye doctor. If your eyes are dry, strained, sore or changing, the right response is not to reach for ghee or a classical recipe, but to rest them, reduce the strain, and see a qualified eye-care professional. The heritage is to be admired; the eye itself is to be protected.

The Timeless Instinct: Rest, Gentleness and a Well-Ordered Day

Held that way, the Kriya Kalpa chapter loses none of its wonder and gains its proper humility. Its deepest lesson is not a procedure but a posture toward the body: gentleness, rest and rhythm. Classical Ayurveda wove that posture into the whole shape of a day — the discipline of Dinacharya, the well-ordered daily routine, and the seasonal wisdom of Ritucharya — a life of measured work and true rest, of not straining the senses past their strength, and of small, kind rituals of self-care. That larger instinct, and only that, is where a wellness brand can honestly belong.

The honest place for a wellness brand in a chapter like this is only in the small comforts of a well-ordered, restful day: a gentle facial-care ritual as the screen-lit day winds down. Everyday cosmetic heritage — part of a calm daily rhythm, and nothing to do with the eyes or with any treatment

None of what follows is a treatment, a cure or a remedy for any eye condition, for eyesight, for vision or for anything at all — and none of it goes anywhere near the eyes. These are simply ordinary cosmetic comforts for the skin of the face, the kind of gentle, unhurried self-care that suits the end of a long, screen-lit day, offered in the spirit of a calm daily routine and nothing more.

The first is Kumkumadi Tailam — a classical facial oil whose very name comes from kumkuma (saffron), and which the old cosmetic tradition prized as a night-time facial treatment for a soft, even, luminous complexion. Ours is made in that classical spirit, a facial-skin oil massaged lightly into the skin of the face at night. It belongs to the tradition's love of gentle daily ritual — and you can read the fuller story of the formula in our guide to the classical idea of Rasayana and daily rejuvenation.

The second belongs to the gentlest end of daily facial care — the cool, fragrant splash of rose water the Indian household has loved for generations as a refreshing facial mist at the close of a warm, tiring day.

That is the whole of the honest place for any of this: a few small, pleasant comforts for the skin, within a temperate, well-rested day. The classical physician, for his part, would recognise the instinct behind it — his entire Kriya Kalpa is, in the end, an argument for gentleness, rest and care, applied to the most precious of the senses.

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