Timira in the Sushruta Samhita: Drishti-gata Roga, Night-Blindness (Naktandhya) and the Anjana Collyriums of the Uttara Tantra

📖 27 min read · By Ayurveda Hub

Timira: Sushruta's Word for the Failing Light

There is a particular dread in watching the world go dim. Long before anyone had a name for the lens of the eye or knew what clouded it, the physicians of ancient India had watched that slow loss of light in their patients and given it a name: Timira, literally darkness — the gradual dimming, blurring and loss of vision. And in the Sushruta Samhita, the classical home of Indian surgery, they did something remarkable with it. They did not throw up their hands. They sorted the failing of sight into types, traced each to a cause, and set out, salve by salve and drop by drop, what could be done and — just as honestly — what could not.

The home of this teaching is the Uttara Tantra, the last great section of the Sushruta Samhita, much of which is given over to the diseases of the eye, ear, nose and head — the field a later age would call shalakya tantra. Within it, the chapter we are reading is the Drishti-gata-Roga-Pratishedha: the pratishedha (treatment, warding-off) of the drishti-gata rogas, the diseases seated in the drishti — the pupil and the crystalline lens, the deep apparatus of sight itself. These are the gravest of the eye disorders, because they strike not the surface but the seeing power; and Timira is their great representative.

The account that follows is drawn from the Uttara Tantra of the Sushruta Samhita — the classical chapter on the treatment of the diseases of the pupil and crystalline lens (Drishti-gata-Roga-Pratishedha)

One detail in this chapter has made it quietly famous in the history of medicine, and we will come to it in full: for the loss of sight at night, Sushruta reaches again and again for liver. It reads, at first, like a curiosity. It turns out to be one of the most striking near-misses of ancient science, because night-blindness is exactly the failing that modern nutrition traces to a shortage of vitamin A — and liver is the richest store of vitamin A there is. Hold that thought; it is the kind of thing that makes reading these old texts worthwhile.

A word on how to read what follows. Everything below is a description of a classical text, set down by observers of extraordinary care, and offered here for history and understanding. None of it is a self-help protocol, and none of our products has any part in it. If you would like the wider frame — how the whole eye section is built — our survey of the seventy-six eye diseases of the Sushruta Samhita is the natural place to begin, and the companion chapter on the treatment of Abhishyanda, the inflamed eye, sits right beside this one.

Drishti-gata Roga: The Diseases of the Pupil and Lens

The chapter opens by naming its territory with a surgeon's precision. It concerns the diseases of the drishti — the pupil and the crystalline lens — and it begins, characteristically, with a piece of honest triage. Of the disorders gathered in this group, Sushruta states, three are curable, three are incurable, and the remaining six admit only of palliative treatment (Uttara Tantra, Chapter XVII, verse 1). It is a sobering opening, and a deeply medical one. Before he offers a single remedy, the classical surgeon tells you the limits of what remedy can do.

The deep eye disorders shade into one another, and Sushruta cross-refers as he goes. Dhuma-darshi — "smoky" or "dusky" vision, the sense of looking through haze — he notes he has already described, in connection with the Pitta-born ophthalmia of an earlier chapter (he points back to Uttara Tantra X.9). What this chapter adds is the treatment: the array of measures by which the classical physician met the dimming of sight before, in the worst cases, it passed beyond his reach.

Those measures are worth listing at the outset, because the whole chapter is built from them. For the deep eye diseases born of deranged Pitta and Kapha, Sushruta prescribes — setting surgery aside — the application of Nasya (medicated nasal drops or snuff), Seka (a gentle sprinkling or irrigation of the eye), Anjana (collyrium, the medicated eye-salve), Alepa (a plaster laid over the closed eye), Putapaka and Tarpana (the soothing ghee-bath therapies for the eye). This family of eye-procedures, the netra kriya kalpa, is the practical heart of classical ophthalmology, and we read it in detail — the drop-counts, the ghee-baths, the salves — in our companion guide to Sushruta's treatment of the eye.

The Vocabulary of the Eye Clinic: Anjana, Ghrita and Nasya

This chapter, more than most, turns on a handful of technical words, and a few minutes spent on them repays the whole reading. The classical eye clinic had its own materia and its own methods, and Sushruta names them exactly.

The central one is Anjana — collyrium, the medicated eye-salve, applied to the inner rim of the lids with a slender rod (a shalaka). An Anjana might be a powder, a paste, a pill dissolved at the moment of use, or a stick; the chapter is, in large part, a catalogue of these forms. Alongside it stand the great vehicles of classical eye-medicine: Ghrita (clarified butter, ghee), prized above all other fats for carrying medicine gently to the delicate tissues; Nasya or Navana (medicine given through the nose, on the old understanding that the nose is the doorway to the head and so to the eyes); Seka (sprinkling the eye); and Tarpana and Putapaka (the nourishing ghee-bath therapies). Underlying the whole scheme are the three doshas — Vata, Pitta and Kapha — whose disturbance the text uses to explain why one eye fails by day and another by night, and why no two cases are treated alike.

With those in hand, the architecture of the chapter is clear. Sushruta moves from the two "scorched" or "clouded" visions — the Pitta one that fails by day and the Kapha one that fails by night — through his whole family of Anjana salves and medicated ghees, to the graded treatment of Timira itself, and finally to the blunt measures reserved for the cases that only palliation could touch.

Pitta-vidagdha and Sleshma-vidagdha: Day-Blindness and Night-Blindness

Two conditions anchor the chapter, and they make a beautifully symmetrical pair. In one, a person sees poorly by day and better as the light softens; in the other, the reverse — vision holds in daylight but fails as dusk comes on. Sushruta reads them, as he reads everything, through the doshas.

The first is Pitta-vidagdha drishti — literally the vision "scorched" by Pitta, the hot, sharp, fiery dosha. Its sufferer is dazzled and dimmed by the bright light of day and sees more easily in shade or by a gentler light: this is day-blindness. Against the heat at its root, Sushruta's logic is cooling. He prescribes Traiphala-Ghrita — ghee cooked with Triphala — for the Pitta-vidagdha eye (Uttara Tantra XVII.1), together with collyriums and washes of a cooling character, the fire met with the soothing qualities of clarified butter and the three fruits.

Its mirror image is Sleshma-vidagdha drishti — the vision "clouded" by Sleshma (Kapha), the cold, heavy, watery dosha. Here the eye does well enough by day but loses its grip on a dim world: this is night-blindness. For it Sushruta turns to Traivrita-Ghrita — ghee prepared with Trivrit — in place of the Triphala ghee, and to warmer, more penetrating, more drying measures suited to a watery, cloudy fault (XVII.1). Old and well-matured clarified butter, and a preparation he calls Tailvaka-Ghrita, he found useful in both kinds alike.

The two "scorched" and "clouded" visions make a symmetrical pair — the Pitta eye dazzled and dimmed by day, the Kapha eye failing as the light falls — and Sushruta meets each with its own medicated ghee

Notice the elegance of the reasoning. A fault of heat that flares in the brightness of day is cooled; a fault of cold and cloud that thickens with the dark is warmed and cleared. Whatever modern ophthalmology makes of the underlying conditions — and day- and night-blindness have their own well-understood modern causes — the classical method is consistent within itself, reading the symptom for the dosha and matching the remedy to it. The three-dosha framework that makes this possible is one we lay out from the ground up in our guide to the Tridosha theory of Vata, Pitta and Kapha.

The Anjana Collyriums: Pushpa, Drava, Gudika, Churna and Kshudra

If the chapter has a signature, it is the Anjana — the collyrium — and Sushruta gives it in a whole graded family of forms, each named, each with its own recipe and use. To read this part is to look over a classical eye-physician's shelf.

He begins with the Pushpanjana, the "flower collyrium" (Uttara Tantra XVII.2–4). It is compounded from the powdered flowers of a list of plants — Kubjaka, Ashoka, Shala, Amra (mango), Priyangu, Nalini and Utpala (the red and blue lotuses) — together with Renuka, Pippali, Haritaki and Amlaki, mixed with honey and clarified butter. The blend, he directs, should be kept inside a hollow bamboo (a classical way of storing a delicate eye-salve) and applied as a collyrium in the Pitta-clouded and Kapha-clouded eye alike. Then come the Dravanjana (a "liquid" collyrium) and the Gudikanjana, made by pasting pollens of the red and blue lotus with Gairika (red ochre) and the watery part of cow-dung and rolling the mass into pills (gudika) to be dissolved at the moment of use — recommended in day-blindness and night-blindness (XVII.5).

The collyrium came in a graded family of forms — a powder (Churna), a pill (Gudika), a paste, a stick (Varti) — each stored and applied in its own way, often kept in a length of hollow bamboo

The list goes on with a connoisseur's exactness. The Churna-anjana is a powdered collyrium — one recipe has Rasanjana soaked and dried through several steps and reduced to a powder, recommended for the Pitta-clouded eye; another pounds together Kashmari flowers, Yashtimadhu (liquorice), Darvi, Rodhra and Rasanjana with honey (Uttara Tantra XVII.6–8). The Kshudranjana — a "lesser" collyrium — is prepared in the expressed juice of Dhatri (amla), or in a serum, or in a decoction of Triphala, and applied to the affected eye (XVII.12–14). And the Rasa-Kriyanjana is a still more elaborate boiled-down extract. It is a genuinely systematic pharmacy of the eye, organised by the form of the medicine as much as by the disease.

It is worth pausing on a recurring ingredient, because it ties this chapter to one of the most celebrated of all Ayurvedic remedies. Again and again — in the flower collyrium, in the lesser collyrium, in the medicated ghees — the three fruits of Triphala (Haritaki, Vibhitaki and Amalaki) appear. Triphala's long association with the eyes is one of the throughlines of classical ophthalmology, and we tell its full story, drawn from the Charaka Samhita, in our guide to Triphala as a classical Rasayana.

Naktandhya: Night-Blindness and the Liver That Anticipated Vitamin A

Here is the passage that has earned this chapter its quiet fame. For Naktandhya — nocturnal blindness, the loss of sight as the light fails — Sushruta sets out a run of remedies, and a single ingredient keeps surfacing in them: liver.

The recipes are specific. He describes a medicated Varti (a collyrium stick) for nocturnal blindness, and several collyriums besides (Uttara Tantra XVII.9–14). Then the liver appears in earnest. The fat and liver of a goat, he writes, cooked with clarified butter, the milk of a she-goat, Pippali (long pepper) and Saindhava (rock salt) and the expressed juice of Amalaka, make a collyrium for the night-failing eye (XVII.12–14). He goes further: the liver of a goat, stuffed with Pippali and roasted, used as a collyrium — or the liver taken as food — was held highly beneficial in nocturnal blindness; and the liver and spleen of a goat, cut up, cooked with oil and ghee and roasted, taken internally or applied to the eye, was said to relieve an attack of night-blindness (XVII.15–17). The same organ recurs through the whole passage, prepared a dozen ways, always for the same failing of sight in the dark.

For night-blindness, the chapter reaches again and again for liver, roasted with long pepper (Pippali) — a remedy that lines up with uncanny precision against what modern nutrition knows about vitamin A

Now set that beside what modern nutrition discovered, more than nineteen centuries later. Night-blindness — the inability of the eye to adjust to dim light — is the classic first sign of a shortage of vitamin A, the nutrient the retina needs to make the visual pigment that lets us see in low light. And of all the foods on earth, liver is the richest source of vitamin A there is — extraordinarily, concentratedly so. A physician who, knowing nothing of retinol or rhodopsin, nonetheless reached repeatedly and specifically for liver to treat the loss of sight at night had, by whatever path of patient observation, landed on precisely the right remedy for precisely the right deficiency.

It is hard to read this and not feel a small jolt of respect. The correspondence is not vague or forced; it is exact, repeated, and pointed at the one condition that vitamin A most clearly answers. Sushruta could not have known why liver helped — the vitamin would not be isolated until the twentieth century — but the empirical hit is uncanny. We collect more of these meetings between classical description and later science in our piece on what modern science has rediscovered in Sushruta.

Traiphala-Ghrita: Triphala, Ghee and the Eyes

If one preparation stands at the centre of this chapter, it is medicated ghee, and above all the Traiphala-Ghrita — clarified butter cooked with the three fruits of Triphala. It is prescribed for the Pitta-clouded eye, taken as a measure for the deep disorders, and used, as we will see, in the graded treatment of Timira itself. Ghee, in the classical understanding, is the gentlest and most penetrating of carriers, able to bring the virtue of a herb to the most delicate tissues of the body without harshness; and the eye, the most delicate organ of all, is exactly where that gentleness was prized.

Medicated ghee, and above all the Traiphala-Ghrita — ghee cooked with the three fruits of Triphala — stands at the centre of the chapter's treatment of the failing eye

This is the natural place to be honest about where a modern wellness brand does, and does not, belong in a chapter like this. Ghrita — clarified butter — is woven through the whole of Ayurveda, from cooking to the most refined of medicines, and it is a living heritage anyone can keep on their shelf. That heritage, and nothing more clinical than that, is the honest connection.

The other thread worth following from this section is Triphala itself — the three fruits that flavour the chapter's signature ghee. Their association with the eyes and with gentle, long-term nourishment runs all through the classics; the most beloved descendant of that nourishing tradition is the daily tonic known as rasayana.

Timira Chikitsa: The Graded Treatment of Vision-Loss

With its salves and ghees described, the chapter turns to Timira itself — the loss or darkening of vision — and lays out a graded course of treatment that is a small model of classical method (Uttara Tantra XVII.19–23). The first move is internal and preparatory: the patient is to be kept gently cleansed, purged with matured clarified butter and suitable purgatives, so that the body is readied before the eye is treated directly. The choice of purgative is matched to the dosha at fault — the Triphala ghee for the Pitta-and-blood types, Trivrit for the Kapha type, oil with Trivrit where all three doshas are concerned.

Then comes the treatment of the eye proper, and here the chapter is at its most precise. For Timira of any type, old and well-matured clarified butter, kept in an iron vessel, is held beneficial; and ghee cooked with Triphala (or with Mesha-shringi) is recommended in Timira of every kind. Most elegant of all is a single graded instruction: the patient is to lick a compound of powdered Triphala with ghee in the Pitta type of the disease, with oil in the Vata type, and with honey in the Kapha type (XVII.19–21). One base remedy — Triphala — carried in three different vehicles, each chosen to answer the dosha at fault. It is the dosha logic of the whole tradition, expressed in a single sentence.

Finally the chapter reaches for the nose. A medicated oil, taken as a Navana (an errhine, drawn up through the nostrils), is recommended in all kinds of Timira, on the classical understanding that the nose opens onto the head and so reaches the eyes from within (XVII.22–23). Different oils are specified for the different doshic types — cooling, sweet-grouped preparations for the Pitta and the Vata-and-blood varieties — and the chapter even points across to its own treatment of the great Vata disorders for the oils to use in the Vata type. It closes the regimen with Putapaka, the classical roasted-and-expressed eye-bath, prepared with the appropriate ingredients and applied to the eye (XVII.24).

The Palliative Six: Rakta-mokshana and the Limits of Treatment

It is the honesty of this chapter that marks it as a serious work of medicine. Sushruta opened by warning that six of the deep eye disorders admit only of palliative treatment — that they could be eased, but not cured — and he keeps faith with that warning at the end. For those six ocular affections, he writes, in which palliation is all that is open to us, the measure to resort to is rakta-mokshana: a careful blood-letting by opening the local veins, the patient being kept all the while gently purged with draughts of matured ghee duly cooked with purgative drugs (Uttara Tantra XVII, on the palliative types). In the Vata type of these affections, purging is induced more gently still, with castor oil taken in the vehicle of milk.

That is a remarkable thing to find in an ancient text: not the promise of a cure for everything, but a clear-eyed division of cases into those that can be cured, those that can only be relieved, and those beyond the reach of the medicine of the day. The classical surgeon offered what comfort he honestly could to the patient he could not restore, and said so plainly. The blood-letting itself belongs to a wider classical therapeutics; we touch on the surgical world it came from in our reading of the eye surgery of the Uttara Tantra.

What Sushruta's Eye Chapter Still Teaches — With a Clear Caution

Step back from the salves and the ghees, and a few things stand out about this two-thousand-year-old chapter. The first is the discipline of the observation: an eye that fails by day and one that fails by night, sorted, named, and met each with its own logic. The second is the systematic pharmacy — the Anjana given not as a single nostrum but as a graded family of forms, powder and pill and paste and stick, each with its use. And the third, the one that catches in the memory, is the liver for night-blindness: an empirical bullseye on a vitamin that would not be named for nineteen hundred years. Taken together, they are the marks of a tradition that watched the body with great care and wrote down honestly what it saw — including, to its lasting credit, the limits of what it could do.

What the chapter is not is a manual for the home. Its remedies were the work of trained hands in a world without anaesthetic eye-drops or sterile technique, and its preventive wisdom was the broad classical one — a wholesome, well-digested diet, gentle internal cleansing at the right times, an unhurried daily rhythm. That preventive temperament is the part of Ayurveda anyone can appreciate as a matter of general wellbeing. But it is general wellbeing we are talking about, and nothing more. None of it treats an eye disease, and none of it is a substitute for a modern eye examination.

Where, then, do our own products sit in a piece like this? To one side of it, deliberately — as everyday wellness, in the broad classical spirit of looking after a body gently, never as anything to do with the eye or its diseases. In that honest, general sense, a few of our preparations belong to the same culture of daily care this chapter grows out of: the heritage of ghrita, the amla that anchors the daily rasayana, and the gentlest of cosmetic comforts for tired eyes.

The lasting spirit of the chapter is a gentle, attentive care — the heritage of ghrita, the nourishing amla, a cooling rose water for tired eyes — offered as everyday wellbeing, never as a remedy for disease

That is the spirit in which to take all of this. The eye chapter of the Sushruta Samhita is a window onto a tradition that looked at the most delicate organ in the body with patience, ingenuity and honesty. Read it for that — for the history, the vivid recipes, the flash of liver-for-night-blindness that rings true across two thousand years. For your eyes, trust a qualified doctor. The two are not in competition; they simply do different work.

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Frequently Asked Questions

Disclaimer: This article is for educational and historical purposes only and describes a classical Ayurvedic text (the Sushruta Samhita, Uttara Tantra, Chapter XVII, on the diseases of the pupil and crystalline lens). It is not medical advice, diagnosis or treatment. Eye diseases and any change in vision are serious and require professional care; the classical collyriums, nasal medicines, blood-letting and other procedures named should never be self-administered, and nothing should ever be put into the eye on the strength of a traditional text. Ayurveda Hub products are wellness preparations, not medicines for Timira or any eye condition or disease. If you have any problem with your eyes or your sight — pain, redness, or difficulty seeing by day or night — please consult a qualified eye doctor promptly rather than acting on any traditional information.