The Ember Years: A History of China’s Ophthalmic Manufacturing (1950-1978)
Series A, Article 1 — The Seventy-Year Evolution of China’s Ophthalmic Device Industry
Why Trust This History? (E-E-A-T)
This series is curated by the Hongdee Editorial Team, drawing from internal industrial archives in Suzhou, early NMPA (National Medical Products Administration) registration records, and first-hand interviews with second-generation engineers from the Suzhou Medical Instrument Factory. Our goal is to provide B2B buyers with an authoritative context on the engineering DNA behind modern Chinese ophthalmic supply chains.
In 1955, a senior ophthalmologist at Peking Union Medical College Hospital performed a cataract extraction using a surgical knife that had been sharpened so many times the blade was half its original width. Replacement? Forget it. A single imported ophthalmic knife from Germany cost the equivalent of one tael of gold — roughly $600 in today’s money, back when the average Chinese worker earned less than $4 a month. There was a saying in operating rooms across China: “One knife, one tael of gold.”
This was not an exaggeration. It was the ledger-entry reality of Chinese ophthalmology in the 1950s: a profession with patients by the millions and instruments counted like precious metals.
What happened over the next 25 years — from complete dependence to the first domestically produced slit lamp — is not just a story of industrial catch-up. It is the origin story of every Chinese ophthalmic device you see on the market today. And it explains something that confuses many international buyers: why Chinese equipment is often over-engineered in ways that don’t make sense — until you know where it came from.
The Gold-Per-Knife Era: Searching for a Zeiss Slit Lamp Alternative
To understand Chinese ophthalmic manufacturing, you have to understand the world it was born into.
In 1949, China had roughly 12,000 trained physicians serving a population of 540 million. The number of ophthalmologists could be counted in the low hundreds. Equipment? Almost entirely pre-war stock: a handful of Zeiss slit lamps from the 1930s, some Japanese ophthalmoscopes left behind after the war, instruments brought back by doctors who had studied abroad. There was no domestic ophthalmic device industry. There wasn’t even a factory that could reliably produce the curved stainless steel blades required for cataract surgery.
Then came the trachoma crisis.
By 1956, an estimated 50% of China’s population — close to 300 million people — were infected with trachoma. In rural areas, blindness from trachoma-related scarring was so common that entire villages had no sighted adults of working age. The government launched a nationwide anti-trachoma campaign, training “barefoot doctors” to perform simple eyelid surgeries in village clinics. But training the doctors was only half the problem. The other half was the instruments: forceps, needle holders, chalazion curettes, and — most critically — surgical knives.
The State Council made a decision. China needed a factory dedicated to ophthalmic instruments, and it needed one immediately.
The Factory on Dairu Lane: The Birth of the Chinese Ophthalmic Supply Chain
In 1956, on a narrow street called Dairu Lane in the ancient city of Suzhou, the Suzhou Medical Instrument Factory opened its doors. It was designated by the Ministry of Health as China’s sole specialized manufacturer of ophthalmic surgical instruments — a monogamous marriage between an entire country’s eye care needs and a single factory.
The early days were brutal. The factory’s equipment consisted largely of modified watchmaking lathes and manual grinding wheels. Optical glass was sourced from a nearby lens workshop that had previously only made spectacle lenses. Steel came from whatever the state planning bureau could allocate — often low-grade carbon steel that required extensive hand-finishing.
Yet by 1962, just six years in, the factory had achieved something remarkable: it developed over 100 types of ophthalmic surgical instruments, including the “Crane” brand linear knife — a direct replacement for the gold-priced German imports. The Crane knife cost a fraction of the import, performed comparably in clinical use, and for the first time, made cataract surgery accessible beyond the wealthiest hospitals in Beijing and Shanghai.
This was not innovation in the Western sense. It was reverse engineering under duress — studying imported instruments, deconstructing their geometry, and figuring out how to replicate them with the materials and machines at hand. The factory’s engineers didn’t have metallurgical textbooks. They had samples, calipers, and trial-and-error.
The Soviet Shadow: Establishing Medical Device Certification Standards
The Chinese medical device industry of the 1950s was shaped by Soviet technical assistance under the “156 Projects” — a massive technology transfer program that brought Soviet engineers and equipment to Chinese factories. Two of those 156 projects were pharmaceutical and medical device plants. Soviet experts introduced standardized production processes, quality inspection protocols, and the concept of industrial documentation — things Chinese workshops had never systematically done.
But in 1960, the Soviet advisors left. Abruptly. Khrushchev withdrew all technical personnel amid the Sino-Soviet split, taking blueprints, equipment manuals, and unfinished machinery with them. Of the 4,412 pieces of equipment originally planned for the projects, only 2,214 had arrived. The rest never came.
For the Suzhou factory, this meant one thing: they were now completely on their own. No foreign technical support, no imported components, no access to international markets. Every screw, every spring, every lens had to be sourced or made domestically.
What Self-Reliance Actually Looked Like: Engineering Ophthalmic Durability
If you’ve ever wondered why the armrests on some Chinese examination chairs are thick enough to survive a car crash, or why the metal base plates on older Chinese slit lamps weigh twice what their Japanese equivalents did — this is why.
Self-reliance in 1960s China wasn’t a slogan. It was a material constraint that shaped design philosophy for decades.
The factory couldn’t source high-grade aluminum alloys — so they used steel. Couldn’t get precision ball bearings — so they used brass bushings that an operator could lubricate by hand. Couldn’t order replacement bulbs for ophthalmic instruments — so they designed lamp housings to accept standard domestic bulbs that a rural clinic could buy at a hardware store. Every design decision was a compromise between what was ideal and what was available.
This produced equipment that was crude in finish but remarkably durable in function. A 1972 Suzhou slit lamp — heavy, manually operated, with a light source that hummed audibly — could still be found in service at a county hospital in Henan province as late as 2010. The staff knew how to repair it because the manual told them how, and because they had no choice.
The 1970s: The First Chinese Slit Lamp vs. Global Standards
By the early 1970s, the factory had moved from surgical instruments to optical devices. The first domestically produced slit lamp microscope rolled out in this decade — a milestone that ended China’s dependence on imported Zeiss and Topcon units for basic anterior segment examination.
The early models were, by any honest standard, optically inferior to their German and Japanese counterparts. The slit beam was not as crisp. The magnification steps were coarser. The mechanical stage had more play than a clinician would tolerate today. But for the thousands of county hospitals that had previously been doing slit lamp examinations with a penlight and a magnifying glass, it was a revolution.
More importantly, the act of designing and manufacturing a slit lamp — a device that requires precision optics, mechanical engineering, and electrical systems to work in coordination — forced the factory to build capabilities that didn’t exist in China before. They had to learn how to grind and polish optical surfaces to clinical tolerances. They had to build jigs and fixtures for consistent assembly. They had to train a workforce that understood the difference between “looks right” and “meets specification.”
This was the real product of the 1970s. Not just the slit lamp itself, but the industrial capability to make one.
The Man Who Bridged Two Eras
In 1987, a Guangdong-born engineer named Zhou Yongyao became the factory director through Suzhou’s first-ever competitive bidding process for a state enterprise leadership position. His campaign document contained a single strategic directive: “Serve ophthalmology.” Not “increase output.” Not “meet plan targets.” Serve ophthalmology.
Zhou understood something that his predecessors in the planned economy era could not afford to prioritize: the factory’s purpose was not to fulfill production quotas — it was to solve clinical problems. Under his leadership in the 1980s and 1990s, the factory (later renamed 66 Vision, or “Liu Liu” — a reference to June 6, China’s National Eye Care Day) expanded from surgical instruments into surgical microscopes, microsurgical instrument sets, and eventually intraocular lenses and excimer lasers.
By the late 1990s, the factory that had started with watchmaking lathes was producing 85% of all ophthalmic devices used in Chinese hospitals. International ophthalmologists who visited began calling it “China’s Zeiss” — a label that Zhou would later say was both a compliment and a reminder of how far they still had to go.
The DNA That Survived: Why Modern Chinese Medical Devices are Different
If you look at a modern Chinese ophthalmic device — a Hongdee slit lamp table with 2.5mm steel walls, a Link autorefractor with a manual override for every automated function, a 66 Vision surgical microscope with spare bulb compartments built into the housing — you are looking at the living DNA of the ember years.
The over-built metalwork. The serviceability designed into every component. The insistence that the device must work even when the supply chain doesn’t. These are not accidental design choices. They are the engineering instincts of a generation that had to make things work with nothing, and planned for the day the spare parts stopped coming — because they remembered when they did.
The irony is that this “scarcity-era DNA” today translates into exactly what an overseas buyer in a developing market needs: equipment that doesn’t require a factory-trained technician to repair, that survives irregular power supply and rough transport, and that keeps running when the distributor is three countries away.
The Chinese ophthalmic device industry was not born in a research lab. It was born in an operating room where every knife was worth its weight in gold, and in a factory on a narrow Suzhou lane where engineers learned optics from scratch because someone had to.
Next in this series: A-2 — Opening Eyes (1978–2000). How Zeiss and Topcon entered China, what Chinese factories learned from them, and the birth of private ophthalmology in the world’s most populous nation.
