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Clear Vision, Bigger Yields: Why Eyeglasses Could Transform Kenya’s Tea Industry
By Oliver Mwanko
Before a cup of tea reaches the breakfast table, thousands of workers have already shaped its journey. In Kenya’s tea-growing regions, farmers carefully pick the delicate “two leaves and a bud” that determine tea quality.
At the same time, factory workers sort, grade, package, and inspect tea every day. Their work requires precision, concentration, and clear eyesight.
As the world marks International Tea Day on May 21, attention is shifting toward the workers who sustain one of Kenya’s most valuable export industries.
Kenya remains one of the world’s leading tea producers and the largest exporter of black tea. In 2024, the country earned about Ksh181.69 billion from tea exports to 96 destinations worldwide.
However, behind these achievements lies a challenge that often goes unnoticed: poor eyesight among workers.
How Poor Vision Affects Tea Production
Tea production depends heavily on visual accuracy. Farmers must identify quality leaves quickly and accurately. Meanwhile, factory workers need to read labels, monitor weighing scales, and inspect tea grades with precision.
However, many workers above the age of 35 gradually develop declining near vision. As a result, productivity and accuracy begin to decline.
Tea pickers may struggle to identify premium leaves. Likewise, machine operators may find it difficult to calibrate equipment correctly. Drivers may also struggle to identify road hazards, especially in poor weather conditions.
Over time, untreated vision problems contribute to fatigue, headaches, slower performance, and workplace accidents.
Research now shows that poor vision is not only a health issue but also an economic challenge.
A recent agricultural study found that providing near-vision glasses improved productivity among tea pickers by 22 per cent. In addition, productivity gains rose to 32 per cent among workers above 50 years.
Workers who received eyeglasses also reported an average income increase of 18 per cent.
Furthermore, the study revealed that workers with untreated vision problems lost an average of 5.25 kilograms of tea per picker daily.
In an industry where every kilogram affects earnings and export value, such losses carry major economic consequences.
Eye Care Initiatives Begin Transforming the Sector
As evidence grows, several tea sector players are beginning to treat eyeglasses as essential productivity tools rather than luxury items.
Some Kenya Tea Development Agency-linked factories, cooperatives, and private partners are now investing in eye care programmes for workers and farmers.
Clear Vision, Bigger Yields: Why Eyeglasses Could Transform Kenya’s Tea Industry
One example is Gitugi Tea Factory in Murang’a County.
In June 2025, Dot Glasses organized a three-day eye camp at the factory.
During the programme, 1,051 people underwent eye screening while 807 pairs of glasses were distributed.
The results were immediate.
Programme reports showed that 65 per cent of participating workers and farmers recorded income increases averaging 41 per cent. Some participants even reported gains of up to 230 per cent.
At the same time, the factory achieved a 14 per cent increase in production. This happened despite a broader regional production decline caused by cold weather and low rainfall.
Workers also reported fewer headaches, dizziness episodes, and workplace accidents after receiving eyeglasses.
According to Elizabeth Waithanji, the initiative drew inspiration from similar projects in India, where tea farmers improved productivity after receiving prescription glasses.
She noted that although there was initial uncertainty about the programme, the partnership with Dot Glasses produced strong results.
The benefits extend across the entire tea value chain. Farmers can identify leaves faster, factory staff can inspect tea more accurately, and drivers can operate more safely.
In addition, Dot Glasses has expanded eye care access in remote farming communities through its “optical shop in a bag” model. The approach allows workers to receive affordable glasses on-site without travelling long distances for treatment.
According to Bradley, Co-CEO of Dot Glasses, many people underestimate the impact of eyewear on productivity and livelihoods.
“A pair of glasses may look simple, but for farmers, factory workers and factories themselves, it unlocks productivity, increases resilience, improves safety and grows profit,” he said.
Although eyeglasses cannot solve every challenge facing Kenya’s tea industry, they can remove one preventable barrier that has quietly reduced productivity for years.
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