Aktar’s work is demanding, with each worker expected to produce thousands of garments a day. Precision is essential, and even small mistakes can slow production or result in rejected items. Aktar said her new glasses have helped her thread needles faster — and they’ve also relieved her headaches and eye strain.

“Before I got the glasses, it took me a long time to thread the needle. Now I can thread it in just a short time. I make far fewer alterations than before,” she said.

In Bangladesh, home to the world’s second-largest garment industry after China, some factory owners are working on supplying more glasses to workers to boost productivity. The country’s garment sector contributes about 11% of gross domestic product and employs around 4 million workers.

VisionSpring, a global nonprofit social enterprise supplying affordable glasses to people in poorer countries, estimates that roughly one in three Bangladeshi garment workers need glasses but do not have them.

The group has supplied glasses that cost less than ten dollars per pair to some workers through a partnership with the Bangladesh Garment Manufacturers and Exporters Association, which represents factory owners.

Ella Gudwin, chief executive of VisionSpring, said the benefits were immediate, as workers were better able to meet quality and production targets. Better vision also reduces mistakes such as skipped stitches, uneven hems and misplaced buttons, cutting the need for rework, she said.

Fahima Akhter, a director of Bangladeshi garment company Masco Group, said managers initially did not realize how many workers had vision problems because they rarely complained. She said Masco Group has screened about 5,000 workers, with around 30% receiving glasses.

Akhter said her company plans to extend the program to its remaining workforce of more than 20,000 employees.

“We don’t consider it a cost. It is an investment. If the workers are working with better vision, their productivity and workplace safety will improve, and eventually this will translate into better productivity and profit for the company,” she said.

A randomized controlled research trial in India that was co-authored by Gudwin suggested that sewing machine operators who received reading glasses increased productivity by 6% while making fewer errors. The study, published in April in the British Journal of Ophthalmology, found that every $1 spent on vision screening and glasses generated $3.37 in productivity gains over 12 weeks.

It estimated that expanding similar programs across the global textile and garment industry could generate the equivalent of $27 billion in additional annual output.

Gudwin said vision correction has long been overlooked because eyeglasses were often seen as a luxury rather than an essential workplace tool. She said many factory workers develop age-related short-sightedness in their late 30s and early 40s, but delay treatment because they assume glasses are expensive.

Gudwin said bringing eye screenings directly into factories removes those barriers.

Masco Group’s Akhter said Bangladesh’s garment sector should make vision screening a standard workplace benefit.

“Having a clear vision is not a luxury, it is a necessity now,” she said.