First 3D-printed human corneas can aid transplants
London, May 30: In a first, British scientists have 3D printed human corneas that could cut down shortage of eye donors available for transplant.
In the research, researchers from Britain's Newcastle University, mixed stem cells (human corneal stromal cells) from a healthy donor cornea with alginate and collagen to create a solution that could be printed or a "bio-ink".
Using a simple low-cost 3D bio-printer, the bio-ink was successfully extruded in concentric circles to form the shape of a human cornea. It took less than 10 minutes to print.
"Our unique gel -- a combination of alginate and collagen -- keeps the stem cells alive whilst producing a material which is stiff enough to hold its shape but soft enough to be squeezed out the nozzle of a 3D printer," said lead author Che Connon, a professor at the varisty.
The results published in the journal, Experimental Eye Research, also stated that the stem cells could culture -- or grow.
"...we have a ready to use bio-ink containing stem cells allowing users to start printing tissues without having to worry about growing the cells separately," Connon added.
According to the researchers, there is a significant shortage of corneas available to transplant, with 10 million people worldwide requiring surgery to prevent corneal blindness as a result of diseases such as trachoma, an infectious eye disorder.
Further, the study also demonstrated that the cornea could also be built to match a patient's unique specifications.
The dimensions of the printed tissue were originally taken from an actual cornea. By scanning a patient's eye, they could use the data to rapidly print a cornea which matched the size and shape, the team explained.
"...what we have shown is that it is feasible to print corneas using coordinates taken from a patient eye and that this approach has potential to combat the world-wide shortage," Connon said.
However, the researchers admitted that further investigations on 3D printed corneas are needed before they could be used in transplants.
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Cong takes swipe at PM over India not being part of US-led 'Pax Silica' grouping
New Delh (PTI) The Congress on Saturday said it is perhaps not very surprising that India is not part of a US-led strategic initiative to build a secure silicon supply chain, given the "sharp downturn" in the Trump-Modi ties, and asserted that it would have been to "our advantage if we had been part of this group".
Congress general secretary in charge of communications Jairam Ramesh took a swipe at Prime Minister Narendra Modi, saying the news of India not being part of the group comes after the PM had enthusiastically posted on social media about a telephone call with his "once-upon-a-time good friend and a recipient of many hugs in Ahmedabad, Houston, and Washington DC".
In a lengthy post on X, Ramesh said, "According to some news reports, the US has excluded India from a nine-nation initiative it has launched to reduce Chinese control on high-tech supply chains. The agreement is called Pax Silica, clearly as a counter to Pax Sinica. The nations included (for the moment at least) are the US, Japan, the Republic of Korea, Singapore, the Netherlands, the United Kingdom, Israel, the United Arab Emirates, and Australia."
"Given the sharp downturn in the Trump-Modi ties since May 10th, 2025, it is perhaps not very surprising that India has not been included. Undoubtedly, it would have been to our advantage if we had been part of this group."
"This news comes a day after the PM had enthusiastically posted on his telephone call with his once-upon-a-time good friend and a recipient of many hugs in Ahmedabad, Houston, and Washington DC," the Congress leader asserted.
The new US-led strategic initiative, rooted in deep cooperation with trusted allies, has been launched to build a secure and innovation-driven silicon supply chain.
According to the US State Department, the initiative called 'Pax Silica' aims to reduce coercive dependencies, protect the materials and capabilities foundational to artificial intelligence (AI), and ensure aligned nations can develop and deploy transformative technologies at scale.
The initiative includes Japan, South Korea, Singapore, the Netherlands, the United Kingdom, Israel, the United Arab Emirates, and Australia. With the exception of India, all other QUAD countries -- Japan, Australia and the US -- are part of the new initiative.
New Delhi will host the India-AI Impact Summit 2026 on February 19-20, focusing on the principles of 'People, Planet, and Progress'. The summit, announced by Prime Minister Narendra Modi at the France AI Action Summit, will be the first-ever global AI summit hosted in the Global South.
Prime Minister Modi and US President Trump on Thursday discussed ways to sustain momentum in the bilateral economic partnership in a phone conversation amid signs of the two sides inching closer to firming up a much-awaited trade deal.
The phone call between the two leaders came on a day Indian and American negotiators concluded two-day talks on the proposed bilateral trade agreement that is expected to provide relief to India from the Trump administration's whopping 50 per cent tariffs on Indian goods.
In a social media post, Modi had described the conversation as "warm and engaging".
"We reviewed the progress in our bilateral relations and discussed regional and international developments. India and the US will continue to work together for global peace, stability and prosperity," Modi had said without making any reference to trade ties.
