Three teenagers in the UK have created a condom that changes colour if it detects an sexually transmitted infection (STI). They have aptly named it S.T. EYE. Source: News Corp Australia

A group of UK teenagers has developed a condom that changes colour when it comes into contact with sexually transmitted infection (STI).

Aptly named the S.T. EYE, it has a built-in indicator to detect infections such as chlamydia and syphilis by turning a different colour when it detects a strain of bacteria.

Three students from Isaac Newtown Academy in Essex — Daanyaal Ali, 14, Muaz Nawaz, 13, and Chirag Shah, 14 — came up with the idea because they wanted to “make detecting harmful STIs safer than ever before” without needing an invasive test.

Their idea has been recognised at the recent TeenTech awards in London, taking out the best health innovation title, The Independent reported.

Daanyall said they created the S.T. EYE to help future generations.

“We wanted to make something that makes detecting harmful STIs safer than ever before, so that people can take immediate action in the privacy of their own homes without the invasive procedures at the doctors,” she said.

“We’ve made sure we’re able to give peace of mind to users and make sure people can be even more responsible than ever before.”

The group received about $2041 (£1000) and a trip to Buckingham Palace.

“We encourage students to take their ideas out of the classroom by putting them face-to-face with industry professionals, helping to open their eyes to the real potential of their ideas,” TeenTech’s founder and chief executive Maggie Philbin said.

Other inventions that were on show at the prestigious awards included shoes that use the energy of walking to charge devices while on the go and wi-fi hair accessories that match the colour of clothing.

Another invention called the eWaterTap is a device to be used in rural Africa to help communities manage their water systems, The Mirror reported.