Scientists have developed a new wearable UV detection system that could help prevent sunburn and reduce the risk of skin cancer. The device, which is fully transparent, connects to a smartphone and tracks the user's exposure to ultraviolet (UVA) radiation in real time.
According to Cancer Research UK, nearly nine in ten skin cancer cases in the UK are caused by excessive exposure to UV radiation from the sun and sunbeds. UVA radiation, which has a longer wavelength, can penetrate deep into the skin and is considered the most dangerous type.
The new sensor, created by researchers at Soongsil University in Seoul, South Korea, is designed to be integrated into wearable devices such as smartwatches, glasses, or patches. Unlike existing opaque sensors, this clear device allows for seamless integration with the user's surroundings.
In tests, the sensor achieved an average transmittance of 75 per cent, meaning it allows most light to pass through. When connected to a smartphone, the system collects data on sunlight exposure and warns the user when they have reached 80 per cent of their threshold before sunburn is predicted to occur.
Prolonged exposure to UVA accelerates skin ageing and increases cancer risk. The study, published in the journal Science Advances, concludes that real-time monitoring is essential to prevent skin damage. However, experts emphasise that the device is an additional tool and should not replace other precautions such as wearing sunscreen and seeking shade during midday.
Cancer Research UK warns that getting sunburnt just once every two years can triple the risk of developing skin cancer, and a single blistering sunburn in childhood nearly doubles the lifetime risk of melanoma. The NHS recommends using sunscreen with at least SPF 30 and 4-star UVA protection.
