Specialist eclipse glasses are largely sold out online and in retail locations across the United Kingdom as enthusiasts scramble to obtain safe viewing equipment for an upcoming solar eclipse. The event, anticipated to be the most significant observed in the UK since 1999, has led to an unprecedented demand for protective eyewear.
Retailers, including bakeries and established institutions like the Royal Museums Greenwich, have reported their stock flying off the shelves. One London bakery sold approximately 100 pairs of eclipse glasses in a single morning, with customers seeking alternatives to postal delivery due to time constraints. The Royal Museums Greenwich cited an "unprecedented volume" of orders for their sold-out stock.
Experts from the UK Health Security Agency (UKHSA) and the Royal College of Ophthalmologists are urging the public to use only specialized glasses that meet the international safety standard ISO 12312-2. These glasses should have lenses that are free from scratches, tears, or damage. Regular sunglasses are not sufficient for safe viewing, as they do not block enough of the sun's harmful rays.
"Even brief exposure can cause lasting damage," warned experts, emphasizing that the retina lacks pain receptors, meaning damage can occur without immediate sensation. The Royal College of Ophthalmologists noted that approximately 70 individuals experienced vision problems after viewing the 1999 total solar eclipse, with a significant portion having looked at the sun for less than a minute without proper protection.
Imo Bell, a planetarium astronomer at The Royal Observatory Greenwich, described the specialist glasses as "very, very different" from ordinary sunglasses, noting they block so much light that only the sun is visible through them. The upcoming eclipse is expected to obscure around 90% of the sun, making it a rare and significant astronomical event for which preparation is crucial.
With online availability limited and delivery times often exceeding the event date, many are resorting to physical searches for the scarce protective gear. Health officials have also advised caution regarding glasses being sold on social media platforms, as the high demand may have led to the proliferation of unverified or unsafe products. For those unable to find specialized glasses, indirect viewing methods such as watching a livestream or broadcast are recommended as the safest alternative.