LONDON—Vision Direct and Fight for Sight have joined forces to start #ThinkUV, a campaign urging people to protect their eyes and think about the dangers of ultra-violet (UV) rays this summer. As part of the campaign, the organizations will be encouraging everyone to take a sunglass selfie and help raise funds for pioneering research into sight loss prevention.

The campaign is designed to highlight the importance of looking after your eyes in the sunshine and to protect them from harmful UV rays. Many people are proactive in protecting their skin with sun block, but often forget that too much sun can be just as damaging to the eyes, according to the two organizations. Over exposure can lead to conditions such as cataracts or macular degeneration. As part of the collaboration, Fight for Sight is accepting donations via text; text THUV16 £3 to 70070.

Vision Direct is asking everyone to post a selfie-style photo of themselves wearing their sunglasses to their personal social media pages using #ThinkUV. Participants have the chance to win a £300 (about $400) Amazon voucher and a free pair of sunglasses from Vision Direct.

The company has also pledged to donate £3 to Fight for Sight for every customer who takes part in the #ThinkUV challenge from Aug. 1 to Sept. 16 and another £3 for every pair of sunglasses sold.