World Sight Day is this Thursday, Oct. 9 and the U.S. eyecare industry is joining forces once again to celebrate in support of Optometry Giving Sight (OGS) and its annual fundraising campaign, the World Sight Day Challenge. Now in its 7th year, the World Sight Day Challenge is the largest annual global fundraising campaign to address avoidable blindness caused by uncorrected refractive error—the need for an eye exam and glasses.