Taking a good look at your tree's Christmas lights could help you determine whether you need to see an optician. It could reveal a common problem that millions of people have. Optometrist Bridget Zoellner, who goes by the username @Bridgettheeyedoctor on TikTok, put different lenses in front of the camera, pointed at her Christmas tree, and asked viewers to watch. With each change, the festive lights got progressively more blurry and streaky. But this is an all too common condition that many