掲載元 Visual Acuity and the Evolution of Signals https://scienceblog.com/501269/details-that-look-sharp-to-people-may-be-blurry-to-their-pets/http://www.dailymail.co.uk/sciencetech/article-5788569/How-pet-REALLY-sees-world-Incredible-images-reveal-animal-vision.html