There are two regions during the retina, called the deep and shallow fovea, which have been specialized for acute vision.[42] These areas include the best density of photoreceptors, and supply the highest points of visual acuity. The deep fovea points ahead at an approximate 45° angle, whilst the shallow fovea https://bookmarks-hit.com/story22872928/5-simple-statements-about-pet-shop-subai-explained