To create this soft book, I was inspired by instructions from the LEA Vision Tests for infants and Vernier's phenomenon. I chose the illustrations that interested babies the most during experimental play sessions. The book is made of safe materials of the highest quality and comes with an OEKO-TEX® | STANDARD 100 certificate. The illustrations are printed using sublimation printing technology (the ink is permanently encapsulated within transparent fibers). Specifications: • Dimensions: 7 inches x 7 inches (18 cm x 18 cm), 8 pages. • Includes four rubber teethers for soothing gum massages. • Machine washable for easy cleaning. • Hygienically packed in PP foil. The cover fabric feels as soft as silk and is exceptionally durable. It doesn't crease, stain easily, or take long to dry. The book is filled with special foam to ensure hygiene and resilience. Its pages remain flat, perfectly displaying the illustrations without curling. These contrasting illustrations genuinely captivate the attention of little babies! Engaging with this book offers numerous benefits: • Enhances eye accommodation. • Develops perceptiveness within a wide field of view. • Aids in preventing visual deficiencies by engaging eye muscles for coordinated movements. • Captures an infant's attention, giving you a few moments for yourself. These remarkable contrasting illustrations stimulate, among other things, receptors responsible for stabilizing eye movements and "refreshing" the visual experience (which is why adults might perceive the illustrations as twitching or flickering). In the first stage of life, infants see "double" because each eye independently sends its view to the brain's center of sight, which hasn't yet learned to combine them into a single whole image. Among the illustrations, the Vernier optical phenomenon, featuring a central bright spot, instinctively "encourages" the brain to fuse images and coordinate eye movements. Babies adore gazing at it! The images are optometrically adjusted for viewing by infants from a distance of about 10 in (25 cm).