How far can a 4-m.o. see? Also, can they now see all colors or still red, blue, black and white?

By 4 months, your baby’s range of vision has increased to several meters or more, and it will continue to expand until, at about seven months, her eyesight will be more nearly mature. She’ll also learn to follow faster movements with her eyes. For e.g. when you roll a ball, she'll be able to follow the movements of the ball. Babies can see colour from birth, but they have difficulty distinguishing similar tones, such as red and orange. They can tell the difference between very different colours such as red, green, and yellow. As a result, younger babies often prefer black and white or high-contrast patterns. At your baby's age, color differences become clearer, and your baby has started to distinguish between similar shades. https://www.healthychildren.org/English/ages-stages/baby/Pages/Your-Babys-Vision-4-to-7-Months.aspx