How big should it be? A plain-language guide to sizing a contrast card
Getting the size right comes down to just two numbers — how well your child sees right now, and how far away the print will be — and one line of grade-school geometry does the…
Tagged #visual-angle
2 articles
Why the same contrast card won't work on the ceiling and the changing table
A pattern that's perfect 30 cm from your baby's face is an invisible grey blur on the ceiling 2 m away — because the eye sees angles, not sizes. Same baby, farther surface → the…