Why Islamic geometry suits infant eyes
The eight-point star and the girih grid were designed for repetition, symmetry and clarity. So is a newborn's visual diet.
When we started sketching Stage 1, we did not set out to make an Islamic version of a black-and-white baby card. We set out to make a good black-and-white baby card, and kept arriving at shapes that were already in the tradition.
The research on infant visual preference is fairly consistent: babies look longest at bold edges, at symmetry, at moderate complexity — patterned enough to hold attention, simple enough to resolve. Too plain and they lose interest in a second. Too busy and they never lock on at all.
Islamic geometric ornament sits almost exactly in that band. The eight-point star is radially symmetric with hard straight edges. Girih interlacing repeats at a scale a baby can track. The crescent is a single clean curve. The muqarnas cell is self-similar at two scales at once.
None of this was designed with infant neurology in mind. It came from a completely different set of concerns — the aversion to figurative representation, the mathematics of tiling a surface, the meditative pull of pattern. But the constraints produced forms that happen to be near-ideal for an eight-week-old.
The other reason
There is a second reason, and it is not scientific.
A Muslim child will grow up seeing these shapes. On the masjid wall, on the prayer rug, in the border of a mushaf, in the tilework of a grandmother's floor. When the first images a baby ever focuses on are drawn from that same visual language, the language stops being something introduced later and starts being something that was simply always there.
That is a small thing. But small things at eight weeks old are not really small.