High-contrast prints, sized for the eyes that will see them

A free, public, all-ages tool that generates printable high-contrast visual-stimulation images — correctly sized for the viewer's visual ability and the distance to the surface they’ll look at. Every case reduces to (effective acuity, viewing distance, print medium) — acuity from a guided path (age + prematurity / corrected age) or a direct path (a measured acuity).

First time printing? Run the print-scale check once to confirm your printer outputs at true size.

Who it's for

Typical and premature infants, children and adults with low vision or CVI (cortical/cerebral visual impairment), older children, and vision-therapy or sensory contexts.

How it works (and what it isn't)

• Runs entirely in your browser. No accounts; images you upload never leave your device.
• Exact physical scale. Printed output is verified at 100% / actual size with a scale bar.
• Not a medical device. It's an informed enrichment / accessibility tool, not a diagnostic or therapeutic one. For premature, CVI, or low-vision care, follow your clinicians.

🌱 Early build — a full stage-aware pattern library, one-click presets, card sets, tiling for large displays, staged colour, on-device custom-image upload, a printed usage & safety sheet, shareable design links, and an installable offline (PWA) build are live. Follow along on the blog, where we share the research and design thinking behind every choice.