Contrast Card Generator

What your baby can actually see, month by month

Vision is not switched on at birth — it is built over the first year, on a fairly predictable schedule, and knowing roughly where your baby is on it tells you what kind of picture is worth putting in front of them.

Established scienceUpdated Sep 1, 2026For parents

Well-supported by peer-reviewed research.

In one line

Vision is not switched on at birth — it is built over the first year, on a fairly predictable schedule, and knowing roughly where your baby is on it tells you what kind of picture is worth putting in front of them.

Key points

(All ages are corrected age if your baby arrived early — count from the due date, not the birth date. See Corrected age: reading a premature baby's vision by their due date.)

  • Birth to about 1 month — bold shapes, close up. Sharpness around 20/400; focus is best at roughly 20–30 cm, about the distance to your face during a feed. What works: large, high-contrast, black-and-white patterns held close. Brief eye-crossing moments are common at this age; an eye that is constantly turned is worth mentioning to your paediatrician.
  • Around 2 months — the preferences start moving. Acuity roughly doubles to ~20/300–20/200, smooth tracking of a slowly moving object begins, and babies start responding to arrangement, not just boldness. Red becomes distinguishable early in this window. What works: slightly finer patterns, faces (real and schematic), things that drift slowly sideways.
  • Around 3 months — finding and following. Focus adjusts across distances much better, tracking is smoother, and many babies start batting at what they see. What works: patterns with a path to follow — rows, spirals, repeating motifs — and a bit more fine structure.
  • Around 4–5 months — depth and colour fill in. Depth perception (using the two eyes together) comes online fairly suddenly in this window; blue and yellow, then green, join red. What works: busier patterns, real-object silhouettes, colour used with strong light-dark contrast.
  • Around 6 months — across the room. Acuity has climbed to very roughly 20/100–20/60; familiar people are recognised at a distance. What works: richer detail, and bigger prints further away — the same design, scaled for the distance.
  • 6–12 months — refinement. Sharpness keeps improving toward (but not reaching) adult levels; hand-eye coordination takes over the show. Full adult acuity arrives in the preschool years.

The one number that changes everything: distance

Every line above quietly assumes the picture is at a distance the baby can use. The same card that is perfect at 30 cm is an invisible smudge at 2 m for a newborn — visual size is what matters, and it falls with distance. That is the entire reason this generator asks how far away the print will hang before it draws a single line (Why the same contrast card won't work on the ceiling and the changing table).

The evidence

  • [established science] The acuity trajectory (≈20/400 at birth, rapid gains in the first six months, adult acuity in the preschool years) — AAO’s vision-development overview and the peer-reviewed reviews in the sources.
  • [established science] Tracking from ~2 months, depth perception around 3–5 months, recognition across a room around 5–6 months — AAO and paediatric hospital guidance.
  • [established science] Colour discrimination arrives in stages, red first in the early weeks-to-two-months window, broadly adult-like basics around 5–6 months. The fine print of exactly when varies by study and method; the ORDER is consistent.
  • [our design opinion] The mapping from these milestones to concrete pattern stages — which families unlock when, how fine each stage may go — is our synthesis of the research, tuned conservative. It is a design table, not a clinical instrument.

Practical takeaways

  • Match the picture to the stage, not the calendar aisle: bold and close for the first weeks; movement-friendly and slightly finer from ~2 months; paths to follow at ~3; colour and busier scenes from ~4–5; bigger and further away from ~6.
  • Re-generate as they grow. The right card changes every few weeks in the first months — that is the design working, not wearing out (The Goldilocks principle: matching pattern difficulty to the stage).
  • Use the milestones as a rough map, never a test. The ranges above are wide, and individual variation is normal.
  • Two things worth flagging to a professional rather than a website: an eye that is constantly turned, and any concern about whether your baby is seeing — trust your instinct and ask.

Caveats & disclaimer

Educational, not medical, and not a developmental assessment. Ages are population ranges — babies genuinely vary, and being early or late on any single line here means nothing by itself. If your baby was born prematurely, use corrected age throughout, and for any vision concern, an eye that stays turned, or a baby who does not seem to look at things, talk to your paediatrician or an eye-care professional.