Welcome back!

Crystal 🦊

Choose a game

🐻

Game 1 · Bears

Easy · flat

🔒

🐥

Game 2 · Chicks

Easy · flat

🔒

⊙⊙

Game 3 · EC1

Hard · cross

Choose a level (viewing distance)

🎯 starts at ~4 BO Δ (sep – cm @ – cm)

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Orca

Eye training for kids

🔑 Enter your access key

You'll find it in the email after purchase.
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Already unlocked on this device? Continue →

👋

Hi friend! What's your name?

Type your first name so we can cheer you on 🎉

Pick your buddy! 💕

This little friend will keep you company while you train.

CALIBRATION 1 / 2

📏 Screen size

Hold a credit card against your screen (landscape). Drag the yellow handles so the orange line matches the card's edges. Width = 8.56 cm.

Bar: 200 px → 37.4 px/cm

CALIBRATION 2 / 2

📐 Viewing distance

How far is your face from the screen? (a normal arm's length is around 40 cm)

cm

Mode: Game

Trials: –

Duration: 00:00

🎉

Session Complete

Crystal · today

Prism Diopters

Goal: –^Δ

Score: –^Δ

Prism Diopters · Goal vs This Session

Goal

This Session

This Session vs Last

–

correct

–

accuracy

–

best Δ

–

time

–

📈 Your progress

–

Convergence Δ over time

— best Δ - - goal

⭐ Stars achieved

+1 per session · bonus for ≥75% accuracy · ≥90% = double