Orca turns cross-fusion exercises into a colourful game. Designed for kids with binocular-vision difficulties โ supervised, evidence-based, and fun.
No glasses, no equipment. Just a laptop or tablet and 5 minutes a day.
Trains BO (base-out) demand using free-space EC1 cards.
Pet, levels, chapters, daily streaks โ kids ask to play.
Each session: accuracy, BO ฮ, time. Export CSV for therapist.
Random target positions prevent kids from guessing.
Short enough to keep attention, long enough to make gains.
Each session starts at last session's struggle point.
One-time payment, 3 months access. Includes therapist progress export.
Crystal Wong is an HK-based optometrist and PhD candidate at PolyU researching binocular vision. Orca grew out of her clinic work โ every kid she saw struggling with cross-fusion deserved something more engaging than a printed card.
This is an early version. Your feedback directly shapes what comes next.
Cross-fusion (convergence) at varying base-out (BO) prism demand. The kid learns to converge their eyes onto a single fused image despite increasing horizontal disparity.
Orca itself is glasses-free โ no red/green lenses or 3D goggles needed. However, if your child normally wears glasses (their habitual condition), they should wear them while training.
No. It's a complementary home-training tool. Always check with your child's optometrist before starting.
20 trials, usually 3-5 minutes. Sessions auto-end so kids don't over-strain.
Designed for ages 4+. Younger kids may need parental guidance for the cross-fusion technique.
Email hello@orcasee.com with your purchase ID โ we usually reply within 24h.