Lazy eye apps and games: do they work as well as the patch?

Your child has a lazy eye (amblyopia, mata malas), the patch is a daily battle, and someone has said there is a game for it. It is a fair question, and it deserves a straight answer from the trials rather than from advertising.

This article reports what randomised trials found, and where they disagree. It names no brand and no clinic, and it does not tell you to buy or avoid anything. A game is not a substitute for an examination and supervised care.

What are lazy eye apps and games, and how are they meant to work?

They are video games or films played with special glasses or goggles, so that each eye sees a slightly different picture. The word for this is dichoptic, meaning two eyes, two views. The idea is to make the weaker eye do more of the work while the two eyes are used together.

A patch works differently. It covers the stronger eye so the brain has to use the weaker one. Patching is well established: the NHS lists glasses, an eye patch over the stronger eye for a few hours a day for several months, and eye drops that blur the stronger eye as treatments. Digital treatments are newer, and the trials have to be read one by one.

Screen time is the other worry. The trials used prescribed sessions of 60 to 90 minutes a day, on a set schedule and with use recorded, so they are a different thing from ordinary tablet time. If you are already trying to limit screens at home, do not add a game without talking to your doctor first. Our article on screen rules that survive grandma's house gives the wider picture.

In a lazy eye the weaker eye did not develop full sight in early childhood, even though the eye itself may look normal. Our article on the hidden weak eye explains why it is easy to miss.

Do apps and games work as well as the patch?

It depends on which one, because the trials do not agree. A large trial of a general game could not show the game was as good as patching, and its improvement was smaller. Two later trials of a specific eye-tracking system, both using the same device, found it no worse than patching. So the honest answer is: sometimes, for some systems, in some children.

The trials also differ in age, in the type of lazy eye, in what the games were compared with, and in who paid for them. That is why one headline cannot settle it. Vision is measured in lines on an eye chart, and one line is a small but real step. Keep that scale in mind as you read the numbers below.

What did the 2016 game trial find?

It could not show the game was as good as patching. In a 2016 trial reported in JAMA Ophthalmology, 385 children aged 5 to under 13 were given either a binocular iPad game for an hour a day or two hours of patching, for 16 weeks. Vision in the weaker eye improved by 1.05 lines with the game and 1.35 lines with patching.

The researchers had set a limit for how much worse the game could be and still count as "not inferior". The game did not stay within it. The trial also found that only 39 of 176 children with usable records, about 22 per cent, played more than 75 per cent of the prescribed time. Both groups improved, more so in younger children.

In 2020 the American Academy of Ophthalmology reviewed the binocular literature. It reported that two large trials showed inferior results compared with patching, that five larger, better-designed studies failed to show an advantage, and concluded that binocular therapy cannot be recommended as a replacement for standard treatment, while saying more research is needed. That report predates the newer trials below.

What did the newer trials find?

Newer trials of specific systems are more encouraging. Three are worth knowing, and each carries limits you should hear along with the good news.

A 2022 trial in 105 children aged 4 to 7 at 21 sites in the United States compared a home digital treatment plus full-time glasses with glasses alone. After 12 weeks, vision in the weaker eye improved by 1.8 lines with the treatment and 0.8 lines with glasses alone, and it was stopped early for success under its plan. Note the comparison: it was against glasses alone, not against patching.

A 2023 trial randomised 103 children aged 4 to under 9 to an eye-tracking home treatment for 90 minutes a day, five days a week for 16 weeks, or to two hours of patching a day. The treatment was not worse than patching by the trial's margin of one line. Adherence was 91 per cent against 83 per cent. The paper carries a commercial disclosure.

A 2025 trial of the same type of system enrolled 149 children aged 4 to under 9 with lazy eye from unequal glasses power, a small squint or both. It was not worse than patching, and in the group who followed the plan closely it did slightly better, by a very small 0.05 on the measurement scale, roughly half a line. Median adherence was 94.0 per cent against 83.9 per cent.

These trials studied particular devices, in particular children, for 12 to 16 weeks. They do not tell you about a free game from an app store, and they do not show long-term results.

Why does adherence matter so much?

Because a treatment only works if it is used. A patch left in the drawer does nothing, and so does a game that is never played. In the two newer trials that compared the two, children used the digital treatment more than they used the patch. In the older game trial, most did not play enough of it.

This is the real reason parents ask about games. If your child refuses the patch, the honest options are not "patch or game". The first step is to tell the clinic what is happening, because dose, timing and the way you set it up can often be changed. Our article on helping your child wear the patch has practical ideas that come from families, not from a device.

Timing matters too. The NHS says treatment should ideally start before the age of 7, while vision is still developing. The American Association for Pediatric Ophthalmology and Strabismus (AAPOS) says starting in younger teenagers, up to age 14, can still help, though not as much as earlier. If a lazy eye was found late, read what lazy eye treatment can still do.

What should I ask my eye doctor about apps and games?

Ask whether your child is a candidate, which specific system has been tested in children like yours, and how progress will be measured. Do not start a game on your own instead of glasses or patching that has been prescribed.

This article cannot tell you whether any digital treatment is sold, registered or priced in Malaysia, and none of the sources read for it says so. Do not assume it is. Ask the clinic, and ask whether the device has regulatory approval where you live.

Useful questions are: Would my child qualify, given the type and age of the lazy eye? Was this system tested against patching or against glasses alone? Who will watch the results, and how often will you see my child? What do we do if my child does not use it? Glasses may already be doing part of the work, and the day you find out describes what the first steps look like.

Some parents also ask about eye exercises and vision therapy in general, which are a different question from dichoptic games. Eye exercises and vision therapy, what the evidence says covers them.

Common questions

References

1. Randomized Controlled Trial of a Dichoptic Digital Therapeutic for Amblyopia, Ophthalmology 2022 (PubMed 34534556) · pubmed.ncbi.nlm.nih.gov
2. An Eye-Tracking-Based Dichoptic Home Treatment for Amblyopia: A Multicenter Randomized Clinical Trial, Ophthalmology 2023 (PubMed 36306974) · pubmed.ncbi.nlm.nih.gov
3. High-Adherence Dichoptic Treatment Versus Patching in Anisometropic and Small Angle Strabismus Amblyopia: A Randomized Controlled Trial, Am J Ophthalmol 2025 (PubMed 39179129) · pubmed.ncbi.nlm.nih.gov
4. Effect of a Binocular iPad Game vs Part-time Patching in Children Aged 5 to 12 Years With Amblyopia, JAMA Ophthalmology 2016 (PubMed 27812703) · pubmed.ncbi.nlm.nih.gov
5. Binocular Treatment of Amblyopia: A Report by the American Academy of Ophthalmology, Ophthalmology 2020 (PubMed 31619356) · pubmed.ncbi.nlm.nih.gov
6. AAPOS: Amblyopia · aapos.org
7. NHS: Lazy eye · www.nhs.uk

By Dr Chan Li Yen. General information only. It does not replace a consultation. If you are worried about your child's eyes or vision, please see an eye doctor.