Red Light Therapy
for Myopia
The newest idea in myopia control: a child looks into a desktop device that shines low-level red light for three minutes, twice a day. Early results are strong. The safety evidence is still catching up.
Does red light therapy work for myopia?
Repeated low-level red light therapy has slowed myopia progression and eye growth in several clinical trials in children, in some cases more than established treatments. However, the trials are short, rebound after stopping has been reported, and there are isolated reports of retinal injury. Most experts regard it as promising but not yet a routine first-line treatment.
- Session
- 3 minutes, twice a day
- Evidence so far
- Trials of 1 to 2 years
- Main concern
- Long-term retinal safety
- Status
- Emerging, specialist-supervised only
What the Device Does
The child sits at a small desktop unit and looks at a red light of a specific wavelength, around 650 nanometres, for three minutes. This is repeated twice a day, at least four hours apart, five days a week.
The leading theory is that the light increases blood flow in the layer behind the retina, thickening it and countering the stretching that goes with eye growth. The mechanism is not fully settled.
Promising Results With Open Questions
What the studies show, and what they do not yet show:
- Trials of one to two years report strong slowing of eye growth
- Some children show a small shortening of the eye, which is unusual for any treatment
- Faster progression after stopping has been seen, so rebound is a real question
- Isolated cases of retinal damage have been published
- There is no long-term follow-up into adulthood yet
Considering a newer treatment? Start with a measurement of how fast the power is really changing.
Start With the Established Options
See which proven treatments fit your child before considering a newer one.
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Myopia control glasses
Read how it works and who it suits.
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Low-dose atropine drops
Read how it works and who it suits.
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Orthokeratology (overnight lenses)
Read how it works and who it suits.
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Daytime control contact lenses
Read how it works and who it suits.
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Outdoor time and screen habits
Read how it works and who it suits.
General guidance from published research. Suitability is confirmed at an assessment.
How to Think About It as a Parent
For most children the sensible order is to begin with a treatment that has years of safety data behind it: control glasses, low-dose atropine, orthokeratology or control contact lenses.
Red light therapy should only be used with a device made for the purpose, under an eye specialist who examines the retina regularly. Never use red laser pointers, panels sold for skin care or any home device not designed for the eyes. Stop and seek an examination at once if a child reports a lasting after-image, a dark spot or blurred central vision.
It is not the same as optometric syntonic phototherapy, which uses coloured light through filters and works in a different way.
True or Not?
Check six common beliefs about myopia.
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Wearing glasses makes the eyes weaker.
Not true. Correct glasses do not weaken the eyes or speed up myopia. Deliberately under-correcting a child has been shown to make progression slightly faster.
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Special lenses can slow a child's power from rising.
True. Myopia control spectacle lenses and contact lenses slowed progression by about half in clinical trials.
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Eye exercises can cure myopia.
Not true. Exercises cannot shorten the eye. They help only when a focusing spasm is causing false myopia.
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Time outdoors lowers a child's chance of becoming short-sighted.
True. About two hours of daylight a day reduces the risk of myopia starting. Bright light is the reason, not exercise.
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After laser surgery, the risks of high myopia are gone.
Not true. Surgery corrects the focus but the eye stays the same length, so the retina still needs regular checks.
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Sitting close to the TV causes myopia.
Not true. Sitting close is usually a sign that a child already cannot see clearly. Long hours of any close work do add to the risk.
Answers reflect current published evidence.
Treatments
Questions Families Ask
Is red light therapy safe for children's eyes?
Is red light therapy better than atropine?
Can I use a red light device at home without a doctor?
Does the myopia come back after stopping red light therapy?
Find Out Where the Power Is Heading
A myopia assessment measures the current power, checks how the eyes focus and work together, and sets out the options that fit. In clinic in Chennai and Hyderabad, with online consultations across India.