Pseudomyopia
Blur That Is Not True Myopia
After hours of close work the focusing muscle can lock up, leaving distance vision blurred. It looks like myopia on a quick test, but the eye is not longer, and the blur can be reversed.
What is pseudomyopia?
Pseudomyopia is temporary short-sightedness caused by a spasm of the eye's focusing muscle after prolonged close work. Distance vision blurs, often varying through the day, but the eyeball is a normal length. It is confirmed with drops that relax the focus, and treated with vision therapy, focusing-relief lenses and better near-work habits.
- Cause
- Focusing muscle spasm
- Typical patient
- Students and heavy screen users
- Key test
- Refraction with focus-relaxing drops
- Reversible
- Yes
True Myopia Versus Pseudomyopia
| True myopia | Pseudomyopia | |
|---|---|---|
| Cause | Eye has grown longer | Focusing muscle will not relax |
| Blur | Constant for distance | Comes and goes, worse after close work |
| Other symptoms | Usually none | Headaches, eye strain, slow refocusing |
| With relaxing drops | Power stays | Power drops or disappears |
| Treatment | Correction and myopia control | Vision therapy and habit change |
Is the Day Overloading the Focus?
Set a typical day to see whether close work is outweighing breaks and daylight.
Day balance Move the sliders to score a typical day.
- Aim for two hours of daylight.
- Keep close work outside school to a sensible total.
- Break up close work every 20 minutes.
Targets follow widely used guidance: about two hours outdoors and a break from close work every 20 minutes.
Clues That Point to a Focusing Spasm
Suspect pseudomyopia when the story does not fit ordinary myopia.
- Distance blur that is worse in the evening or after exams
- Vision that clears after a holiday or a weekend outdoors
- A power that jumps at one test and falls at the next
- Headaches around the brow and tired, aching eyes
- Slow to refocus when looking up from a book
Power that goes up and down between tests? A focusing assessment shows whether a spasm is involved.
Where Vision Therapy Fits
Giving stronger minus glasses for a spasm can lock the problem in. The right approach is to relax and retrain the focusing system. Vision therapy uses lens and focusing activities to restore flexibility, often with a mild reading lens for close work and a plan for breaks.
Vision therapy does not cure true myopia. Its place is in treating the focusing and eye-teaming problems that sit alongside it, such as accommodative dysfunction and convergence insufficiency, which make close work harder and may add to progression risk.
True or Not?
Six quick statements 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.
-
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.
-
Eye exercises can cure myopia.
Not true. Exercises cannot shorten the eye. They help only when a focusing spasm is causing false myopia.
-
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.
-
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.
-
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
Can pseudomyopia become real myopia?
How is pseudomyopia diagnosed?
How long does pseudomyopia take to go away?
Can eye exercises cure myopia?
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.