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From Wikipedia, the free encyclopedia

Pseudomyopia
SpecialtyOphthalmology Optometry
SymptomsBlurring of vision, asthenopia

Pseudomyopia (from ψεῦδο, "pseudo": false; and μυωπία "myopia": near sight) occurs when a spasm of the ciliary muscle prevents the eye from focusing in the distance, sometimes intermittently; this is different from myopia which is caused by the eye's shape or other basic anatomy. Pseudomyopia may be either organic, through stimulation of the parasympathetic nervous system, or functional in origin, through eye strain or fatigue of ocular systems. It is common in young adults who have active accommodation, and classically occurs after a change in visual requirements, such as students preparing for an exam, or a change in occupation.

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Transcription

Signs and symptoms

The following symptoms may be seen in patients with pseudomyopia

  • Blurring of distance vision: Intermittent blurring of distant vision after prolonged near work is the main symptom of pseudomyopia.
  • Asthenopia
  • Headache
  • Eyestrain
  • Photophobia[1]
  • Esotropia: Acute onset esotropia may occur in accommodative spasm, which is the common cause of pseudomyopia. [2]
  • Diplopia: Diplopia may occur due to esotropia or convergence spasm

The diagnosis is done by cycloplegic refraction using a strong cycloplegic like atropine or homatropine eye drops. Accommodative amplitude and facility may be reduced as a result of the ciliary muscle spasm.

There is a close correlation between unaided distance visual acuity and myopia; however, this correlation is not maintained in the presence of pseudomyopia, while pseudomyopia maybe presented as decrement of distance visual acuity.

Treatment

Treatment is dependent on the underlying aetiology. Organic causes may include systemic or ocular medications, brain stem injury, or active ocular inflammation such as uveitis. Functional pseudomyopia is managed though modification of working conditions, an updated refraction, typically involving a reduction of a myopic prescription to some lower myopic prescription, or through appropriate ocular exercises.

See also

References

  1. ^ "Pseudomyopia - symptoms". National Library of Medicine - false nearsightedness.
  2. ^ "Acute Adult Onset Comitant Esotropia Associated with Accommodative Spasm".
This page was last edited on 28 December 2023, at 13:14
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