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Related Experiment Videos

The visual field following acute primary angle closure.

T Aung1, A L Looi, P T Chew

  • 1Singapore National Eye Centre, Tan Tock Seng Hospital, Singapore, National University of Singapore. tin11@pacific.net.sg

Acta Ophthalmologica Scandinavica
|June 13, 2001
PubMed
Summary
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A study found 38% of patients experienced visual field loss six months after acute primary angle closure (APAC). Prompt treatment of APAC may prevent permanent vision loss, with risk factors including pre-existing glaucoma and delayed symptom recognition.

Area of Science:

  • Ophthalmology
  • Visual Sciences

Background:

  • Acute primary angle closure (APAC) is an ophthalmic emergency.
  • Understanding long-term visual consequences is crucial for patient management.

Purpose of the Study:

  • To assess visual field loss frequency and type 6 months post-APAC.
  • To identify risk factors associated with visual field defects after APAC.

Main Methods:

  • Cross-sectional observational study.
  • Static automated threshold perimetry performed 6 months after APAC.
  • Data collected from two Singapore hospitals over one year.

Main Results:

  • 38% of patients exhibited significant visual field defects 6 months post-APAC.
  • Hemifield defects, indicative of nerve fiber bundle loss, were most common.

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  • Risk factors included pre-existing glaucoma, elevated intraocular pressure during follow-up, and symptom duration >7 days.
  • Conclusions:

    • Visual field loss 6 months after APAC occurred in 38% of cases.
    • Prompt and adequate treatment of APAC may prevent significant, blinding visual impairment.
    • Most eyes showed no detectable functional damage, suggesting a positive prognosis with timely intervention.