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Visual field defect after pars plana vitrectomy

H Yan1, L Dhurjon, D R Chow

  • 1Department of Ophthalmology, Tianjin Medical University Hospital, Peoples Republic of China.

Ophthalmology
|October 1, 1998
PubMed
Summary
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Visual field defects can occur after pars plana vitrectomy (PPV) for macular hole or subretinal neovascular membrane treatment. Air-fluid exchange during PPV may cause optic nerve trauma, leading to these visual field deficits.

Area of Science:

  • Ophthalmology
  • Retinal Surgery
  • Visual Neuroscience

Background:

  • Pars plana vitrectomy (PPV) is a common surgical procedure for various retinal conditions.
  • Visual field defects are a potential complication following intraocular surgery.
  • Understanding the incidence and causes of visual field defects after PPV is crucial for patient care.

Purpose of the Study:

  • To determine the occurrence of visual field defects after pars plana vitrectomy (PPV).
  • To investigate the association between PPV for specific conditions (macular hole, subretinal neovascular membrane, epiretinal membrane proliferation) and visual field defects.
  • To explore potential pathogenic mechanisms for observed visual field defects.

Main Methods:

  • A noncomparative case series design was employed.

Related Experiment Videos

  • Fifty eyes of 48 subjects undergoing PPV for macular hole (MH), subretinal neovascular membrane (SRNVM), or epiretinal membrane proliferation (EMP) were included.
  • Postoperative Goldmann kinetic perimetry was used to assess visual fields.

    • Main Results:

    • Eighteen percent (9 of 50 eyes) experienced visual field defects post-PPV.
    • Defects were more common in eyes treated for SRNVM (38%) and MH (19%) compared to EMP (0%).
    • Air-fluid exchange was a common factor in all eyes with visual field defects, suggesting a potential link to optic nerve trauma.

    Conclusions:

    • Visual field defects, both central and peripheral, can manifest after PPV for MH and SRNVM.
    • The air-fluid exchange procedure during PPV appears to be a significant factor in the development of these defects.
    • Optic nerve trauma during air-fluid exchange is the likely etiology for post-PPV visual field deficits.