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Related Experiment Video

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Visual field defects after temporal lobe resection for epilepsy.

Alvilda T Steensberg1, Ane Sophie Olsen2, Minna Litman3

  • 1Department of Drug Design and Pharmacology, Copenhagen University Hospital, Denmark; Epilepsy Clinic, Department of Neurology, Copenhagen University Hospital, Rigshospitalet, Denmark.

Seizure
|November 25, 2017
PubMed
Summary
This summary is machine-generated.

Visual field defects (VFDs) are common after temporal lobe epilepsy surgery, impacting driving ability. Standard bedside tests miss many VFDs, highlighting the need for advanced methods like web-based visual field testing.

Keywords:
Campimetry onlineEpilepsy surgeryHumphrey perimetryTemporal lobe resectionVisual field defect

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Area of Science:

  • Ophthalmology
  • Neurology
  • Medical Technology

Background:

  • Epilepsy surgery, particularly in the temporal lobe, can lead to visual field defects (VFDs).
  • Assessing VFDs is crucial for patient quality of life and safety, especially concerning driving ability.

Purpose of the Study:

  • To evaluate visual field defects (VFDs) in patients post-temporal lobe epilepsy surgery.
  • To compare the efficacy of different visual field testing methods.
  • To correlate objective findings with subjective patient symptoms.

Main Methods:

  • Humphrey Field Analyzer (HFA) perimetry as the gold standard.
  • Web-based Damato Multifixation Campimetry Online (DMCO) testing.
  • Bedside confrontation visual field testing (ad modum Donders).
  • Patient questionnaires on subjective visual complaints.

Main Results:

  • A significant prevalence of VFDs (76%) was detected post-surgery using HFA.
  • Bedside testing showed low sensitivity (13%) for VFD detection.
  • Web-based DMCO demonstrated higher sensitivity (88%) for severe VFDs.
  • Only 28% of patients with VFDs reported subjective symptoms.

Conclusions:

  • VFDs are a frequent complication of temporal lobe epilepsy surgery, potentially affecting driving eligibility.
  • Subjective symptoms and bedside tests are insufficient for detecting VFDs.
  • Web-based visual field tests show promise, but HFA perimetry remains essential for driving standard assessment.
  • Patients emphasize the mandatory nature of VFD information.