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[Cognitive evoked potential in primary wide angle glaucoma].

I Zarazaga1, J A Cristóbal, M A Broto

  • 1Servicio de Oftalmología, Hospital Clínico Universitario Lozano Blesa, Zaragoza, 50009, España.

Revista De Neurologia
|July 23, 2002
PubMed
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Primary wide angle glaucoma (PWAG) patients exhibit visual cognitive dysfunction affecting attention and memory. This study utilized P300 visual evoked potentials and cognitive exams to assess these deficits in glaucoma patients.

Area of Science:

  • Ophthalmology and Neuroscience
  • Cognitive Evoked Potentials
  • Visual Processing

Context:

  • Primary wide angle glaucoma (PWAG) is a common optic neuropathy leading to irreversible vision loss.
  • Early stages of PWAG are asymptomatic, often presenting with significant visual field deficits.
  • Neuropsychiatric and cognitive changes, including dementia and defensive reactions, have been anecdotally linked to PWAG.

Purpose:

  • To investigate visual processing disorders in PWAG patients.
  • To assess alterations in attention and working memory using P300 visual cognitive evoked potentials.
  • To correlate P300 findings with cognitive performance using Lobo's cognitive mini-exam (CME).

Summary:

  • Sixty-eight PWAG patients and 68 controls (50-65 years) underwent electroretinography, visual evoked potentials (VEPd), and P300 testing, alongside the CME.

Related Experiment Videos

  • PWAG patients showed significantly altered electroretinogram amplitudes and VEPd latencies.
  • P300 testing revealed significant latency alterations in PWAG patients, indicating cognitive processing deficits beyond peripheral visual effects.

    • Impact:

    • This research highlights a visual cognitive dysfunction in PWAG that impacts memory and attention.
    • Findings suggest that cognitive deficits in PWAG are not solely attributable to peripheral visual field loss.
    • The study underscores the utility of P300 evoked potentials in evaluating cognitive function in glaucoma patients.