Ocular defects in photosensitive epilepsy.

Ebere C. Anyanwu, John E Ehiri

Research output: Contribution to journalArticle

4 Citations (Scopus)

Abstract

Patients with photosensitive epilepsy are susceptible to seizures due to photoparoxysmal response (PPR). This response adversely precipitates factors that modify the functional status of the visual system. Such factors may or may not be evident superficially, but may lead to ocular defects due to trauma, hormonal imbalance, abnormal intraocular pressure (IOP), or any other reflex-inducing stimuli. The extent to which photosensitive epileptic patients suffer from PPR-related ocular defects has not been documented fully. In this investigation, ocular defects in patients with photosensitive epilepsy are studied using visual-evoked response (VER). A total of 212 photosensitive epileptic patients were studied to ascertain the magnitude and distribution of ocular defects using the changes in EEG and visual-evoked potential (VEP); 51% of the patients were female, the age range was 1-46 years. The major ocular defects and complications found were visual field defects, optic nerve abnormalities, nystagmus, cataracts, amblyopia, and migraine. These findings were analyzed according to age and sex. The relationship between the ocular abnormalities and the interpretations of the changes in the characteristics of the VEP indicated that optic-related atrophies, visual defects, optic neuritis, chiasmal compression, nystagmus, migraine headache, cataracts, and amblyopia were prevalent in photosensitive epileptic patients at varying degrees. The results showed that although ocular defects in photosensitive epilepsy may not be obvious differentially, VEP can be used in their diagnosis, contrary to earlier studies reporting that VEP is not of much value in epilepsy diagnosis.

Original languageEnglish (US)
Pages (from-to)159-166
Number of pages8
JournalTheScientificWorldJournal [electronic resource]
Volume4
StatePublished - Mar 12 2004
Externally publishedYes

Fingerprint

Reflex Epilepsy
Visual Evoked Potentials
defect
Defects
Bioelectric potentials
Amblyopia
Migraine Disorders
Optics
Cataract
Eye movements
abnormality
Eye Abnormalities
Optic Atrophy
Optic Neuritis
Optic Nerve
Visual Fields
Intraocular Pressure
Reflex
Electroencephalography
Epilepsy

ASJC Scopus subject areas

  • Biochemistry, Genetics and Molecular Biology(all)
  • Environmental Science(all)
  • Medicine(all)

Cite this

Ocular defects in photosensitive epilepsy. / Anyanwu, Ebere C.; Ehiri, John E.

In: TheScientificWorldJournal [electronic resource], Vol. 4, 12.03.2004, p. 159-166.

Research output: Contribution to journalArticle

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