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Br J Ophthalmol doi:10.1136/bjo.2006.112607

Efficiency of Rarebit Perimetry in the Evaluation of Homonymous Hemianopia in Stroke Patients

  1. Dansal - Gedik (san06200{at}yahoo.com),
  2. Ahmet Akman (ahmetakman{at}yahoo.com),
  3. Yonca Akova (yoncaakova{at}yahoo.com)
  1. Baskent University Faculty of Medicine Department of Ophthalmology, Turkey
  2. Baskent University Faculty of Medicine Department of Ophthalmology, Turkey
  3. Baskent University Faculty of Medicine Department of Ophthalmology, Turkey
    • Published Online First 14 February 2007

    Abstract

    Background/aims: We aimed to compare the efficiency of RB perimetry and Humphrey Field Analyzer in detecting the homonymous hemianopia (HH) in stroke patients with occipital lobe infarcts.

    Materials and methods: Forty patients who suffered from visual complaints due to acute occipital lobe infarcts underwent visual field analysis on the same day, in random order; either first with Humphrey Perimetry 30-2, SITA standard program (Zeiss Humphrey Systems, CA, USA) or Rarebit perimetry. A visual field was classified to four quadrants for right and left eyes, superior temporal, superior nasal, inferior temporal and inferior nasal. The entire mean hit rate numbers (MHR) and mean deviation (MD) and pattern standard deviation (PSD) values were compared for each quadrant of the each eye.

    Results: The results of RB MHR and HFA MD values for each quadrant of the right and left eyes were highly correlated in all patients with HH (Pearson's r correlation coefficients for superior temporal, superior nasal, inferior temporal and inferior nasal quadrants of right and left eyes were 0.827, 0.833, 0.843, 0851 and 0.746, 0821, 0882, 0.824, respectively and a p value of <0.001 for all quadrants). The correlation between RB- MHR and HFA-PSD for each quadrant of both eyes was also highly correlated.

    Conclusion: RB perimetry is reliable, easily performed and quickly manageable and preferable test in patients with HH, which can be carried out under simple software programme and hardware and it easily detects extremely severe visual loss like HH in patients with occipital lobe lesions.

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