RESEARCH ARTICLE


Testing Spatial Detection and Light Sensitivity in Homonymous Hemiano-pia by Rarebit and Conventional Automated Perimetry



Carlo Aleci* , Tiziana Usai
Department of Ophthalmology, Gradenigo Hospital, C.so R.Margherita 8, 10153 Turin, Italy


© Aleci and Usai; Licensee Bentham Open

open-access license: This is an open access article licensed under the terms of the Creative Commons Attribution Non-Commercial License (http://creativecommons.org/licenses/bync/3.0/), which permits unrestricted, non-commercial use, distribution and reproduction in any medium, provided the work is properly cited.

* Address correspondence to this author at the Department of Ophthalmology, Gradenigo Hospital, C.so R.Margherita 8, 10153 Turin, Italy; Tel: +39 340 000 3523; Fax: +39 (0)11 8151274; E-mail: carlo.aleci@h-gradenigo.it


Abstract

Purpose of the study was to compare Rarebit Perimetry (RP) with Standard Automatic Perimetry (SAP) in patients with ischemic retrochiasmal lesions. Seventeen patients with homonymous hemianopia underwent SAP and RP. Correlation between the two techniques was evaluated, congruent defects were quantified in the spared hemifield and residual vision areas were investigated in the blind hemifield. A strong correlation was found between SAP and RP. In the spared hemifield, RP detected congruent defects in a higher percentage of cases. Residual detection function has been found at RP in 69,2 % of perimetrically blind visual field quadrants as assessed by SAP. In conclusion, RP appears to be useful to assess visual function in hemianopic patients. As compared to SAP, it seems able to detect small congruent defects in a higher percentage of cases. Finally, a certain residual function seems to be present at RP in the blind regions of the visual field, however, for this finding further demonstrations are required.

Keywords: Hemianopia, rarebit perimetry, automated perimetry, congruent defect, residual visual function.