• Users Online: 782
  • Home
  • Print this page
  • Email this page
Year : 2009  |  Volume : 57  |  Issue : 5  |  Page : 365-370

Retinal nerve fiber layer thickness analysis in suspected malingerers with optic disc temporal pallor

Department of Ophthalmology, Gulhane Military Medical Academy, Ankara, Turkey

Correspondence Address:
Gungor Sobaci
Gulhane Askeri Tip Akademisi, Goz Hastaliklari A.D, 06018 Etlik-Ankara
Login to access the Email id

Source of Support: None, Conflict of Interest: None

DOI: 10.4103/0301-4738.55077

Rights and Permissions

Purpose: To investigate the value of temporal retinal nerve fiber layer (RNFL temporal ) thickness in the prediction of malingering. Materials and Methods: This prospective, cross-sectional study was conducted on 33 military conscripts with optic disc temporal pallor (ODTP) and 33 age-and sex-matched healthy controls. Initial visual acuity (VA i ) and visual acuity after simulation examination techniques (VA aset ) were assessed. The subjects whose VA aset were two or more lines higher than VA i were determined as malingerers. Thickness of the peripapillary RNFL was determined with OCT (Stratus OCT™, Carl Zeiss Meditec, Inc.). RNFL temporal thickness of the subjects were categorized into one of the 1+ to 4+ groups according to 50% confidence interval (CI), 25% CI and 5% CI values which were assessed in the control group. The VAs were converted to LogMAR-VAs for statistical comparisons. Results: A significant difference was found only in the temporal quadrant of RNFL thickness in subjects with ODTP ( P =0.002). Mean LogMAR-VA increased significantly after SETs ( P <0.001). Sensitivity, specificity, positive and negative predictive values of categorized RNFL temporal thickness in diagnosing malingering were 84.6%, 75.0%, 68.8%, 88.2%, respectively. ROC curve showed that RNFL temporal thickness of 67.5 µm is a significant cut-off point in determining malingering ( P =0.001, area under the curve:0.862). The correlations between LogMAR-VAs and RNFL temporal thicknesses were significant; the correlation coefficient for LogMAR-VA i was lower than the correlation for LogMAR-VA aset (r=-0.447, P =0.009 for LogMAR-VA i ; r=-0.676, P <0.001 for LogMAR-VA aset ). Conclusions: RNFL temporal thickness assessment may be a valuable tool in determining malingering in subjects with ODTP objectively.

Print this article     Email this article
 Next article
 Previous article
 Table of Contents

 Similar in PUBMED
   Search Pubmed for
   Search in Google Scholar for
 Related articles
 Citation Manager
 Access Statistics
 Reader Comments
 Email Alert *
 Add to My List *
 * Requires registration (Free)

 Article Access Statistics
    PDF Downloaded445    
    Comments [Add]    
    Cited by others 2    

Recommend this journal