A new optotype chart for detection of nonorganic visual loss 1 1Neither of the authors has financial interest in the new optotype charts.

Mojon, Daniel S.; Flueckiger, Petra

doi:10.1016/s0161-6420(01)01050-8

Cited by 22 publications

(3 citation statements)

References 8 publications

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“…While numerous tests have been developed for nonorganic visual acuity loss [10,11,12,13,14], only few tests exist for NVFL [4, 7]. For concentric NVFL, performing kinetic perimetry at two different distances is useful because it often helps to differentiate between organic and nonorganic origin.…”

Section: Discussionmentioning

confidence: 99%

Stimulus Parameters for Goldmann Kinetic Perimetry in Nonorganic Visual Loss

Ebneter

Pellanda²,

Kunz³

et al. 2009

Ophthalmologica

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Objective: To investigate the influence of the stimulus parameters on perimetry at various distances and draw conclusions for the clinical exploration of nonorganic visual loss. Methods: Visual field testing using Goldmann kinetic perimetry was performed on 15 healthy volunteers. The I/1e isopter at 33 cm was compared to the I/1e, II/1e and I/2e isopters at 66 cm. The 0/1e isopter at 33 cm was compared to the 0/1e, I/1e and 0/2e isopters at 66 cm. Results: Doubling the examination distance without adjusting the stimulus parameters resulted in significant perimetric visual field constriction. Doubling the stimulus diameter resulted in perimetric visual field expansion by a factor of 2.26 and 3.32 for I/1e and 0/1e, respectively. Increasing stimulus luminance by a factor of 3.17 caused expansion by a factor of 2.15 and 2.32 for I/1e and 0/1e, respectively. Conclusions: To avoid falsely diagnosing visual field constriction, stimulus parameters need to be adjusted when visual field testing is performed at double distance. Increasing stimulus luminance was more appropriate than augmenting stimulus size.

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Section: Discussionmentioning

confidence: 99%

Stimulus Parameters for Goldmann Kinetic Perimetry in Nonorganic Visual Loss

Ebneter

Pellanda²,

Kunz³

et al. 2009

Ophthalmologica

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“…After VA i , best-performed VA or VA aset (visual acuity after simulation examination techniques: SETs) was assessed after certain technical procedures and behavioral observations, which use fogging, dissociation, and fixation techniques employed for detection of malingering included pupillary light reflexes, grimacing in front of the subject,[13] prism dissociation test,[78] polarizing lenses,[910] distance test,[69] bar-reading test (Javal-Cuignet),[69] two-perpendicular cylinder test,[6] Harlan test,[69] VA repetition test,[61611] hand shaking test,[6] and a new optotype chart introduced by Mojon et al . [12] VA i and the VA aset were checked by the experienced clinician (SG) unaware of the VA i. , and included in the study if the same results were obtained. Any positive result of SETs was accepted enough to reveal malingering.…”

Section: Methodsmentioning

confidence: 99%

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

Civelekler

Halili

Gündoğan

et al. 2009

Indian J Ophthalmol

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Purpose:To investigate the value of temporal retinal nerve fiber layer (RNFLtemporal) 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 (VAi) and visual acuity after simulation examination techniques (VAaset) were assessed. The subjects whose VAaset were two or more lines higher than VAi were determined as malingerers. Thickness of the peripapillary RNFL was determined with OCT (Stratus OCT™, Carl Zeiss Meditec, Inc.). RNFLtemporal 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 RNFLtemporal thickness in diagnosing malingering were 84.6%, 75.0%, 68.8%, 88.2%, respectively. ROC curve showed that RNFLtemporal 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 RNFLtemporal thicknesses were significant; the correlation coefficient for LogMAR-VAi was lower than the correlation for LogMAR-VAaset (r=−0.447, P=0.009 for LogMAR-VAi; r=−0.676, P<0.001 for LogMAR-VAaset).Conclusions:RNFLtemporal thickness assessment may be a valuable tool in determining malingering in subjects with ODTP objectively.

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“…By using an optotype chart for detection of nonorganic visual loss designed by DSM [8] (for unilateral and symmetric bilateral VA loss).…”

Section: Methodsmentioning

confidence: 99%

Distance doubling visual acuity test: A reliable test for nonorganic visual loss

Zinkernagel

Mojon

2008

Graefes Arch Clin Exp Ophthalmol

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A new optotype chart for detection of nonorganic visual loss 1 1Neither of the authors has financial interest in the new optotype charts.

Cited by 22 publications

References 8 publications

Stimulus Parameters for Goldmann Kinetic Perimetry in Nonorganic Visual Loss

Stimulus Parameters for Goldmann Kinetic Perimetry in Nonorganic Visual Loss

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

Distance doubling visual acuity test: A reliable test for nonorganic visual loss

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