Document Detail

Learning effect of standard automated perimetry in healthy individuals.
MedLine Citation:
PMID:  18797662     Owner:  NLM     Status:  MEDLINE    
PURPOSE: To evaluate the learning effect in standard automated perimetry using SITA strategy, central 24-2 program, possible associated factors and spatial distribution in individuals with no perimetry experience. METHODS: A total of 55 healthy subjects were submitted to Humphrey perimetry in two different sessions in one day. Reliability and global indices, and threshold sensitivity at each point were compared between the two examinations. The influence of potential factors (age, gender, and educational level) and the spatial distribution were evaluated regarding alterations between these two examinations. RESULTS: The duration of the test was longer in the first session (median, 5.7 min; interquartile range [IQR], 1.7 min) than in the second (median, 5.3; IQR, 1.1 min) (p=0.002). The median (IQR) of false negative errors was 2% (6%) in the first examination and 0% (6%) in the second (p=0.04). The mean (standard deviation) in the mean deviation (MD) global index was -2.31 (1.86) dB in the first examination and -1.73 (1.69) dB in the second (p=0.07). No association was observed between the change in MD and age (p=0.29), gender (p=0.69) and educational level (p=0.27). The changes in threshold sensitivity were greater at the peripheral points than at the central points (p<0.001). CONCLUSION: The threshold sensitivity increased in the second examination compared to the first. No factors were associated with this change. The changes in threshold sensitivity were more evident at the peripheral points.
Dinorah Piacentini Engel Castro; Juliana Kawase; Luiz Alberto Soares Melo
Publication Detail:
Type:  Journal Article    
Journal Detail:
Title:  Arquivos brasileiros de oftalmologia     Volume:  71     ISSN:  1678-2925     ISO Abbreviation:  Arq Bras Oftalmol     Publication Date:    2008 Jul-Aug
Date Detail:
Created Date:  2008-09-17     Completed Date:  2009-06-25     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  0400645     Medline TA:  Arq Bras Oftalmol     Country:  Brazil    
Other Details:
Languages:  eng     Pagination:  523-8     Citation Subset:  IM    
Department of Ophthalmology, Universidade Federal de São Paulo, São Paulo, SP, Brasil.
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MeSH Terms
Educational Status
False Negative Reactions
Glaucoma / diagnosis*
Middle Aged
Perimetry / methods*
Sensitivity and Specificity
Sensory Thresholds
Statistics, Nonparametric
Time Factors
Visual Fields / physiology

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