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The effect of perimetric experience in normal subjects
A Heijl1, G Lindgren, J Olsson
1Department of Ophthalmology, University of Lund, Malmö General Hospital, Sweden.
Archives of Ophthalmology (Chicago, Ill. : 1960)
|January 1, 1989
Summary
Automated static threshold perimetry results improve with training, especially for inexperienced subjects. Repeated testing is crucial for accurate visual field assessment, as initial results can be misleading.
Area of Science:
- Ophthalmology
- Visual Neuroscience
Background:
- Automated static threshold perimetry is a key diagnostic tool in ophthalmology.
- Understanding learning effects in perimetry is essential for accurate visual field assessment.
Purpose of the Study:
- To investigate the impact of experience and training on automated static threshold perimetry results.
- To determine the reliability of initial perimetric tests in normal subjects.
Main Methods:
- Two groups of normal subjects underwent repeated automated static threshold perimetry.
- Perimetric data was analyzed to assess the influence of experience and training.
Main Results:
- Perimetric results varied with experience; however, most subjects showed minimal effects.
- Initial tests frequently revealed depressed points, with sensitivity increasing after training.
- Learning effects were more significant in peripheral visual fields compared to paracentral areas.
Conclusions:
- Repeated perimetric testing is recommended for inexperienced patients, especially when initial results conflict with clinical findings.
- Concentric visual field constriction on initial tests warrants suspicion.
- A single perimetric test may be insufficient as a baseline for clinical monitoring.