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Learning effect for frequency doubling perimetry in patients with glaucoma
Naoya Fujimoto1, Katsuyuki Minowa, Osamu Miyauchi
1Department of Ophthalmology and Visual Science, Chiba University Graduate School of Medicine, Chiba, Japan. fujimoto@ophthalm.m.chiba-u.ac.jp
American Journal of Ophthalmology
|January 29, 2002
Summary
Patients with glaucoma showed a learning effect on frequency doubling perimetry (FDP). Repeated FDP testing improved mean deviation results, indicating enhanced performance with experience.
Area of Science:
- Ophthalmology
- Visual Science
Background:
- Glaucoma is a progressive optic neuropathy.
- Frequency doubling perimetry (FDP) is a visual field test used in glaucoma assessment.
- Understanding learning effects in FDP is crucial for accurate diagnosis and monitoring.
Purpose of the Study:
- To investigate the learning effect of repeated frequency doubling perimetry (FDP) in patients with glaucoma.
- To determine if initial FDP test results differ significantly from subsequent tests.
Main Methods:
- Prospective observational study involving 33 glaucoma patients.
- Patients underwent three FDP examinations over a 6-month period.
- Comparison of mean deviation (MD), pattern standard deviation (PSD), and intraocular pressure (IOP) across tests.
Main Results:
- A significant difference was observed between the first and second FDP tests (P = 0.029) and the first and third tests (P = 0.049) for mean deviation.
- No significant differences were found for pattern standard deviation or intraocular pressure.
- The mean deviation improved from -7.96 dB (test 1) to -7.29 dB (test 2) and -7.36 dB (test 3).
Conclusions:
- A positive learning effect was demonstrated for frequency doubling perimetry in glaucoma patients.
- The learning effect was primarily evident in the mean deviation results between the initial and subsequent tests.
- This suggests that initial FDP results in glaucoma patients may underestimate visual field status due to a learning effect.