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Effect of myopia on frequency-doubling perimetry
A Ito1, H Kawabata, N Fujimoto
1Department of Ophthalmology, Chiba University School of Medicine, Japan. itoua@ophthalm.m.chiba-u.ac.jp
Investigative Ophthalmology & Visual Science
|March 29, 2001
Summary
Frequency-doubling perimetry (FDP) is a reliable tool for assessing visual fields, even in individuals with myopia. Lens correction ensures accurate FDP results, making it suitable for diverse patient populations.
Area of Science:
- Ophthalmology
- Visual electrophysiology
- Perimetry
Background:
- Myopia can influence visual field testing results.
- Frequency-doubling perimetry (FDP) is used to detect visual field defects.
- Understanding myopia's impact on FDP is crucial for accurate diagnosis.
Purpose of the Study:
- To evaluate the effect of myopia on frequency-doubling perimetry (FDP) results.
- To determine if lens correction mitigates myopia's influence on FDP.
- To assess FDP's utility in myopic individuals, including those with glaucoma.
Main Methods:
- Sixty emmetropic and myopic volunteers were grouped by refractive error: low, intermediate, and high myopia.
- Subjects underwent visual field testing using FDP and Humphrey Field Analyzer (HFA) with appropriate refractive correction.
- Analysis included comparing mean sensitivity (MS), mean deviation (MD), and pattern standard deviation (PSD) across groups.
Main Results:
- HFA testing showed decreased MS and MD with increasing myopia.
- FDP testing revealed no significant differences in MS, MD, or PSD across myopia groups.
- Refractive error correlated with MS and MD only for HFA results, not FDP.
Conclusions:
- Lens-corrected myopia does not alter visual field results obtained by FDP.
- FDP is a reliable visual field testing method that can be used irrespective of myopia.
- This finding supports the use of FDP in clinical settings for patients with varying degrees of myopia.