A Comparison of Screening and N-30 Mode in Frequency Doubling Technology Perimetry.
- Author:
Chan Yun KIM
1
;
Dae Rho NA
;
Young Jae HONG
Author Information
1. Department of Ophthalmology, College of Medicine, Hallym University Sacred Heart Hospital.
- Publication Type:Original Article
- Keywords:
Frequency doubling perimetry;
Glaucoma;
N-30;
Screening
- MeSH:
Female;
Glaucoma;
Humans;
Male;
Mass Screening*;
Ocular Hypertension;
Pupil;
Refractive Errors;
Sensitivity and Specificity;
Visual Field Tests*
- From:Journal of the Korean Ophthalmological Society
2000;41(8):1753-1759
- CountryRepublic of Korea
- Language:Korean
-
Abstract:
FDT is known as a comfortable and convenient device, and there was no restriction in pupil size and refractive error within 7 diopters.To compare the effectiveness of secreening and N-30 mode in FDT, new field analyzer. Twenty-three POAG or ocular hypertension patients(43 eyes)were included in this study. All subjects underwent FDT screening and N-30 15 minutes apart on same day within 1 month after HFA C30-2 test. Mean age of the subjects was 49.77+/-11.61 years. Fifteen men and nine woman were included in this study. Test duration was 52.3+/-6.2 seconds with FDT screening, 5.46+/-0.32 minutes with FDT N-30, and 14.46+/-1.88 minutes with HFA C30-2.In global indexes MD and PSD of FDT N-30 were well correlated with MD, PSD, and CPSD of HFA C30-2 respectively(p<0.01). In diagnosing glaucoma, sensitivity of FDT screening and N-30 was 75% and 88%respectively, and specificity of screening and N-30 was 94%and 82%respectively. In detecting defect in each test location, sensitivity of FDT screening and N-30 was 68.6%and 81.6%respectively, and specificity of screening and N-30 was 94.5%and 83.8%respectively. FDT N-30 mode appears to be superior to FDT screening mode in screening and diagnosing glaucoma as there are high correlation with HFA C30-2, good sensitivity, and specificity inspite of longer test duration.
