| A Comparison of Screening and N-30 Mode in Frequency Doubling Technology Perimetry. |
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Chan Yun Kim, Dae Rho Na, Young Jae Hong |
1Department of Ophthalmology, College of Medicine, Hallym University Sacred Heart Hospital.
2The Institute of Vision Research, Yonsei University College of Medicine, Seoul, Korea.
3Department of Ophthalmology, Yonsei University College of Medicine, Seoul, Korea. |
| Frequency Doubling 시야검사계 ( FDT ) 의 Screening 과 N-30 의 비교 |
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김찬윤(Chan Yun Kim),나대로(Dae Rho Na),홍영재(Young Jae Hong) |
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| Abstract |
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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. |
| Key Words:
Frequency doubling perimetry;Glaucoma;N-30;Screening |
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