Science Links Japan | Comparison of Detectability of Visual Field Abnormality by Frequency Doubling Technology in Primary Open-angle Glaucoma and Normal-tension Glaucoma.

Comparison of Detectability of Visual Field Abnormality by Frequency Doubling Technology in Primary Open-angle Glaucoma and Normal-tension Glaucoma.

Accession number;01A0457961

Title;Comparison of Detectability of Visual Field Abnormality by Frequency Doubling Technology in Primary Open-angle Glaucoma and Normal-tension Glaucoma.

Author; HORIKOSHI NORIKO (Tokyoidai Kasumigaurabyoin Ganka) OSAKO MASAHIRO (Tokyoidai Kasumigaurabyoin Ganka) TAMURA YOKO (Tokyoidai Kasumigaurabyoin Ganka) OKANO TADASHI (Tokyoidai Kasumigaurabyoin Ganka) USUI MASAHIKO (Tokyoidai Gankagakukyoshitsu)

Journal Title;Journal of Japanese Ophthalmological Society

Journal Code:Z0666A

ISSN:0029-0203

VOL.105;NO.4;PAGE.244-250(2001)

Figure&Table&Reference;FIG.5, TBL.3, REF.34

Pub. Country;Japan

Language;Japanese

Abstract;Purpose: To compare the effectiveness of frequency doubling technology (FDT) in detecting abnormalities in primary open-angle glaucoma (POAG) and normal-tension glaucoma (NTG). Subjects and Methods: Twenty-nine POAG patients (29 eyes) and 27 NTG patients (27 eyes) were studied. All subjects underwent testing with program C-20 of FDT with appropriate corrective lenses. Results: No significant differences were observed between the two groups in mean age, mean deviation (MD), and pattern standard deviation (PSD) measured by the Humphrey Field Analyzer (HFA). The correlation between MD values determined by HFA(x) and FDT(y) is represented by y=0.60x-2.7(r=0.78, p<0.01) in the POAG group and y=0.59x+0.6(r=0.81, p<0.001) in the NTG group. No significant difference was found in the average PSD between the two groups. In early glaucoma cases (MD.GEQ.-5dB by HFA), a larger proportion of cases in the POAG group than the NTG group had a lower significance level of MD determined by FDT than by HFA (p<0.02). At many test points on the temporal periphery in FDT the mean sensitivity was lower in the POAG group than in the NTG group; whereas no significant differences among HFA test points were observed. Conclusions: FDT detected visual field abnormalities in POAG cases more sensitively than in NTG cases. This finding indicates that the pathogenesis of My-cell damage is different in POAG and NTG. (author abst.)

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