Central field perimetry of discriminated targets: I. Results for normal individuals using high-contrast targets

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dc.contributor.authorYavuz, Gülderen Aktan
dc.contributor.authorÜnver, Y.B.
dc.contributor.authorBekiroğlu, N.
dc.contributor.authorPresti, Peter
dc.contributor.authorSinclair, Stephen H.
dc.date.accessioned2020-04-30T22:40:35Z
dc.date.available2020-04-30T22:40:35Z
dc.date.issued2009
dc.departmentDÜ, Tıp Fakültesi, Cerrahi Tıp Bilimleri Bölümüen_US
dc.descriptionWOS: 000271672600011en_US
dc.descriptionPubMed: 19648898en_US
dc.description.abstractPurpose A new perimetry method is described to evaluate central vision under multiple hue, illumination, and contrast conditions; results are described for normal individuals using high-contrast targets. Methods For 70 normal eyes of individuals with varying age, the ETDRS chart acuity was determined as well as discriminated target perimetry using high-contrast targets presented for 250 ms at locations up to 10 degrees eccentricity. Retesting was performed to evaluate for learning and repeatability for the thresholded acuity at each eccentricity. Results The ETDRS acuity averaged 1.15 +/- 0.37 arc min minimum angle of resolution (MAR) with best correction (20/23 equivalence). At fixation, the thresholded acuity for high-contrast targets paralleled the ETDRS acuity and averaged 1.75 +/- 0.85 arc min MAR (20/35 equivalence), and declined with increasing eccentricity in a linear fashion to 5.81 +/- 3.97 arc min (20/116 equivalent) at 10 degrees eccentricity. Linear regression showed Vmar = 1.74 vertical bar 0.330 * eccentricity in degrees (R-2 = 0.966, P < 0.0001). Testing time required similar to 8-10 min per eye. Repeated testing showed only minimal learning experience at the most peripheral locations. The test-retest 95% confidence limits of difference measured 1.12 arc mins MAR at fixation (64% of the mean) and remained approximately the same proportion to the mean thresholded acuity outwards to 10 degrees eccentricity. Conclusion The methodology seems rapid and reliable for measuring discriminatory visual function of optotype targets throughout the central 20 degrees diameter visual field. Eye (2009) 23, 2082-2089; doi:10.1038/eye.2009.177; published online 17 July 2009en_US
dc.identifier.doi10.1038/eye.2009.177en_US
dc.identifier.endpage2089en_US
dc.identifier.issn0950-222X
dc.identifier.issn1476-5454
dc.identifier.issue11en_US
dc.identifier.scopusqualityQ1en_US
dc.identifier.startpage2082en_US
dc.identifier.urihttps://doi.org/10.1038/eye.2009.177
dc.identifier.urihttps://hdl.handle.net/20.500.12684/3015
dc.identifier.volume23en_US
dc.identifier.wosWOS:000271672600011en_US
dc.identifier.wosqualityQ2en_US
dc.indekslendigikaynakWeb of Scienceen_US
dc.indekslendigikaynakPubMeden_US
dc.indekslendigikaynakScopusen_US
dc.language.isoenen_US
dc.publisherNature Publishing Groupen_US
dc.relation.ispartofEyeen_US
dc.relation.publicationcategoryMakale - Uluslararası Hakemli Dergi - Kurum Öğretim Elemanıen_US
dc.rightsinfo:eu-repo/semantics/openAccessen_US
dc.subjectdiscriminated targeten_US
dc.subjectperimetryen_US
dc.subjectvisual acuityen_US
dc.subjectvisual fielden_US
dc.subjectresolutionen_US
dc.subjectLandolt Cen_US
dc.titleCentral field perimetry of discriminated targets: I. Results for normal individuals using high-contrast targetsen_US
dc.typeArticleen_US

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