Evaluation of Methods for Automated Hemifield Analysis in Perimetry

Åsman, Peter; Heijl, Anders

doi:10.1001/archopht.1992.01080180092034

Cited by 70 publications

(41 citation statements)

References 20 publications

(7 reference statements)

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…In addition, to evaluate the effect of the severity of the abnormal hemifield on the NFLT of the normal hemifield, the relationship between the TD of the abnormal hemifield and the NFLT of the corresponding normal hemifield was analyzed (Pearson correlation coefficient). In the analysis, because it is shown that not only the visual field threshold but also the NFLT may differ between the upper and lower hemifield in normal human eyes, 13,14 we studied the relationship between TD and NFLT in the eyes with normal upper hemifield and in the eyes with normal lower hemifield, separately.…”

Section: Methodsmentioning

confidence: 99%

Study of Retinal Nerve Fiber Layer Thickness Within Normal Hemivisual Field in Primary Open-Angle Glaucoma and Normal-Tension Glaucoma

Matsumoto

Shirato

Haneda

et al. 2003

Japanese Journal of Ophthalmology

View full text Add to dashboard Cite

Section: Methodsmentioning

confidence: 99%

Study of Retinal Nerve Fiber Layer Thickness Within Normal Hemivisual Field in Primary Open-Angle Glaucoma and Normal-Tension Glaucoma

Matsumoto

Shirato

Haneda

et al. 2003

Japanese Journal of Ophthalmology

View full text Add to dashboard Cite

“…For SWAP, a more feasible option is the calculation of indices as the Glaucoma Hemifield Test [11, 12]and similar indices (e.g. left-right comparison within a field, comparison between eyes of an individual) or to compare the two eyes of a subject, as proposed for standard white-on-white perimetry [13].…”

Section: Discussionmentioning

confidence: 99%

Normal Values of Short-Wavelength Automated Perimetry

Mojon

Zulauf²

2003

Ophthalmologica

View full text Add to dashboard Cite

Background: The purpose of this study was to evaluate short-wavelength automated perimetry (SWAP, i.e., blue-yellow) in normal volunteers and to review the current normal values provided by the manufacturer. Methods: 28 eyes of 28 normal subjects (age range 21–48 years, mean age 36.5 years) had SWAP (Octopus 101, two phases of program G2, Interzeag AG, Schlieren, Switzerland). All subjects had normal eye examinations, refractive errors with spherical equivalents <5 diopters and astigmatism <2 diopters, normal intraocular pressures, no history of diseases affecting the visual field or nerve fiber layer, and normal white-white automated perimetry (Octopus 101, program G2). Results: 21% of the subjects (6/28) had to be excluded since visual field testing was not reliable (reliability factor >5%). With the normal values provided by the manufacturer, only 45% of the remaining subjects (10/22) had all other indices within normal limits. With the appropriate normal values based on the multicenter SWAP Octopus 101 study, 11% (3/28) were beyond the normal range: all had abnormal high sensitivities – 2 due to false-positive response. The normal value range for the index Mean Defect is remarkably wide (5.-, median, 95.- percentile: –4.4, –0.5, +5.3 dB, respectively). The normal value range for the index Loss Variance is surprisingly low and similar to standard perimetry (5.-, median, 95.- percentile: –1.7, 6.8, +21.2 dB², respectively). Conclusion: SWAP with the Octopus G2 program reaches appropriate specificity but only if the correct normal values of the multicenter SWAP Octopus 101 study are used. The variability between subjects is remarkably large. The variability within a visual field is similar for SWAP and standard perimetry as reflected by similar values for the visual field index Loss Variance. Further studies have to establish the sensitivity to detect a disease for SWAP on the Octopus 101.

show abstract

“…Similarly, an abnormal location on the Humphrey was defined by the pattern deviation map on the Statpac program (P < 0.05). Each pattern discrimination field was compared to the patient's automated field by the clusters utilized in the Glaucoma Hemifield Test described by Heijl [5]. We modified this test for our study to account for the reduced number of locations tested on the pattern discrimination perimeter (Fig.…”

Section: %mentioning

confidence: 99%

Correlation of pattern discrimination perimetry to the optic disc and visual field in ocular hypertensive and chronic open-angle glaucoma patients

1995

View full text Add to dashboard Cite

We evaluated 19 ocular hypertensive and 32 chronic open-angle glaucoma patients to determine the correlation of pattern discrimination field loss to known markers of glaucomatous damage on the visual field and the optic nerve head. This study found no statistical association of the findings on the pattern discrimination perimeter to the areas of the optic disc, peripapillary halo, peripapillary atrophy, neural rim, or cup/pallor discrepancy (P > 0.05). In addition, no statistical relationship was observed to the diameters of the largest vein or artery in the inferior- or superior-temporal quadrant adjacent to the optic disc (P > 0.05). Between pattern discrimination and automated perimetry no agreement was observed in any visual field cluster (Glaucoma Hemifield Test) greater than that expected by chance alone (P > 0.05). When both visual function tests disagreed, the proportion of abnormal diagnoses in any cluster did not differ statistically between tests in chronic open-angle glaucoma patients (P > 0.05). However, in ocular hypertensive patients a greater proportion of abnormal diagnoses was observed with pattern discrimination perimetry (P < 0.03). This study suggests that pattern discrimination perimetry appears to measure a different physiologic property of the retina than does automated perimetry.

show abstract

Evaluation of Methods for Automated Hemifield Analysis in Perimetry

Cited by 70 publications

References 20 publications

Study of Retinal Nerve Fiber Layer Thickness Within Normal Hemivisual Field in Primary Open-Angle Glaucoma and Normal-Tension Glaucoma

Study of Retinal Nerve Fiber Layer Thickness Within Normal Hemivisual Field in Primary Open-Angle Glaucoma and Normal-Tension Glaucoma

Normal Values of Short-Wavelength Automated Perimetry

Correlation of pattern discrimination perimetry to the optic disc and visual field in ocular hypertensive and chronic open-angle glaucoma patients

Contact Info

Product

Resources

About