TY - JOUR
T1 - Threshold equivalence between perimeters
AU - Anderson, Douglas R.
AU - Feuer, William J.
AU - Alward, Wallace L.M.
AU - Skuta, Gregory L.
N1 - Funding Information:
From the Bascom Palmer Eye Institute, Anne Bates Leach Eye Hospital, University of Miami, Department of Ophthalmology, Miami, Florida. This study was supported in part by National Glaucoma Research, a program of the American Health Assistance Foundation, Rockville, Maryland; and by United States Public Health Service National Research Service Award T32 EY 07021 and Core Center Grant P30 EY 02180, each awarded by the National Eye Institute, Bethesda, Maryland.
PY - 1989/5/15
Y1 - 1989/5/15
N2 - To determine equivalence between perimeters, 49 eyes of 35 subjects underwent static threshold testing of the central 30 degrees twice on each of three automated perimeters and twice by manual kinetic threshold testing with the Goldmann perimeter. The Octopus-Humphrey difference was 3.3 dB (2.3 dB in the upper two rows for programs 32 and 30-2). The Dicon-Octopus difference was 3.5 dB and the Dicon-Humphrey, 6.5 dB. The I4e Stimulus of the Goldmann perimeter was equivalent to 17.1 dB, 13.6 dB, and 10.8 dB on the Humphrey, Octopus, and Dicon perimeters, respectively. The III4e Stimulus of the Goldmann perimeter, used for visual impairment determination, was roughly equivalent to 7 to 10 dB, 4 to 7 dB, and 0 to 6 dB on the Humphrey, Octopus, and Dicon perimeters, respectively. The prediction when converting from one instrument to another was only 10% less reliable than the ability of a perimeter to predict the values on a second examination with the same perimeter. Validity of the conversion formulas was confirmed by the age-corrected normal values available for the Octopus, Humphrey, and Goldmann perimeters.
AB - To determine equivalence between perimeters, 49 eyes of 35 subjects underwent static threshold testing of the central 30 degrees twice on each of three automated perimeters and twice by manual kinetic threshold testing with the Goldmann perimeter. The Octopus-Humphrey difference was 3.3 dB (2.3 dB in the upper two rows for programs 32 and 30-2). The Dicon-Octopus difference was 3.5 dB and the Dicon-Humphrey, 6.5 dB. The I4e Stimulus of the Goldmann perimeter was equivalent to 17.1 dB, 13.6 dB, and 10.8 dB on the Humphrey, Octopus, and Dicon perimeters, respectively. The III4e Stimulus of the Goldmann perimeter, used for visual impairment determination, was roughly equivalent to 7 to 10 dB, 4 to 7 dB, and 0 to 6 dB on the Humphrey, Octopus, and Dicon perimeters, respectively. The prediction when converting from one instrument to another was only 10% less reliable than the ability of a perimeter to predict the values on a second examination with the same perimeter. Validity of the conversion formulas was confirmed by the age-corrected normal values available for the Octopus, Humphrey, and Goldmann perimeters.
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U2 - 10.1016/0002-9394(89)90493-5
DO - 10.1016/0002-9394(89)90493-5
M3 - Article
C2 - 2712132
AN - SCOPUS:0024383194
VL - 107
SP - 493
EP - 505
JO - American Journal of Ophthalmology
JF - American Journal of Ophthalmology
SN - 0002-9394
IS - 5
ER -