Abstract
Effects of target size, eccentricity and background luminance were determined for static and acuity profile perimetry in the central 30° radius of the visual field. Reductions in target size produced decreases in sensitivity for both functions, with acuity profiles (resolution sensitivity) being more affected than static profiles (detection sensitivity). At photopic background luminances, detection sensitivity was greatest at the fovea and progressively declined with increasing eccentricity; lower background luminances produced greater detection sensitivity for the near periphery than for the fovea. Resolution sensitivity for small targets (20/80 or less) exhibited a rapid decline with increasing eccentricity that was relatively independent of background luminance, whereas large targets (20/125 or greater) revealed findings similar to the detection sensitivity results. The relative contributions of rods and cones to threshold visual responses thus appear to depend on the type of visual task, target size, eccentricity, background luminance and thek interactions. These data provide a comparison basis for future evaluations of patients with photoreceptor dysfunction.
| Original language | English (US) |
|---|---|
| Pages (from-to) | 371-388 |
| Number of pages | 18 |
| Journal | Documenta Ophthalmologica |
| Volume | 50 |
| Issue number | 2 |
| DOIs | |
| State | Published - Mar 1981 |
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Keywords
- Acuity profile perimetry
- Mesopic
- Photopic
- Scotopic adaptation
- Static perimetry
ASJC Scopus subject areas
- Ophthalmology
Cite this
Static and acuity profile perimetry at various adaptation levels. / Johnson, C. A.; Keltner, J. L.; Balestrery, F. G.
In: Documenta Ophthalmologica, Vol. 50, No. 2, 03.1981, p. 371-388.Research output: Contribution to journal › Article
}
TY - JOUR
T1 - Static and acuity profile perimetry at various adaptation levels
AU - Johnson, C. A.
AU - Keltner, J. L.
AU - Balestrery, F. G.
PY - 1981/3
Y1 - 1981/3
N2 - Effects of target size, eccentricity and background luminance were determined for static and acuity profile perimetry in the central 30° radius of the visual field. Reductions in target size produced decreases in sensitivity for both functions, with acuity profiles (resolution sensitivity) being more affected than static profiles (detection sensitivity). At photopic background luminances, detection sensitivity was greatest at the fovea and progressively declined with increasing eccentricity; lower background luminances produced greater detection sensitivity for the near periphery than for the fovea. Resolution sensitivity for small targets (20/80 or less) exhibited a rapid decline with increasing eccentricity that was relatively independent of background luminance, whereas large targets (20/125 or greater) revealed findings similar to the detection sensitivity results. The relative contributions of rods and cones to threshold visual responses thus appear to depend on the type of visual task, target size, eccentricity, background luminance and thek interactions. These data provide a comparison basis for future evaluations of patients with photoreceptor dysfunction.
AB - Effects of target size, eccentricity and background luminance were determined for static and acuity profile perimetry in the central 30° radius of the visual field. Reductions in target size produced decreases in sensitivity for both functions, with acuity profiles (resolution sensitivity) being more affected than static profiles (detection sensitivity). At photopic background luminances, detection sensitivity was greatest at the fovea and progressively declined with increasing eccentricity; lower background luminances produced greater detection sensitivity for the near periphery than for the fovea. Resolution sensitivity for small targets (20/80 or less) exhibited a rapid decline with increasing eccentricity that was relatively independent of background luminance, whereas large targets (20/125 or greater) revealed findings similar to the detection sensitivity results. The relative contributions of rods and cones to threshold visual responses thus appear to depend on the type of visual task, target size, eccentricity, background luminance and thek interactions. These data provide a comparison basis for future evaluations of patients with photoreceptor dysfunction.
KW - Acuity profile perimetry
KW - Mesopic
KW - Photopic
KW - Scotopic adaptation
KW - Static perimetry
UR - http://www.scopus.com/inward/record.url?scp=0019414952&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=0019414952&partnerID=8YFLogxK
U2 - 10.1007/BF00158022
DO - 10.1007/BF00158022
M3 - Article
C2 - 7227177
AN - SCOPUS:0019414952
VL - 50
SP - 371
EP - 388
JO - Documenta Ophthalmologica
JF - Documenta Ophthalmologica
SN - 0012-4486
IS - 2
ER -