DECREMENT OF VISUAL ACUITY RESULTING FROM TWO TYPES OF VISUAL DETECTION TASK

KEN SHIINA; ROBERT B. JR. FREEMAN

doi:10.4992/psycholres1954.20.155

KEN SHIINA, ROBERT B. JR. FREEMAN

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JOURNAL FREE ACCESS

1978 Volume 20 Issue 4 Pages 155-158

DOI https://doi.org/10.4992/psycholres1954.20.155

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Published: March 30, 1979 Received: June 27, 1978 Available on J-STAGE: February 24, 2009 Accepted: - Advance online publication: - Revised: -
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Date of correction: February 24, 2009 Reason for correction: - Correction: AUTHOR Details: Wrong : KEN SHIINA¹⁾, ROBERT B. FREEMAN, JR.²⁾
Right : KEN SHIINA¹⁾, ROBERT B. JR. FREEMAN²⁾

Date of correction: February 24, 2009 Reason for correction: - Correction: CITATION Details: Wrong : CLEMMESEN, V. 1944 Central and indirect vision of the light-adapted eye. Acta Physiologica Scandinaoica, 9, Supplement 27.
DAITH, J. M., & GREEN, D. G. 1969 Contrast sensitivity of the human peripheral retina. Vision Research, 9, 947-952.
HOLM, E. 1923 Central and eccentric vision. Acta Ophthalmologica, 1, 49.
LE GRAND, Y. 1967 Form and space vision. (Trs. by M. Millodot & G.G. Heath) Bloomington, Ind.: Indiana U. Press.
RIPPs, H., & WEALE, R. A. 1976 Contrast and border phenomena: Visual resolution. In H. Davson (Ed.), The eye. Vol. 2a. New York: Academic Press. Pp. 131-184.

Right : CLEMMESEN, V. 1944 Central and indirect vision of the light-adapted eye. Acta Physiologica Scandinavica, 9, Supplement 27.
DAITH, J. M., & GREEN, D. G. 1969 Contrast sensitivity of the human peripheral retina. Vision Research, 9, 947-952.
HOLM, E. 1923 Central and eccentric vision. Acta Ophthalmologica, 1, 49.
LE GRAND, Y. 1967 Form and space vision.(Trs. by M. Millodot & G. G. Heath) Bloomington, Ind.: Indiana U. Press.
RIPPS, H., & WEALE, R. A. 1976 Contrast and border phenomena: Visual resolution. In H. Dayson (Ed.), The eye. Vol.2a. New York: Academic Press. Pp.131-184.

Date of correction: February 24, 2009 Reason for correction: - Correction: PDF FILE Details: -

Date of correction: February 24, 2009 Reason for correction: - Correction: CITATION Details: Wrong : CLEMMESEN, V. 1944 Central and indirect vision of the light-adapted eye. Acta Physiologica Scandinavica, 9, Supplement 27.
DAITH, J. M., & GREEN, D. G. 1969 Contrast sensitivity of the human peripheral retina. Vision Research, 9, 947-952.
HOLM, E. 1923 Central and eccentric vision. Acta Ophthalmologica, 1, 49.
LE GRAND, Y. 1967 Form and space vision.(Trs. by M. Millodot & G. G. Heath) Bloomington, Ind.: Indiana U. Press.
RIPPS, H., & WEALE, R. A. 1976 Contrast and border phenomena: Visual resolution. In H. Dayson (Ed.), The eye. Vol.2a. New York: Academic Press. Pp.131-184.

Right : CLEMMESEN, V. 1944 Central and indirect vision of the light-adapted eye. Acta Physiologica Scandinavica, 9, Supplement 27.
DAITH, J. M., & GREEN, D. G. 1969 Contrast sensitivity of the human peripheral retina. Vision Research, 9, 947-952.
HOLM, E. 1923 Central and eccentric vision. Acta Ophthalmologica, 1, 49.
LE GRAND, Y. 1967 Form and space vision.(Trs. by M. Millodot & G. G. Heath) Bloomington, Ind.: Indiana U. Press.
RIPPS, H., & WEALE, R. A. 1976 Contrast and border phenomena: Visual resolution. In H. Davson (Ed.), The eye. Vol.2a. New York: Academic Press. Pp.131-184.

Abstract

Parafoveal visual acuity (a modified Landolt ring) was reduced by a simultaneous foveal detection task. Two types of foveal tasks were used: Landolt ring and upper-case letter. The foveal letter target reduced acuity of the parafoveal ring by a greater amount than did the foveal Landolt ring.

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