Abstract

Threshold luminance was determined at various eccentricities along the horizontal nasal meridian of the dark-adapted retina of one subject. If test-flash duration is brief, threshold is almost independent of eccentricity, in the range investigated. If the duration exceeds, say, 12 ms, sensitivity deteriorates beyond 40°. Luminance–time relationships reveal that the total integration time decreases as the distance from the fovea is increased beyond 40°. This, however, is no longer the case when oblique-ray astigmatism is suitably corrected; total integration time attains an unexpected value (1 s) and sensitivity, as determined with long-duration flashes, increases as eccentricity is increased. The relation between size of the minimal-blur disk and size of receptive field is discussed.

© 1971 Optical Society of America

Full Article  |  PDF Article
OSA Recommended Articles
Luminance–Time Relation at Various Eccentricities: Individual Differences*

Lucia Ronchi and Olga Nováková
J. Opt. Soc. Am. 61(1) 115-118 (1971)

Time resolution at extremely low scotopic luminances

Lucia Ronchi and Giuseppe Molesini
J. Opt. Soc. Am. 64(6) 887-889 (1974)

Spatial and temporal summation in the human dark-adapted retina

P. Zuidema, H. Verschuure, M. A. Bouman, and J. J. Koenderink
J. Opt. Soc. Am. 71(12) 1472-1480 (1981)

References

You do not have subscription access to this journal. Citation lists with outbound citation links are available to subscribers only. You may subscribe either as an OSA member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Login to access OSA Member Subscription

Cited By

You do not have subscription access to this journal. Cited by links are available to subscribers only. You may subscribe either as an OSA member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Login to access OSA Member Subscription

Figures (7)

You do not have subscription access to this journal. Figure files are available to subscribers only. You may subscribe either as an OSA member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Login to access OSA Member Subscription