Abstract

This paper reports an extended study of anomalous (enhanced) sensitivity to moving gratings in the range of 1–10 cycles per degree, at high temporal frequencies (>20 Hz), i.e., in the high-frequency corner of the spatiotemporal threshold surface. The effect is very robust. All subjects (n = 5) show the effect with moving or flickering gratings and with or without stabilization of the retinal image. After eliminating various types of potential artifacts, the phenomenon was finally attributed to a form of transient destabilization associated with microsaccadic eye movements. In the unstabilized condition, microsaccades and voluntary saccades both interact with the grating motion to produce visible flashes. With image stabilization, the (1-msec) delay of the Purkinje-image eyetracker interacts with these saccades in a way that increases the visibility of the associated flashes. The form of the threshold data suggests that the size of the saccades may vary with the spatial period of the moving grating.

© 1990 Optical Society of America

Full Article  |  PDF Article
OSA Recommended Articles
Motion and vision. I. Stabilized images of stationary gratings

D. H. Kelly
J. Opt. Soc. Am. 69(9) 1266-1274 (1979)

Motion and vision. III. Stabilized pattern adaptation

D. H. Kelly and Christina A. Burbeck
J. Opt. Soc. Am. 70(11) 1283-1289 (1980)

Motion and vision. IV. Isotropic and anisotropic spatial responses

D. H. Kelly
J. Opt. Soc. Am. 72(4) 432-439 (1982)

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 (15)

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

Equations (5)

You do not have subscription access to this journal. Equations 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

Metrics

You do not have subscription access to this journal. Article level metrics 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