The broad objective is to find out what the fast and slow oculomotor subsystems can do to relate such oculomotor capacity to the perception of a clear and stable world. Eye movements and contrast sensitivity of human subjects will be measured when their heads are stabilized with a SRI Double Purkinje Image tracker and also with a novel renolving magnetic field sensor coil monitor that permits ninocular eye, head and torso rotations to be measured accurately when the subject is free to move naturally within a one meter sphere. A subject with abnormally high retinal image motion accompanying congenital nystagmus and old and new world monkeys will be studied as well as normal human beings. Longitudinal studies of preschool and 10-year old children will be continued. The proposed research is significant because it will bring oculomotor and visual research, both done primarily under artificial laboratory conditions, into a naturL situation in which ordinary bodily activities are permitted while visual function and oculomotor compensation are measured. This is a new direction of research provoked by our recent findings that oculomotor compensation, in itself, cannot explain how we see a clear and stable world. The research will be collaborative, involving scientists (viz. Collewijn, Dell'Osso, Kowler, J. Z. Levinson and Skavenski) with expertise in several complementary areas.
| Dell'Osso, L F; van der Steen, J; Steinman, R M et al. (1992) Foveation dynamics in congenital nystagmus. I: Fixation. Doc Ophthalmol 79:1-23 |
| Dell'Osso, L F; van der Steen, J; Steinman, R M et al. (1992) Foveation dynamics in congenital nystagmus. II: Smooth pursuit. Doc Ophthalmol 79:25-49 |
| Dell'Osso, L F; van der Steen, J; Steinman, R M et al. (1992) Foveation dynamics in congenital nystagmus. III: Vestibulo-ocular reflex. Doc Ophthalmol 79:51-70 |
| Steinman, R M; Levinson, J Z (1990) The role of eye movement in the detection of contrast and spatial detail. Rev Oculomot Res 4:115-212 |
| Steinman, R M; Kowler, E; Collewijn, H (1990) New directions for oculomotor research. Vision Res 30:1845-64 |
| Erkelens, C J; Van der Steen, J; Steinman, R M et al. (1989) Ocular vergence under natural conditions. I. Continuous changes of target distance along the median plane. Proc R Soc Lond B Biol Sci 236:417-40 |
| Erkelens, C J; Steinman, R M; Collewijn, H (1989) Ocular vergence under natural conditions. II. Gaze shifts between real targets differing in distance and direction. Proc R Soc Lond B Biol Sci 236:441-65 |
| Erkelens, C J; Collewijn, H; Steinman, R M (1989) Asymmetrical adaptation of human saccades to anisometropic spectacles. Invest Ophthalmol Vis Sci 30:1132-45 |
| Collewijn, H; Erkelens, C J; Steinman, R M (1988) Binocular co-ordination of human vertical saccadic eye movements. J Physiol 404:183-97 |
| Collewijn, H; Erkelens, C J; Steinman, R M (1988) Binocular co-ordination of human horizontal saccadic eye movements. J Physiol 404:157-82 |
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