Volume 30 #1

Contents

1. Protanomaly: Possibilities for compensation and color discrimination training
2. Visual acuity dependence on refraction: diversity ambiguity of impact
3. Effects of temporal and spatial features of visual stimulation on saccades in normal controls and parkinsonian patients
4. Individual data on visual acuity and accommodation after training of accommodation under control of convergence in patients with myopia and hypermetropia
5. Eye movement parameters are influenced by cognitive task in viewing of static and dynamic scenes
6. Acoustic brainstem evoked potentials as the evaluation tool for the functional state of the central nervous system in children with disseminated encephalomyelitis
7. Frequency organization of the auditory receptor complex in midges (Chironomidae, Diptera)
8. Multisensory information processing in visual, auditory and gustatory sensory systems with involvement of infraslow brain potential oscillations

We conducted a comparative study of eye movement parameters in humans while viewing static and dynamic scenes in different conditions – free viewing and visual cognitive task. The patterns of visual activity considerably influence the eye movement parameters: in cognitive task performance fixation durations were shorter and saccadic amplitudes were larger when viewing both static and dynamic scenes. Longer fixation durations and larger saccadic amplitudes are observed in viewing dynamic scenes compared to viewing static scenes. Fixation durations vary considerably depending on the task while viewing dynamic scenes and almost do not depend on the task when viewing static scenes. Only the type of the visual scene (static and dynamic) but not the kind of visual activity (free viewing and task performance) determines saccadic amplitudes. The dynamics of eye movement parameters revealed in our study are determined by the balance of two visual modes (ambient and focal) with different types of visual activity.

Key words: eye movements, visual modes, static visual scene, dynamic visual scene, visual task, attention, saccades, fixations

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