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

The individual data on visual acuity and accommodation range were compared before and after training of accommodation under control of convergence in patients with myopia (N = 33) and hypermetropia (N = 31). The training course consisted of 10 sessions of exercises, during which the patients were instructed to recognize visual stimuli of different sizes, presented at different distances from the eyes. During the session, we gradually changed the strength of corrective lenses under the correct control of convergence of the eye axes on the screen with the visual stimulus. The effect of training was assessed at the three observation distances: 0.5, 1.0 and 5.0 m. The majority of patients with both myopic and hypermetropic refraction had the highest positive effect at the viewing distance of 1 m. However, the individual data differed significantly. The results of the training depended on the initial level of visual acuity, accommodation range, the degree of ametropia and the presence of astigmatism. The most significant improvement of visual acuity was observed in patients with slight degree of ametropia without astigmatism. The improvement of visual acuity was usually combined with the improvement in accommodative ability.

Key words: accommodation, visual acuity, myopia, hypermetropia, convergence, functional correction

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