Efficiency of nistagmus treatment method using videooculography in a long-term observation

The purpose of the study was to investigate the efficiency of nistagmus treatment method using videooculography in a long-term observation. Material and methods. 288 patients were examined. The nystagmogram had been record-ering at the time of the patient''s admission, every day after the treatment and after the entire course of treatment. The video image had been recordering for 1 minute at the sight of the patient directly. Based on the diagnostic results, there had been determining the following parameters: the main nystagmus frequency, the amplitude of the nystagmus (maximum deviation from the central position). The treatment procedure had been carrying out for 7-10 minutes in average, depending on the degree of decrease in the amplitude of the nystagmus. It is necessary to correct the frequency of light stimulus when the main nystagmus frequency changes. Results. Suppression of nystagmus in patients after a single treatment procedure persisted for different times (from several seconds to several minutes), after which the gradual recovery of the nystagmus occurred before the values of the amplitudes less than before the start of the treatment procedure. The result of repeated procedures was a further decrease in nystagmus amplitudes and an increase in the time of preservation of the suppression effect. One course included 7-10 treatment procedures. On average, for 2 courses of treatment per year in 60% of patients the amplitude of nystagmus decreased by 40-85%, in 30% of patients the amplitude of nystagmus did not change more than 8-12%, in 10% of patients there were no significant changes. Conclusion. The developed method using videooculography is effective in the diagnosis and treatment of nystagmus, as it allows to reveal the frequency of nystagmus of each patient with further treatment by light stimulus of the patient at this frequency and the possibility of its correction.