Biofeedback in Idiopathic Infantile Nystagmus Syndrome
Monica Daibert Nido
34 participants
Jan 30, 2019
INTERVENTIONAL
Conditions
Summary
Active eye movement control training, an old and still most prevalent intervention in low vision rehabilitation (LVR) was never used in nystagmus clinically. Biofeedback training (BT) is the latest and newest technique for oculomotor control training in cases with low vision when using available modules in the new microperimetry instruments. Laboratory studies in the literature highlighted positive benefits from using BT in nystagmus cases. The purpose of this study is to assess systematically the impact of BT in a series of cases with Infantile Idiopathic Nystagmus (IIN) and formulate guidelines for further use of this intervention in nystagmus cases in general.
Eligibility
Inclusion Criteria2
- Diagnosed as Infantile idiopathic nystagmus (IIN)
- Ability to follow the visual and auditory stimuli and training instructions
Exclusion Criteria5
- Ocular diseases not related to the nystagmus physiopathology
- Both eyes with media opacity that impairs microperimetry testing
- Peripheral nystagmus cases
- Other types of nystagmus than IIN
- Inability to perform during testing and training
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Interventions
Microperimeter biofeedback training as described provides to the patient a variable frequency sound and a luminous stimulus that vary according to the eyes position, thus guides the oculomotor control and fixation stability accordingly.
The simulated biofeedback training for Group B involves the following: each session includes presentation of a C10-2 microperimetry program. The procedure involves presentation of a standard LED fixation target (FT) consisting of a small red circle of about 0.76° diameter. Initially the participant will be instructed to stare at the FT circle. Following this stage the participant will be guided to look at the FT and simultaneously to be aware of any flashing lights in the periphery of vision. As performing this task, the participant will actively control the eye movements and similar to computer games, the patient has to identify targets in the peripheral field of vision and respond by pressing a button.
Locations(1)
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NCT04142307