Biofeedback in Idiopathic Infantile Nystagmus Syndrome

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.