Comfort makes that conforms to the shape of the face. Additionally the video can be taped plus the nystagmus which have examined can be filled.It can be directly connection to the video input of all the monitors and T.V sets provided using a scart plug this makes it functional and practical, this also improves home exams and those at the hospitals. The unit is lightweight reliable and handy. The nystagmoscope (goggle), fits out out having a stable infrared video camera plus high resolution, this gives the faithful image excellent quality. The camera can be moved from one eye to the next quite easily.