Monitor, a Vibrotactile Aid for Environmental Perception: A Field Evaluation by Four People with Severe Hearing and Vision Impairment

Table 1

Anamnestic information of the four female participants with Usher’s Syndrome I (P1, P2, P3, and P4).

Participant	P1	P2	P3	P4
Age	50	44	51	54
Visual Acuity (right eye)	Light perception (yr 2009)	0.1 cc (yr 2011)	0.3 cc (yr 2013)	0.16 cc (yr 2011)
Visual Acuity (left eye)	Light perception (yr 2009)	0.09 cc (yr 2011)	0.4 cc (yr 2012)	0.16 cc (yr 2011)
Visual field, right eye (Goldman, V/4 obj.)	<2°(yr 2009)	5° (yr 2011)	<10° (yr 2012)	10° (yr 2011)
Visual field, left eye (Goldman, V/4 obj.)	<5° (yr 2009)	5° (yr 2011)	<10° (yr 2012)	10° (yr 2011)
Age of subjective notified visual impairment	About eight	Teens	Teens	Teens
Hearing	Born deaf	Born deaf	Born deaf (used hearing aid)	Born deaf
Ways of communication	Tactile sign language, E-mail, and SMS and, braille	Visual and Tactile sign language, E-mail, SMS, reading, and writing	Visual sign language, E-mail SMS, reading, and writing,	Visual sign language, E-mail SMS, reading, and writing,