Relating to touch, being more dependent on tactile than visual sensory input.
Visually handicapped pupils can certainly be trained to use their other senses very effectively in listening, tactile, and haptic skills.
J.M. Stone, The Visually Handicapped Child in Your Classroom (Special Needs in Ordinary Schools). Amazon
To start a haptic communication you need to be within "arm's reach", which is more than just an idiomatic expression, but defines a special spatial relationship. You touch to experience, to acquire knowledge, but when another is involved you also touch to communicate. Without thinking you transfer information. We even use the phrase "keep in touch" as a metaphor for speaking in the near future.