Sif Dal has tunnel vision, Nystagmus, sensitivity to glare, myopia, and is also long sighted. To assist Sif navigating around obstacles while walking she has Harlem, her guide dog, who wears a harness which connects to a handle that Sif holds. Sif would like to create an adjustable handle for her dog guide harness so that she can easily alter its length. She would also like her harness to incorporate technological features in order to make navigation easier.