DEVELOPMENT AND EVALUATION OF MOTORIZED AND AUTOFOCUS LOW VISION TELESCOPES

Title DEVELOPMENT AND EVALUATION OF MOTORIZED AND AUTOFOCUS LOW VISION TELESCOPES
Author, Co-Author Thomas Kuyk, Jerome James
Topic
Year
1992
Day
Monday
Program Number
Poster 44
Room
Great Hall
Affiliation
Abstract Miniature telescopes are commonly used as low vision aids, but they present focus control problems for some users. Motorizing focus might alleviate some of these problems. Two years ago we reported some degree of success with simple motorized telescopes in a comparison test with hand focus telescopes. The present study reports results of a similar comparison, but with a second group of prototype motorized telescopes of a different design, and an autofocusing, variable magnification camera lens converted to a telescope. Twenty-four low vision subjects (all experienced users of hand focus miniature telescopes) were given 60-90 minutes practice with the different telescopes and then completed two tracking tasks using a hand focus telescope, a motorized prototype, and/or the autofocusing prototype. Subjects also rated various design and performance features of each device. Performance with the motorized device equalled that with the hand focus telescope, while the autofocus device proved superior to both. In three way comparisons, the order of device preference was autofocus, motorized, and hand focus. Other results as well as how the devices were developed and problems associated with them will be discussed. Supported by VA Rehabilitation Research and Development grant C557-DA.
Affiliation of Co-Authors
Outline