Chiroscope
A chiroscope , also called chiroskop , (from ancient Greek χείρ cheir , hand 'and from ancient Greek σκοπεῖν skopein , to look at') is a simple orthoptic exercise device with which sensory and motor binocular training (simultaneous viewing, fusion, stereopsis ) can be carried out. It is equipped with a drawing pad and display instrument, the display instrument being set up as a haploscope with which a left and / or right image is displayed over the drawing. It can also be used in the rehabilitation of neurologically-related visual disturbances and visual impairment .
The British ophthalmologist Ernest E. Maddox writes in an article from 1929 that compared to the earlier amblyoscope
- "the chiroscope approaches the problem from a different and complementary point of view, based on the simple principle of putting the hand in service to educate the eye."
The principles of hand-eye coordination are therefore also the basis . A chiroscope can be operated in different ways. For example, using a chiroscope, a line image can be presented to one eye and a blank sheet image to the other eye and the subject is asked to make a drawing that reproduces the line image.
The chiroscope is used for diagnostic and therapeutic purposes to test binocular vision in order to assess heterophorias , in particular with regard to binocular stability and the presence and extent of inhibition mechanisms ( suppression ). It can also be used in low-vision therapy to train amblyopic subjects in hand-eye coordination. A stereoscope can be modified to function as a chiroscope.
Individual evidence
- ^ WD Schäfer: Strabismus in the practice: examination technique and treatment process . Springer-Verlag, 2013. ISBN 9783642664137
- ↑ Georg Kerkhoff, Elisabeth Stögerer: Treatment of fusion disorders in patients after brain damage , from Thieme - Clinical Monthly Ophthalmology 1994; 205 (8): 70-75. DOI: 10.1055 / s-2008-1045495
