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Mecislovas Vrubliauskas, Igor Rabichev; Research and Training of Stereovision with Integral Feedback. Invest. Ophthalmol. Vis. Sci. 2015;56(7 ):4302.
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© ARVO (1962-2015); The Authors (2016-present)
Sensorimotor models of visual perception are distinguished for their effectiveness in evaluation and training of stereovision, but they lack integrity, feedback and accuracy.<br /> This study researches an integral model and method of stereovision with a feedback which increase the accuracy and effectiveness of measurement, inducing and training of stereovision.
Method and software may test, induce and train the stereovision for people with healthy and disordered binocular vision. It consists of a personal computer, optic system and VISUS-4D software. Basic and test - static or dynamic stereo objects are projected on a monitor screen. A basic stereo object is operated by the software and a test object - manually by a tested individual. The scheme of the model is presented in the image. The results of disparity between test and basic objects - stereo-acuity are recorded and presented in tables and diagrams.<br /> Given the lack of stereovision it is induced and trained with special exercises. The movements “forward - backward” are trained and the references where a test object must be located may be provided. Significant role is played by two factors: sight shifting from the closer object to the more distant one and its coordination with hand movements.<br /> In trainings with the disparity of 6-15 arcminutes (6'-15') the stereoscopic view corresponding the movement of hand and eyes is gradually accumulated and formed. Trainings increase the stereo-acuity. By seeing his/her results and receiving references a trainee corrects the movements of his hand and eyes gradually increasing his/her stereo-acuity.
More than 50 individuals passed the tests, 15 of those were instructed and received the stereovision training.<br /> Static stereo-acuity of 35 individuals was up to 2' and dynamic stereo-acuity was about 4'-6'. They had no complaint of stereo-acuity and those values may be considered as sufficient. Out of 15 individuals who had no stereovision only one of them failed to induce it by training in a few months.<br /> Tests may be used for the evaluation of acuity of stereovision and stereo-activity of individuals of different occupations, drivers and surgeons inclusive.
Evaluation and training of characteristics of stereovision by using an integral model with feedback confirm its high integrity, precision and effectiveness.
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