A New Computerized Cyclotorsion Test

ABSTRACT

Cyclotorsion is a well known feature of oblique muscle disorders in the eye, usually associated with vertical and/or horizontal strabismus. Its presence and amount of deviation are not easy to detect, therefore requiring more sensitive and accurate tests. But the present measuring devices such as the double Maddox rod test and Bagolini lens test, known to be the standard tests used for cyclodeviation in these days have some limitations. We developed a new computerized test for the measurement of cyclodeviation that remedies the weak points of the existing tests. The cyclotorsion at any eye position can be measured accurately. It is based on subjective response of the examinee. The examinee wears the red-green glasses and identifies when the two lines on the monitor are parellel while the examiner rotates the red or green line with keystroke of computer keyboard. It is possible to test the deviations in all directions. We hope this computerized application will be accepted widely as an useful subjective torsion test in near future.