The fusion tests are particularly significant in screening for suppression and potential amblyopia. The acuity tests check the eyes individually while both are open and seeing. The child sits or stands in front of the Telebinocular instrument. He looks into the instrument to view the series of stereoscopic test target slides. The examiner explains each target and the child reports what he sees.
Testing is rapid and, normally, enjoyable.
The complete test battery can usually be given in less than four minutes. Far point tests are presented first. The target holder is then moved to the near point position for the balance of the test program. In some cases, as with suppression, an occluding device may be used. Test administration does not require clinically-trained personnel.