Three binocularity evaluation methods
Goodlaw, E.
Journal of the American Optometric Association 53(9): 707-711
1982
ISSN/ISBN: 0003-0244 PMID: 7130610 Document Number: 185641
Determining effort expended in binocular seeing is usually accomplished by equating dissociated phoria with total vergence ability. Fixation disparity testing by disclosing failure of precise binocular alignment is a second method which helps to assess both direction and quantity of prism power needed to accomplish alignment. Neither of these two methods delineates the foveal role as a sensory fusional lock in binocularity. The third is the Goodlaw test in which the exact focus of the eyes is disturbed through plus and/or minus lenses, provides this information and further directs therapy.