Filter-free method for assessing farpoint stereopsis: a pilot study report

The purpose of this study was to investigate the feasibility of designing a simple, filter-free ("real-depth" conditions) farpoint stereotest. A two-step pilot study is described wherein (Step 1) an enlarged, somewhat modified version of the standard version of the Frisby stereotest was constructed and administered to 42 adult subjects. This was followed (Step 2) by the construction and try-out of a similar apparatus that was based on the same principles, but comprised different stimuli. Descriptions of both tests are provided along with data which suggest that designing such a test for clinical application is feasible.