User's Manual

44 CDC-1 -----------------------------------------------------------------------------------------------------------------------------------
9.10. Worth 4 Dot Test
Title
Content
Purpose
To Check the fusion and suppression
Chart
Aux. Lens
Red/Green
Procedure
① Open the both eyes.
② Place the red filter before the right eye and the green filter before the left eye.
③ Ask the patient how many targets he or she is seeing.
9.11. Polarized Cross Test
Title
Content
Purpose
To measure the lateral and vertical phoria.
Chart
Aux. Lens
Polarized Filter
Procedure
① Open the both eyes.
② Place the polarizing filters before the eyes, 135 degree on the right and 45 degree on
the left.
③ Add prism before the eyes until a patient sees the horizontal and vertical lines aligned.
9.12. Fixation Disparity Test
Title
Content
Purpose
To measure the fixation disparity
Chart
Aux. Lens
Polarized Filter
Procedure
① Open the both eyes.
② Place the polarizing filters before the eyes, 135 degree on the right and 45 degree on
the left.
③ Add prism before the eyes until the patient sees the lines aligned