User's Manual

--------------------------------------------------------------------------------------------------------------------- CDC-1 User Manual
45
9.13. Coincidence Test
Title
Content
Purpose
To check the aniseikonia and measure the lateral and vertical phoria
Chart
Aux. Lens
Polar
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 Check the coincidence of right and left bracket
9.14. Schober test
Title
Content
Purpose
To measure the lateral and vertical phoria
Chart
Aux. Lens
Red/Green
Procedure
① Open the both eyes.
② Place the red filter on the right and green filter on the left.
③ Add prism before eyes until the patient sees the cross in the center of the circles
9.15. Von Graefe Test
Title
Content
Purpose
To measure the phoria
Chart
Aux. Lens
6 BU split prism before right eye
10 BI split prism before left eye
Procedure
① Open the both eyes
② Place the proper prism before eye.
③ Add prism before eyes until the patient sees the two bars aligned