A good binocular screening device. Performed at a distance of 40 cm with a target of 20/30. Most normal patients can cycle between these prims 15/minute. Those with difficulty should be more thoroughly tested.
12D Base-Out and 3D Base-In.
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A good binocular screening device. Performed at a distance of 40 cm with a target of 20/30. Most normal patients can cycle between these prims 15/minute. Those with difficulty should be more thoroughly tested.
12D Base-Out and 3D Base-In.
A good binocular screening device. Performed at a distance of 40 cm with a target of 20/30. Most normal patients can cycle between these prims 15/minute. Those with difficulty should be more thoroughly tested.
12D Base-Out and 3D Base-In.
| Brands | Bernell USA |
|---|

These vergence prisms quickly screen for binocular vision. Use these to get the patient to cycle between the two prisms up to 15 cycles per minute. Use at 16″ (40 cm) with a 20/30 near point line. Prisms are 12D base-out and 3D base-in and 1.5″ high (38mm).
The Vergence Facility Prism is available in :
Mounted to a stainless steel holder
The small 2″ (5 cm) diameter “smiling face” Fixation paddle was developed based on studies by Robert Fanz. Features include grating on reverse side, small pictures of a bunny and a giraffe for demanding Fixation, and pupil size and corneal diameter measurement on the handle.
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