EN
French
- Comes with a single 6 PD stick prism.
- This card allow direct measurement of the distance phoria in real space or with a phorpter. The patient simple has to tell which number the arrow points to. Any odd number (in yellow) shows esophoria while the even numbers (in blue) shows exophoria. An AC/A can quickly be determined with trial lenses.
- Distance chart is about 24" wide.
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