iPhone app Worth 4 Dot

Designed for eye care professionals and students.
Use at own discretion.

Use in place of Worth 4-Dot flashlight to assess for fusion, suppression and anomalous retinal correspondance.

Test with red-green anaglyphic glasses over best optical correction (red filter over right eye and green over left).

Patient should see one of the following:

* Two red dots: supression of left eye

* Three green dots: supression of right eye

* Four dots: normal binocular response

* Five dots:

a) Red dots on right

Uncrossed diplopia (esotropia)

b) Red dots on left

Crossed diplopia (exotropia),

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