What type of screening is used for phoria in a ten-year-old with a visual acuity test of 20/30?

The correct choice involves utilizing a binocular approach for screening phoria in a ten-year-old with a visual acuity of 20/30. This method is appropriate because phoria refers to a latent deviation of the eyes that occurs when binocular vision is disrupted.

When evaluating phoria, it is crucial to assess how both eyes work together (binocular vision) rather than just focusing on each eye individually (monocular vision). Using binocular techniques allows the practitioner to observe how the eyes maintain alignment when both are open, which is essential in detecting any deviations that might not be apparent when each eye is examined separately.

In this context, the range of visual acuity (20/30) does not directly influence the screening method for phoria; the binocular assessment remains the preferred method to determine how the eyes function together, making it the correct approach in this scenario. Monocular methods would not provide the necessary insight into the interaction between the eyes that is critical for diagnosing phoric conditions.