Illinois Vision Certification Practice Test

In the Phoria far test, when does a child fail the initial screening?

1. If the ball is inside the box

2. If the ball is out of the A box

3. If the ball touches the boundaries

4. If the ball is out of the B box

The correct answer is: If the ball is out of the B box

In the Phoria far test, the purpose is to assess a child's ability to maintain proper alignment of the eyes when focusing on an object at a distance. The test uses a setup where the child views a target while their eye alignment is evaluated. When the ball is out of the B box, it indicates that there is a significant misalignment or phoria present. This failure in the initial screening suggests that the child is unable to maintain stable eye positioning under the given conditions, which is crucial for effective binocular vision. Detecting such misalignment is important, as it can signal the need for further assessment or intervention. The other scenarios, like the ball being inside the box or touching the boundaries, suggest that the child's eye alignment is within acceptable limits for the test. Only when the ball is clearly outside of the B box do we conclude that a further evaluation of the child’s visual system is necessary.