Perception should not be evaluated until the transducer is checked out.
In our previous discussion, we have used visual illustrations to demonstrate particular important perceptual processes. The principles, however, applied to all modalities.
We will now be discussing some perceptual skills that pertain only to the visual modality. Before discussing visual perception, however, we should note the importance of the transducer as a prerequisite to perception.
The role of the perceptual process is somewhat less discernable when the transducer is functioning abnormally. Hence, before one considers (or one tests) perception, the transducer should first be evaluated.
As a transducer, the eye is no less a marvelous mechanism than the ear. We will not take the time here, however, to describe it in the detail we did for the ear.