Final answer:
The phenomenal field involves a person's entire perceptual experience, while foveal vision relates to the sharp central vision required for high-acuity tasks. When focusing on the letter 'G' in 'ROGERS', it appears clear due to foveal vision, but surrounding letters are less clear as they're perceived by peripheral vision.
Step-by-step explanation:
The phenomenal field in psychology refers to the entirety of a person's experiences and perceptions at any given time.
This concept is central to the humanistic perspective of psychology, particularly attributed to Carl Rogers. Now, while this doesn't directly relate to vision or clarity as inferred from the examples given, let's address the question about foveal vision.
Foveal vision pertains to the central part of a person's field of vision, which is capable of high-acuity visual tasks, such as reading. When you look directly at the letter 'G' in the word 'ROGERS', it is your foveal vision that allows you to see 'G' with great clarity.
The clarity of the letters on either side of 'G' diminishes because they fall outside the foveal region and are perceived by your peripheral vision, which is less adept at discerning fine details.