Question

2 multiple choice 1 point
your field of vision is ______________.
○ focal vision
● everything within 180 degrees in front of you
○ paracentral vision

3 multiple choice 1 point
to read signs, you need to have good ______ .
○ focal vision
○ paracentral vison
○ double vision

4 multiple choice 1 point
______ vision is first affected by fatigue, drugs and speed
○ focal vision
○ paracentral vision
○ peripheral vision

Explanation:

Question 2

The field of vision (visual field) for a human in the horizontal plane, when looking straight ahead, is approximately 180 degrees in front (combining both eyes' fields, with some overlap). Focal vision is the central, detailed vision, and paracentral is a subset of central vision. So the correct option is the one describing the 180 - degree front area.

Focal vision is the sharp, central vision used for detailed tasks like reading signs. Paracentral vision (note: "vison" is likely a typo for "vision") is more for detecting objects near the center, and double vision is an abnormal condition. So good focal vision is needed for reading signs.

Peripheral vision (the vision outside the central focal area) is more sensitive to being affected by factors like fatigue, drugs, and speed. Focal vision is more stable for detail, and paracentral is part of central vision. So peripheral vision is the one first affected.

Answer:

B. everything within 180 degrees in front of you (assuming the options are labeled as A: focal vision, B: everything within 180 degrees in front of you, C: paracentral vision)

Question 3