Final answer:
To avoid being temporarily blinded by oncoming vehicle headlights, look to the side of the road or use the right edge of the road as guidance instead of looking directly at the lights.
Step-by-step explanation:
When an approaching vehicle with its headlights on is coming toward you, it is important not to look directly into them as you could be temporarily blinded. Instead, you should look to the side of the road or use the right edge of the road as a guide. This way, you are less likely to be disoriented or dazzled by the bright lights, which can create a safety risk if it affects your ability to see the road clearly.
Headlights effectively trap and direct light in a beam, which is useful for the driver of the vehicle but can be problematic for oncoming traffic. By using the right side of the road for visual guidance, you can help maintain your night vision and prevent temporary blindness or the distraction that can result from the glare of oncoming headlights.