Typically, drivers need about 30-45 degrees of direct vision ahead to gather all necessary information while driving. This allows them to see potential hazards, road signs, traffic lights, and other important details for safe navigation.
Direct vision involves seeing an object directly through observation, such as looking at cells under a microscope. Indirect vision involves using instruments like mirrors or lenses to view an object that cannot be seen directly, like examining the back of the eye with an ophthalmoscope.
Field of vision refers to the total area in which an individual can see while their eyes are fixed straight ahead. It encompasses both central vision (focused vision) and peripheral vision (side vision). A larger field of vision allows for a wider range of visual information to be perceived.
What lies ahead. Never, never use lay without a direct object.
When it is lawful and safe to do so and you have a clear field of vision ahead.
Varies from person to person but about 180 degrees.
You should scan ahead as far as you can see
Rock on, dude!
Central vision refers to the clear, detailed vision that occurs at the center of our field of view. Fringe vision includes the area surrounding central vision and provides some detail but less clarity. Peripheral vision refers to the outer edges of our vision field, detecting motion and objects in our surroundings but with limited detail.
It depends. In the present tense it is lie ahead. In the past tense it is lay ahead. Because lay is the past tense of lie. Do not confuse this with the verb lay, which means to put something down. I may lay an ambush. But the ambush lies ahead. Now that I am past the ambush it does not bother me that it lay ahead.
The area that is visible to the patient when they look straight ahead is the central visual field. This is where the focus of their vision lies, allowing them to see objects clearly and in detail.
backing out- you have considerably less vision