Game Quiz :: AeroMed : Occular Acuity & Anatomy

Topic 18254 | Page 1

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Patrick C.'s Comment
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I know some of you are thinking: What does AeroMed have to do with Trucking. Simple answer is more than you think.

I am going to throw out some basics questions about your eyes on this one. You need to see to drive. Let's find out how well you know your eyes.

1) the 2 structures inside your eyes for processing light?

2) what chemical is used in each respective structure?

3) What is the location and field of view of your day blind spot? What caused this blind spot?

4) What is the location and field of view for your night blind spot? What is the cause of this blind spot?

Good Luck all.

p.s.: Rick put down the keyboard and mouse. No wicki on this one.

Kurt G.'s Comment
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Rods and cones, i think. And the blind spot is where the optic nerve attaches to the retina. I don't know the rest.

Tractor Man's Comment
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I have no clue. I can see just fine.

smile.gif

Patrick C.'s Comment
member avatar

I will let a few more take a crack at it, then I will give the answer. I think after that I will do visual illusions.

Btw, the 3 things you knew are correct, kurt.

So the 2 structures are rods and cones and the Day blind spot is caused by where the optic nerve attaches to the retina. The reason there is a blind spot; is because, there are no light sensing structures located at that spot.

Lots of parts still to get out there.

Sambo's Comment
member avatar

I know some of you are thinking: What does AeroMed have to do with Trucking. Simple answer is more than you think.

I am going to throw out some basics questions about your eyes on this one. You need to see to drive. Let's find out how well you know your eyes.

1) the 2 structures inside your eyes for processing light?

2) what chemical is used in each respective structure?

3) What is the location and field of view of your day blind spot? What caused this blind spot?

4) What is the location and field of view for your night blind spot? What is the cause of this blind spot?

Good Luck all.

p.s.: Rick put down the keyboard and mouse. No wicki on this one.

1. I'm going to say retina and iris.

2. I'm going to say water, cause I have no clue.

3. Day field of view is going to be 170 degrees, and no idea.

4. Going to say night field of view is going to be 90 degrees, because again, I don't know. I'm going to say that, while your pupils expand at night to allow more light to enter, your eyes will tend to focus more on what is in front of you due to the dim conditions.

So, yeah...how'd I do?

smile.gif

Patrick C.'s Comment
member avatar

The FOV is about the size of each respective blind spot. A humans FOV doesn't much change it is rougjly 120 degrees vertical by 150 degrees horizontal. Only 10 degrees can be focused on at 1 time even then only a single degree is of sharp contrast.

Patrick C.'s Comment
member avatar

Since I guess people are done trying to take stabs at this.

1) The structures are Rods and Cones.

2) the 2 chemicals are Rhodopsin (Rods) and Iodopsin (Cones)

Cones allow full spectrum viewing. Cones are most reactive to the color yellow. Rods are 10k times more sensitive to light than Cones, but are very limited in color and acuity. Rods basically are restricted to the Violet shifts of light. Rhodopsin (Rods) is also called visual purple.

3) The Day blind spot (which is also called your physiological blind spot) is caused by the location of where the optic nerve connects to the retina. There are no light sensing structures in this location. It encompasses 5.5 to 7.5 degrees of vision and is roughly 15 degrees off center. One of the reasons we don't notice this blind spot is each blind spot is on opposite sides for each eye. (Left vs Right).

4) the night blind spot is in the center of your vision and encompasses 5 to 10 degrees. This blind spot is caused by the absence of Rod structures in the heavily Cone concentrated area known as the Fovea Centralis. When viewing objects at night that are immiting no light it is best to look off to the side of that object so it doesn't disappear.

Bonus. There are 3 types of vision Photopic, Mesopic, Scotopic. Photopic is using Cones (Day time). Mesopic vision is using both Rods and Cones (Dawn and Dusk). Scotopic vision is using Rods (Night vision).

SAP:

Substance Abuse Professional

The Substance Abuse Professional (SAP) is a person who evaluates employees who have violated a DOT drug and alcohol program regulation and makes recommendations concerning education, treatment, follow-up testing, and aftercare.

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