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How Much Do You Know About Your Eyes?

written by: thaibob
 
I hope you will find this quiz interesting. It may also give you some valuable information.

Question 1:


Eye color can change.
True
False

Question 2:


If your eyes are blue, you share a common ancestor with every other blue-eyed individual in the world.
True
False

Question 3:


Which statement below is FALSE?
100 million “rods” help you distinguish black and white.
Less than a tenth of your visual receptors actually detect color.
Each eye contains 107 million cells and 7 million of them are light sensitive.
Seven million “cones” help you see color and detail.

Question 4:


Eyes blink on average of 17 times per minute. This means that in the course of a year, you blink approximately how many times?
3.1 million
3.8 million
4.5 Million
5.2 million

Question 5:


The eye muscle is the fastest reacting muscle in the body.
False
True

Question 6:


About what percentage of the people will need reading glasses between the ages of 43 and 50?
69
99
89
79

Question 7:


Age is the most common cause of cataract.
False
True

Question 8:


Which of these diseases can be detected during an eye exam?
Lyme disease
Cancer
Type 2 diabetes
Tuberculosis

Question 9:


You see with your eyes and not, as believed, with your brain.
True
False

Question 10:


Glaucoma could lead to blind spots in one of your eyes, which cannot be corrected.
True
False

Question 11:


20/20 vision is a term used to express normal visual acuity.
True
False

Question 12:


How long will it take to repair a corneal scratch with proper care?
48 hours
72 hours
96 hours
24 hours

Question 13:


Newborns don’t produce tears.
False
True

Question 14:


The first eyeball transplant was done in 2012.
True
False

Question 15:


An eyeball is about an inch (25.4mm) in diameter and weighs around 0.25 ounces (7.08grams).
True
False

Question 16:


What is Heterochromia?
a difference in coloration of the the eyes
a disease of the eyes which destroys the 'cones'
the state of having only black and white vision
a disease of the eyes which destroys the 'rods'

Question 17:


How many muscles control the movement of the eye?
six
ten
eight
one

Question 18:


How many working parts are there in an eye to make it fully functional?
one million
1.5 million
two million
500,000

Question 19:


Which creatures' eye corneas are most suited for replacement in eye surgeries?
dolphins
porpoises
sharks
salmon

 


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