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Eyes

written by: eyez2k1ss
 
How much do you know about this amazing organ?

Question 1:


Unlike most animals' eyes, the eyes of fish and snakes usually have a fixed lens size. How do these animals' eyes focus then?
By telescoping the lens
By rotating the lens
By tilting the lens
By bending the lens

Question 2:


Which of these species has the most complex color vision known?
The Great white shark
The Bengal tiger
The Tarantula
The Mantis shrimp

Question 3:


What is the maximum angle of field of vision compound eyes can have?
200 degrees
310 degrees
290 degrees
360 degrees

Question 4:


Almost all organisms on Earth have a vision restricted to small range of the electromagnetic spectrum (between 320 and 800 nm). This is considered to be a consequence of which of these evolutionary facts?
Life emerged on another planet
The atmosphere had different composition when life emerged
Life emerged underwater
At the time when life emerged, the electromagnetic spectrum was different

Question 5:


If compared to a camera, what part of the human eye is its aperture?
Pupil
Iris
The cones
Optic nerve

Question 6:


Iridology is a branch of ophthalmology that deals with diseases and treatment of the human iris.
False
True

Question 7:


Which of these activities can cause permanent damage to the eyes?
None of these
Reading small print
Reading in poor light
Prolonged reading

Question 8:


In order to achieve the widest possible field of view, these animals have their two eyes positioned on opposite sides of their heads.
Prey animals
None of these
Predatory animals
Underwater animals

Question 9:


Stereopsis is a process in visual perception giving the organism a sensation of what?
Color
Movement
Width
Depth

Question 10:


Chameleons have some of the most distinctive eyes among the reptiles. The two separately moving and focusing eyes of a chameleon give it a full 360-degree arc of vision around its body, but can they also ensure sharp clear focusing on one single object?
No
Yes

 


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