Exercise Eye and Vision 1. \"Eye shine\" in nocturnal mammals is different from

Question

Exercise Eye and Vision 1. "Eye shine" in nocturnal mammals is different from the red eye" seen in some flash pbstographs E 22 Review Name Lab Date shine is the reflection of Eye light off the tapetum lucidum. What visual mechanism might explain red eye? 2·Label the following illustration using the terms provided. anterior chamber lens retina choroid opbe nerve sclera Sagittal section of the eye 3. Since the lens is made of protcin, what efiect migh the preseab have on the structure of the lens? How might this affect the clarity? 4. What is the consensual reflex of the pupil?

Explanation / Answer

1.when during photography, the flashlight is too fast for the pupil to close. when so much of such very bright light passes into the eye through the pupil ,it is reflected back from fundus at the back of the eyeball, from the retina and out through the pupil. and this is what is recorded by the camera The red color is due to the ample amount of blood in at the back of the eye, behind the retina.

2.

a.sclera

b choroid

c retina

d otpic nerve

e anterior chamber

f lense

3.The preserving fluid used in the lab causes the denaturation of the protein molecules present in the eye by leading them to unwind, as a result, the eye lens becomes opaque (otherwise a transparent structure). This reduces the clarity of vision and leads to blurred vision due to less light reaching the retina.

4. consensual reflex in the body is the response of one part of body one another part is subjected to a stimulus.Likewise, if one eye is exposed to the bright light while the other is covered, this will lead to the constriction of both the pupils and not just one.This is because the signal sent through one optic nerve is received back to both the right and the left oculomotor nerves via  Edinger-Westphal nucleus

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