Iris Retina
Pupil Vitreous
Cornea Tear duct
Eye Lid Lens Heavy
cone area
Eye Lash Heavy
Rod Area Optic
nerve
You may need to draw arrows, as this is the original diagram and the arrows I added afterwards will not copy over. Make sure you use all of the parts!
Please explain what each part of the eye
is and its function
Cornea
|
Optic nerve
|
Pupil
|
Retina
|
Vitreous
|
Tear Duct
|
Rods
|
Iris
|
Cones
|
Lens
|
Using your phones or internet, research what can happen if
you injure a part of your eye in the following way.
Anatomic Site
|
Defect
|
Visual Problem
|
Lens
|
Becomes cloudy or cataract diagnosis
(cataract)
|
|
Cornea
|
Scratched or scraped (usually
from trauma)
|
|
Pupil and iris
|
Paralyzed (this is what happens
when an optometrist dilates the eye)
|
|
Retina
|
Tears or bleeds
|
END OF ASSIGNMENT
Disorders of the Eye
Please use the computers to research the following disorders of the eye and any available treatment.
1. Nearsightedness (Myopia):
2. Farsightedness (hyperopia):
3. Presbyopia:
4. Astigmatism:
5. Eye floaters:
6. Amblyopia:
7. Night Blindness:
8. Strabismus:
9. Color Blindness:
10. Photophobia:
end of assignment
Chapter 4 Guided
Reading (88-117)
1.
Explain the difference between sensation and
perception.
2.
Explain the difference between the terms white light and color.
3.
Explain how eye glasses work to correct vision
(page 93)
4.
What do we call light outside the visible
spectrum?
5.
Explain why human beings cannot see infrared
light or UV light. Which animals do see these lights and why?
6.
Explain the major differences between a rod and
a cone. Which shuts off at night and why? When light is dim, why is it best to
look slightly away from the object?
7.
What three colors make up color vision?
8.
A) What does it mean to be completely color
blind?
B) How is this difference from the
form of color blindness that is most common?
9. Using the article “How Do We Hear?” and your book pages
100 and 101, answer the questions 9 and 10.
A) What are the functions of the following parts of the ear:
i.
Eardrum
ii.
Cochlea
iii.
Cilia
iv.
Auditory nerve
B) What do the
following terms refer to?
i.
Pitch:
ii.
Intensity:
iii.
Decibel:
C) How long can a person be exposed to a chainsaw before long term damage will occur?
What can happen if a person is standing right next a jet as it takes off,
without proper safety gear?
10. What are the three types of skin receptors?
11. What is another name for smell? What are the functions
of the cilia and olfactory bulbs?
12. What are the four types of taste receptors humans have?
How do salt needs change as we get older?
13. Explain how depth perception played a role in the visual
cliff experiment on page 109.
end of assignment
Unit 3, Ch 4 Notes
Sensation vs. Perception
• Sensation
is the process of receiving information from the environment
• Perception:
The process of assembling and organizing sensory information to make it meaningful.
• Absolute
threshold: Level of sensory stimulation needed to register with the brain
• Eventually,
you adapt to types of sensory information, meaning you are exposed to a
stimulus for so long, you no longer notice it.
• Example:
traffic, train engines, humming, “white noise”
Color Blibdbess
• Total
color blindness (Monochromacy)
– These
are people who respond to light only with rods.
Partial color blindness
• Anomalous trichromacy:
when one of the three color cones is damaged or missing
• Deuteranomaly,
caused by a similar shift in the green retinal receptors, is by far the most
common type of color vision deficiency, mildly affecting red–green hue
discrimination in 5% of European males. It is hereditary and sex-linked.
• Tritanomaly
is a rare, hereditary color vision deficiency affecting blue–green and yellow–red/pink
hue discrimination. Unlike most other forms, it is not sex-linked, it is
related to Chromosome "7".
The Taste Buds
• Your
taste buds work together to detect different flavors, such as mesquite BBQ
pork, chili cheese dogs, sushi, chocolate, peas, apples, and lemonade.
• Your
taste buds weaken as you age-enjoy that hot sauce now.
