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{{HonorSubpage}}

<section begin=Body />

<b>1. <section begin=req1 /><noinclude></noinclude>Complete the following:
<noinclude></noinclude><section end=req1 /></b>

:<b>a. <section begin=req1a /><noinclude></noinclude>Perform this activity.

Be blindfolded. Let someone place an item between 15 metres to 20 metres away from you. Now search for the item. Record the time you found the item. Now, be blindfolded again. Let someone place the item somewhere else but within the same distance as before. Take off your blindfold. Search for the item. Record the time you found the item.
<noinclude></noinclude><section end=req1a /></b>

:<b>b. <section begin=req1b /><noinclude></noinclude>Watch the video: https://youtu.be/syaQgmxb5i0. Now answer the following questions:
:What is the sense of sight used for?
:How important is it?
<noinclude></noinclude><section end=req1b /></b>

:<b>c. <section begin=req1c /><noinclude></noinclude>How big is the human eye?
<noinclude></noinclude><section end=req1c /></b>

<b>2. <section begin=req2 /><noinclude></noinclude>Anatomy of the eye. Label the parts.
[[File:Label parts of the eye.png]]

[http://www.kscience.co.uk/animations/eye_function_drag.htm Eye Function Drag]<br />
Click on the link provided above and do the exercise on the functions of the parts of the eye. When complete check your answer. The system will then mark your work. Print and paste your work.
<noinclude></noinclude><section end=req2 /></b>

<b>3. <section begin=req3 /><noinclude></noinclude>How does a lens work? Complete the sentence below using the words from the box.

We have a lens in each of our _______________. This is a ______________ lens. The job of this lens is to ______________ the ________________ so we can_____________________. The point at which the rays cross is called the focus or the ____________________. The light is ________________________as it goes into the and as it comes back out.
<br />
{| cellpadding=5 style="border:2px solid #BBB"
|- bgcolor="#fafeff"
| '''eyes''' || || '''refracted''' || || '''light''' || || '''focal point'''
|- bgcolor="#fafeff"
| || '''focus''' || || '''see''' || || '''convex''' ||
|}
<noinclude></noinclude><section end=req3 /></b>

<b>4. <section begin=req4 /><noinclude></noinclude>Watch video:
<noinclude></noinclude><section end=req4 /></b>

:<b>a. <section begin=req4a /><noinclude></noinclude>Below are the steps in how humans see. Arrange them in a chronological order by putting numbers (1, 2, 3, 4, 5, 6) in the '''“position”''' column to reflect the right order in which they should be.
{| class="wikitable" cellpadding=7
|- align="center"
| '''Position''' || '''Steps'''
|-
| || When you look at an object, light reflected from the object goes through the '''pupil''' of your eye.
|-
| || Your brain sorts the image out so you see it the right way round.
|-
| || The '''cornea''' and the '''lens''' focus the light onto the retina.
|-
| || An '''inverted''' image is formed on the '''retina'''. The retina is made of light sensitive cells called photoreceptors.
|-
| || The iris, a muscle that controls the size of the pupil, allows the correct amount of light to enter your eye.
|-
| || When the image forms on the photoreceptors in the retina, chemical reactions produce and electrical impulse that travels up the '''optic nerve''' to your brain.
|}

<noinclude></noinclude><section end=req4a /></b>

:<b>b. <section begin=req4b /><noinclude></noinclude>Fill in the blank: A medical doctor who specialises in examining, diagnosing, and treating eyes and eye diseases is called a/an ____________________.
<noinclude></noinclude><section end=req4b /></b>

:<b>c. <section begin=req4c /><noinclude></noinclude>Visual acuity test, visual field test and tonometry test are tests that an ophthalmologist performs on the eye. Match the name of the term to its meaning:
{| class="wikitable"
|-
| Visual acuity test || ????? || A person reads an eye chart to measure how well he or she sees at various distances.
|-
| Visual field test || ????? || This test determines the fluid pressure inside the eye to evaluate for glaucoma.
|-
| Tonometry test || ????? || Ophthalmologists use this test to measure side, or peripheral, vision.
|}
<noinclude></noinclude><section end=req4c /></b>

:<b>d. <section begin=req4d /><noinclude></noinclude>What are the roles of:
<noinclude></noinclude><section end=req4d /></b>

::<b>i. <section begin=req4di /><noinclude></noinclude>Rods
<noinclude></noinclude><section end=req4di /></b>

::<b>ii. <section begin=req4dii /><noinclude></noinclude>Cones
<noinclude></noinclude><section end=req4dii /></b>

<b>5. <section begin=req5 /><noinclude></noinclude>How does the eyesight of humans compare with other creatures? Compare with any three of the following animals: eagles, owls, mantis shrimp, deer, goat, horse, elk, sheep, goat.
<noinclude></noinclude><section end=req5 /></b>

<b>6. <section begin=req6 /><noinclude></noinclude>Complete the following:
<noinclude></noinclude><section end=req6 /></b>

:<b>a. <section begin=req6a /><noinclude></noinclude>Compare the key features of the eye and a camera by finishing the table.

{| class="wikitable" cellpadding=7
|- align="center"
| '''Feature in a camera''' || '''Feature in an eye''' || '''Use'''
|-
| || Pupil ||
|-
| Lens || ||
|-
| Shutter || ||
|-
| || Retina || Receives light
|}

<noinclude></noinclude><section end=req6a /></b>

:<b>b. <section begin=req6b /><noinclude></noinclude>Write a paragraph below to compare how the eye and the camera work. Cover the following factors in your answer:
<noinclude></noinclude><section end=req6b /></b>

::<b>i. <section begin=req6bi /><noinclude></noinclude>Similarities: What features do they have in common? What does each convert the light energy into when it is processed? Which way up does the image form in both?
<noinclude></noinclude><section end=req6bi /></b>

::<b>ii. <section begin=req6bii /><noinclude></noinclude>Differences: How does the lens change in each to produce an image? How do the types of image made by each compare? How are the images captured and kept?
<noinclude></noinclude><section end=req6bii /></b>

<b>7. <section begin=req7 /><noinclude></noinclude>With reference to the eye chart explain:
<noinclude></noinclude><section end=req7 /></b>

:<b>a. <section begin=req7a /><noinclude></noinclude>20/20 vision
<noinclude></noinclude><section end=req7a /></b>

:<b>b. <section begin=req7b /><noinclude></noinclude>20/70 vision
<noinclude></noinclude><section end=req7b /></b>

<b>8. <section begin=req8 /><noinclude></noinclude>What is visual impairment?
<noinclude></noinclude><section end=req8 /></b>

<b>9. <section begin=req9 /><noinclude></noinclude>Define these eye problems and state their "cures".
<noinclude></noinclude><section end=req9 /></b>

:<b>a. <section begin=req9a /><noinclude></noinclude>Glaucoma
<noinclude></noinclude><section end=req9a /></b>

:<b>b. <section begin=req9b /><noinclude></noinclude>Cataracts
<noinclude></noinclude><section end=req9b /></b>

:<b>c. <section begin=req9c /><noinclude></noinclude>Strabismus
<noinclude></noinclude><section end=req9c /></b>

:<b>d. <section begin=req9d /><noinclude></noinclude>"Sore eyes"/conjunctivitis
<noinclude></noinclude><section end=req9d /></b>

:<b>e. <section begin=req9e /><noinclude></noinclude>Colour blindness
<noinclude></noinclude><section end=req9e /></b>

<b>10. <section begin=req10 /><noinclude></noinclude>Fill in the blanks: (Watch the video - https://youtu.be/ypF037wlYZg)
<noinclude></noinclude><section end=req10 /></b>

:<b>a. <section begin=req10a /><noinclude></noinclude>________________ is the bending of light when it passes through a transparent medium such as glass, lens or water.
<noinclude></noinclude><section end=req10a /></b>

:<b>b. <section begin=req10b /><noinclude></noinclude>The refractive errors are _______________, ___________________, ____________ and _______________.
<noinclude></noinclude><section end=req10b /></b>

:<b>c. <section begin=req10c /><noinclude></noinclude>_________________is also known as near-sightedness. People with this have eyes that are a little longer than normal, measuring from the front of the eyeball to the back. Therefore, light focuses in front of the retina instead of on it.
<noinclude></noinclude><section end=req10c /></b>

:<b>d. <section begin=req10d /><noinclude></noinclude>___________________ is also known as farsightedness. People with this have trouble focusing on things close up because their eyes are too "short" from front to back. Therefore, light focuses behind the retina instead of on it, causing blurry vision.
<noinclude></noinclude><section end=req10d /></b>

:<b>e. <section begin=req10e /><noinclude></noinclude>_____________________ is a condition in which your eye isn’t completely round. Therefore, light gets bent more in one direction than another. That means only part of an object is in focus so things at a distance may look blurry and wavy.
<noinclude></noinclude><section end=req10e /></b>

:<b>f. <section begin=req10f /><noinclude></noinclude>_________________ is the normal loss of near focusing ability that occurs with age. Most people begin to notice the effects of presbyopia sometime after age 40, when they start having trouble seeing small print clearly.
<noinclude></noinclude><section end=req10f /></b>

:<b>g. <section begin=req10g /><noinclude></noinclude>Read Genesis 48:10. Which of the refractive errors did Israel have?
<noinclude></noinclude><section end=req10g /></b>

:<b>h. <section begin=req10h /><noinclude></noinclude>State if the following statement below is true or false: “All the refractive errors can be corrected by wearing the right glasses or contact lens.”
<noinclude></noinclude><section end=req10h /></b>

<b>11. <section begin=req11 /><noinclude></noinclude>Eye care:
<noinclude></noinclude><section end=req11 /></b>

:<b>a. <section begin=req11a /><noinclude></noinclude>How should I clean my eyes?
<noinclude></noinclude><section end=req11a /></b>

:<b>b. <section begin=req11b /><noinclude></noinclude>Write one sentence on how we can strain our eyes.
<noinclude></noinclude><section end=req11b /></b>

:<b>c. <section begin=req11c /><noinclude></noinclude>How should we rest them?
<noinclude></noinclude><section end=req11c /></b>

:<b>d. <section begin=req11d /><noinclude></noinclude>Matthew has been using a computer continuously for 4 hours! Now he is complaining of eye strain. Give Matthew three pieces of advice to help him relax his eyes.
<noinclude></noinclude><section end=req11d /></b>

:<b>e. <section begin=req11e /><noinclude></noinclude>Explain the 20-20-20 rule of eye relaxation.
<noinclude></noinclude><section end=req11e /></b>

:<b>f. <section begin=req11f /><noinclude></noinclude>What do I do if I cannot see very well?
<noinclude></noinclude><section end=req11f /></b>

<b>12. <section begin=req12 /><noinclude></noinclude>Give two meanings to the expression “The eyes are a window to the soul.”
<noinclude></noinclude><section end=req12 /></b>

<b>13. <section begin=req13 /><noinclude></noinclude>What are the effects of exposing ourselves to watching:
<noinclude></noinclude><section end=req13 /></b>

:<b>a. <section begin=req13a /><noinclude></noinclude>Violence/pornography (mention three)
<noinclude></noinclude><section end=req13a /></b>

:<b>b. <section begin=req13b /><noinclude></noinclude>Video games: Give three advantages and disadvantages
<noinclude></noinclude><section end=req13b /></b>

:<b>c. <section begin=req13c /><noinclude></noinclude>Social media: Give three advantages and disadvantages
<noinclude></noinclude><section end=req13c /></b>

<b>14. <section begin=req14 /><noinclude></noinclude>Explain 1 Samuel 16:7.
<noinclude></noinclude><section end=req14 /></b>

<b>15. <section begin=req15 /><noinclude></noinclude>Explain “fixing our eyes on Jesus.” (Hebrews 12:2)
<noinclude></noinclude><section end=req15 /></b>

<b>16. <section begin=req16 /><noinclude></noinclude>Mention four ways that life can be made easier for the visually impaired.
<noinclude></noinclude><section end=req16 /></b>

<b>17. <section begin=req17 /><noinclude></noinclude>Optical illusion:
<noinclude></noinclude><section end=req17 /></b>

:<b>a. <section begin=req17a /><noinclude></noinclude>Fill in the blanks using the word bank in the box below the passage.

_____________ Illusions can use colour, ______________ and patterns to create ___________ that can be deceptive or misleading to our _____________. The information gathered by the eye is processed by the brain, creating a perception that in reality, does not match the true image. Perception refers to the interpretation of what we take in through our _____________. Optical illusions occur because our brain is trying to _______________ what we see and make sense of the world around us. Optical illusions simply trick our brains into seeing things which may or may not be _____________.

<br />
{| cellpadding=5 style="border:2px solid #BBB"
|- bgcolor="#fafeff"
| '''images''' || || '''eyes''' || || '''brains''' || || '''optical''' || || '''real''' || || '''light''' || || '''interpret'''
|}
<noinclude></noinclude><section end=req17a /></b>

:<b>b. <section begin=req17b /><noinclude></noinclude>Provide the answers to the optical illusions below.

:'''Hermann Grid Illusion'''
::How many black dots are in this image?
[[File:HermannGrid.gif|300px|Hermann Grid Illusion]]

:'''Rotating Snakes Illusion'''
::Are the circles moving in the image?
[[File:Rotating snakes peripheral drift illusion.svg|380px|Rotating Snakes Illusion]]

:'''Café Wall Illusion'''
::Are the horizontal lines sloping or straight?
[[File:Café wall.svg|300px|Café Wall Illusion]]

:'''Müller-Lyer Illusion'''
::Take a very close look at the 2 line segments. Do you think one line is longer than the other?

[[File:Muller-Lyer figure.svg|300px|Müller-Lyer Illusion]]

:'''Lightbulb Illusion'''
::Stare closely at this lightbulb for 25 seconds. Then immediately stare at a white wall or sheet of paper. What do you see?
[[File:Lightbulb inverted colors.png|170px|Lightbulb with colors inverted]]

:'''Shepard's Elephant Illusion'''
::How many legs do I have?
[[File:Elephant legs illusion, variant of Roger Shepard's L'egsistential paradox.png|300px|Elephant Legs]]

:'''Teach or Learn'''
::In this illusion you can see the word Teach and its reflection. Can you read the reflection too? What does it say?
[[File:TeachLearn Illusion.png|300px|Word Illusion]]

:'''Animal Illusion'''
::How many animals do you see in the image?

[[File:Duck-Rabbit illusion.jpg|300px|Duck/Rabbit Illusion]]

<noinclude></noinclude><section end=req17b /></b>

<section begin=challenge />
<b>18. <section begin=req18 /><noinclude></noinclude>Watch the video on how to do an origami eye. Make an origami eye.
{{#widget:YouTube|id=a2SU3jRoV_4}}
<noinclude></noinclude><section end=req18 /></b>
<section end=challenge />
<section end=Body />

<noinclude>[[Category:Honor Requirements|{{#titleparts:{{PAGENAME}}|1|2}}]]
[[Category:Honor Requirements Revision 3|{{#titleparts:{{PAGENAME}}|1|2}}]]
<noinclude></noinclude>

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 <b>1. <section begin=req1 /><noinclude></noinclude>Complete the following:

AY Honors/Sight/Requirements/en - Revision history

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