How Vision Works

What is vision?

• The process of using light reflecting off things to create the ability to see

• The process of using sound to create the ability to see

• The process of using taste to create the ability to see

• The process of using touch to create the ability to see

What are the main types of photoreceptors in the retina?

• Optic nerves and cones

• Cones and lenses

• Rods and cones

• Rods and optic nerves

What do rods mainly detect?

• Differences in brightness

• Different colors

• Details and colors

• Brightness and details

What are optic nerves compared to in the analogy provided in the text?

• Data cables

• Lenses

• Photoreceptors

• Retinas

What is visual acuity?

• How well you see

• How well you hear

• How well you taste

• How well you smell

Tags

NGSS.MS-LS1-8

What does 20/20 vision mean?

• Seeing an object 15 feet away correctly

• Seeing an object 20 feet away correctly

• Seeing an object 25 feet away correctly

• Seeing an object 40 feet away correctly

What’s the difference between vision and sight?

• Vision and sight are the same thing

• Vision and sight are unrelated to each other

• Vision requires the ability to process signals from your eyes, while sight refers to how your eyes detect light

• Vision refers to how your eyes detect light, while sight requires the ability to process signals from your eyes

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NGSS.MS-LS1-8

What can negatively affect your health and vision?

• Diabetes

• Wearing eyeglasses

• sleeping 8 hours per night

• Eating eggs

What should you do if you have sudden changes in or loss of vision?

• Wait for a few days to see if it improves

• Increase screen time

• Seek medical care immediately

• Ignore it as it may be temporary

What is the role of the brain in the vision process?

• Transmits signals to the optic nerves

• Controls the focus of the eyes

• Converts light into electrical signals

• Receives and decodes the signals from the eyes

Tags

NGSS.MS-LS1-8