Contact Lenses

8 Questions | By Denizly | Updated: Oct 7, 2018 | Attempts: 321

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1.

Plastic lenses are no longer used today
- A.
  
  True
- B.
  
  False
Correct Answer
B. False

Explanation
Gas permeable (GP) lenses are made of plastic that can transmit oxygen. These are still used today to treat specific vision problems.

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2.

In 1948, Kevin Touhy was sanding down a contact lens and accidentally made it smaller. This led to the first corneal lens. Why were corneal lenses such a breakthrough in the contact lens industry?
- A.
  
  They could be used to change the color of the iris.
- B.
  
  Sclera lenses were uncomfortable.
- C.
  
  Corneal lenses don't cover the entire eye, allowing oxygen to reach it.
- D.
  
  Sclera lenses didn't correct any vision problems, whereas corneal ones did.
Correct Answer
C. Corneal lenses don't cover the entire eye, allowing oxygen to reach it.

Explanation
A major issue with sclera (the white of the eye) lenses were that they covered the entire eye. This prevented oxygen of passing to the eye and made them difficult to wear for a long period of time. Corneal lenses covered less of the eye, allowing contact with oxygen.

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3.

Silicone and soft contact lenses are made of ________ ("water-loving") plastic polymers called ________which can absorb ________ and become soft and pliable without losing their ________ qualities. These polymers are also permeable to ________, allowing for extended use without suffocating the eye.

Correct Answer
hydrophilic
hydrogels
water
optical,
oxygen

Explanation
Above is a description of hydrogel which is used in the soft and silicone contact lenses.

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4
4.

Silicone hydrogel lenses are the most popular type used in the US.
- A.
  
  True
- B.
  
  False
Correct Answer
A. True
5.

Materials science centers on the _______________ of various materials.
- A.
  
  Structure
- B.
  
  Performance
- C.
  
  Processing
- D.
  
  Properties
- E.
  
  All of the above
Correct Answer
E. All of the above

Explanation
Materials science focuses on the structure, process, properties and performance of various materials to ensure the best results when used. Advancements in science and engineering allow for improvements in all of these factors.

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6.

Watch the video: You're Cleaning Your Contact Wrong, Probably https://www.youtube.com/watch?v=9fzQBNH5Cp4 What percent of contact wearers are not properly caring for their contacts?
- A.
  
  70%
- B.
  
  80%
- C.
  
  90%
- D.
  
  99%
Correct Answer
D. 99%

Explanation
Using water to clean contacts, sleeping in contacts, and not cleaning daily are just a few ways that contact lens wearers are not properly caring for their contacts.

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7.

Watch the video: You're Cleaning Your Contact Wrong, Probably https://www.youtube.com/watch?v=9fzQBNH5Cp4 You don't have to rub your contacts when cleaning them.
- A.
  
  True
- B.
  
  False
Correct Answer
B. False

Explanation
Even solutions that say "no rub" don't clean off all of the microbes that may collect on a contact lens. Always rub contact lenses to clean off all possible dirt and microbes.

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Current Version
Oct 07, 2018

Quiz Edited by
ProProfs Editorial Team
Oct 06, 2018

Quiz Created by
Denizly

Contact Lenses

Plastic lenses are no longer used today

In 1948, Kevin Touhy was sanding down a contact lens and accidentally made it smaller. This led to the first corneal lens. Why were corneal lenses such a breakthrough in the contact lens industry?

Silicone and soft contact lenses are made of ________ ("water-loving") plastic polymers called ________which can absorb ________ and become soft and pliable without losing their ________ qualities. These polymers are also permeable to ________, allowing for extended use without suffocating the eye.

Silicone hydrogel lenses are the most popular type used in the US.

Materials science centers on the _______________ of various materials.

Watch the video: You're Cleaning Your Contact Wrong, Probably https://www.youtube.com/watch?v=9fzQBNH5Cp4 What percent of contact wearers are not properly caring for their contacts?

Watch the video: You're Cleaning Your Contact Wrong, Probably https://www.youtube.com/watch?v=9fzQBNH5Cp4 You don't have to rub your contacts when cleaning them.

Silicone and soft contact lenses are made of ("water-loving") plastic polymers called which can absorb and become soft and pliable without losing their qualities. These polymers are also permeable to , allowing for extended use without suffocating the eye.