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Exam (elaborations)

Nao Book + Test review Book Exam Questions and Answers

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Nao Book + Test review Book Exam Questions and Answers The first successful contact lens were molded to the shape of the cornea known as: Corneal Hapatic Interpalpebral Gas Permeable - ANSWER-Hapatic Corneal Contact lenses: Are a typical soft contact lens design Bridge the limbus and some ...

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  • October 30, 2024
  • 110
  • 2024/2025
  • Exam (elaborations)
  • Questions & answers
  • NAO
  • NAO
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FIRST PUBLISH OCTOBER 2024




Nao Book + Test review Book Exam

Questions and Answers


The first successful contact lens were molded to the shape of the cornea known as:


Corneal


Hapatic


Interpalpebral


Gas Permeable - ANSWER✔✔-Hapatic


Corneal Contact lenses:


Are a typical soft contact lens design


Bridge the limbus and some of the sclera


Are last resort contact lenses


Are common designs for rigid and gas perm contacts - ANSWER✔✔-Are common designs for rigid and

gas perm contacts



Page 1/110

, ©EMILLECT 2024/2025 ACADEMIC YEAR. ALL RIGHTS RESERVED

FIRST PUBLISH OCTOBER 2024




The majority of soft lenses fit today are:


Corneal


Hapatic


Semi scleral


Hydrophobic - ANSWER✔✔-Semi scleral


A liquid coming in contact with a hydrophilic lens material with a relatively small wetting angle would be

likely to:


Form beads on the surface


Quickly evaporate


Spread evenly over the surface


None of the above - ANSWER✔✔-Spread evenly over the surface


A contact lens with a diameter larger than that of the cornea is called a ____ lens.


Corneal


Hydrophilic


Hydrophobic

Page 2/110

, ©EMILLECT 2024/2025 ACADEMIC YEAR. ALL RIGHTS RESERVED

FIRST PUBLISH OCTOBER 2024




Hapatic - ANSWER✔✔-Hapatic


All of the following are symptoms of a loose fitting lens except:


Constant awareness


Lid sensation


Burning


None of the above - ANSWER✔✔-Burning


Of those curves listed, which indicates the flattest base curve?


7.5 mm


37.50 D


8.6 mm


49.00 D - ANSWER✔✔-37.50 D


A contact lens was ordered with a base curve of 7.85 mm but was received back from the lab with a base

curve of 7.80 mm. The base cure of the actual lens is:


0.25 D flatter


0.25 D steeper

Page 3/110

, ©EMILLECT 2024/2025 ACADEMIC YEAR. ALL RIGHTS RESERVED

FIRST PUBLISH OCTOBER 2024




0.50 D flatter


0.50 D steeper - ANSWER✔✔-0.25 D steeper


It is noticed that a rigid CL containing a base curve of 7.42mm is fitting quite loose. A tighter fit may be

achieved by changing the B.C. to:


7.46 mm


7.85 mm


8.04 mm


None of the above - ANSWER✔✔-None of the above


A CL has a B.C. of 7.50 mm. Its posterior peripheral curve would most likely be:


7.45 mm


42.50 D


75.35 mm


30.00 D - ANSWER✔✔-42.50 D


The secondary curve of a rigid contact lens generally:


Is steeper than the CPC (Central posterior curve)

Page 4/110

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