This topic contains a solution. Click here to go to the answer

Author Question: The near point of a farsighted person's uncorrected eyes is 80 cm. What power contact lens should be ... (Read 48 times)

tichca

  • Hero Member
  • *****
  • Posts: 554
The near point of a farsighted person's uncorrected eyes is 80 cm. What power contact lens should be used to move the near point to 25 cm from this person's eyes?
 
  A) 2.8 diopters
  B) -2.8 diopters
  C) -4.0 diopters
  D) -4.2 diopters
  E) 4.2 diopters

Question 2

A man is nearsighted and cannot see things clearly beyond 110from his eyes. What is the focal length of the contact lenses that will enable him to see very distant objects clearly?
 
  A) 50 cm
  B) -50 cm
  C) -110 cm
  D) 110 cm
  E) -30 cm

Question 3

A nearsighted physicist cannot see things clearly beyond 90 cm from her eyes. What is the power of the contact lenses that will enable her to see very distant objects clearly?
 
  A) 1.1 diopters
  B) -1.1 diopters
  C) -1.7 diopters
  D) -2.2 diopters
  E) 2.2 diopters



Related Topics

Need homework help now?

Ask unlimited questions for free

Ask a Question
Marked as best answer by a Subject Expert

yahahah24021

  • Sr. Member
  • ****
  • Posts: 323
Answer to Question 1

A

Answer to Question 2

You just saved me a lot of time. ;)

Answer to Question 3

B




tichca

  • Member
  • Posts: 554
Reply 2 on: Jul 29, 2018
Great answer, keep it coming :)


kthug

  • Member
  • Posts: 332
Reply 3 on: Yesterday
Wow, this really help

 

Did you know?

The modern decimal position system was the invention of the Hindus (around 800 AD), involving the placing of numerals to indicate their value (units, tens, hundreds, and so on).

Did you know?

Not getting enough sleep can greatly weaken the immune system. Lack of sleep makes you more likely to catch a cold, or more difficult to fight off an infection.

Did you know?

The familiar sounds of your heart are made by the heart's valves as they open and close.

Did you know?

Sildenafil (Viagra®) has two actions that may be of consequence in patients with heart disease. It can lower the blood pressure, and it can interact with nitrates. It should never be used in patients who are taking nitrates.

Did you know?

Pope Sylvester II tried to introduce Arabic numbers into Europe between the years 999 and 1003, but their use did not catch on for a few more centuries, and Roman numerals continued to be the primary number system.

For a complete list of videos, visit our video library