« previous next »

Author Question: You are designing contact lenses for someone whose near point is 43 cm. What focal length lens ... (Read 73 times)

stevenposner

  • Hero Member
  • *****
  • Posts: 608
on: Jul 28, 2018
You are designing contact lenses for someone whose near point is 43 cm. What focal length lens should you prescribe so that an object can be clearly seen when placed at 25 cm in front of the eye?
 a. 43 cm
  c. -15 cm
  b. 18 cm
  d. 60 cm

Question 2

A lens with a focal length of 12 cm has what refractive power?
 a. 5.0 diopters
  c. 6.7 diopters
  b. 9.6 diopters
  d. 8.3 diopters


Anton

  • Sr. Member
  • ****
  • Posts: 302
Reply #1 on: Jul 28, 2018
Answer to Question 1

D

Answer to Question 2

D


Related Topics

Need homework help now?

Ask unlimited questions for free

Ask a Question
« previous next »
 

Did you know?

Liver spots have nothing whatsoever to do with the liver. They are a type of freckles commonly seen in older adults who have been out in the sun without sufficient sunscreen.

Did you know?

More than 150,000 Americans killed by cardiovascular disease are younger than the age of 65 years.

Did you know?

It is widely believed that giving a daily oral dose of aspirin to heart attack patients improves their chances of survival because the aspirin blocks the formation of new blood clots.

Did you know?

Eating carrots will improve your eyesight. Carrots are high in vitamin A (retinol), which is essential for good vision. It can also be found in milk, cheese, egg yolks, and liver.

Did you know?

The FDA recognizes 118 routes of administration.

The metric system specifies fasteners by diameter, length, and pitch. The metric system specifies fasteners by diameter, length, and pitch.
The left-hand rule states that if a coil is grasped with the left hand, the fingers will point in ... The left-hand rule states that if a coil is grasped with the left hand, the fingers will point in ...
How to find the equation of a line that is perpendicular to a line passing through a point How to find the equation of a line that is perpendicular to a line passing through a point
Two-point discrimination Two-point discrimination
Lens accommodate Lens accommodate
What is the length of the staircase? What is the length of the staircase?
Video: Integumentary Anatomy

For a complete list of videos, visit our video library