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Take Test CET C9375

 
The Significance Of The Minkwitz Condition Upon The Field Of View Of Progressive Power Lenses
1 General CET Point
To receive your CET point for this article, complete the following Multiple Choice Questions.
Participants who achieve a minimum of 4 out of 6 correct answers will receive one credit towards the General Optical
Council CET Scheme or one point towards the Association of Optometrists Ireland Scheme.
Only one attempt is allowed: The deadline for responses is 30th June 2009
*1: An increase in near (reading) addition on a progressive power lens leads to
A: No effect on unwanted astigmatism
B: Decrease in unwanted astigmatism
C: Increase in unwanted astigmatism
D: Change in axis of unwanted astigmatism
*2: Which of the following would not have an effect on field of view?
A: Lens power
B: Lens diameter
C: Lens Material
D: Aperture position
*3: Which step below is missed out in modern day free-form (aka advanced digital surfacing) manufacturing?
A: Cribbing
B: Cutting
C: Smoothing
D: Polishing
*4: For a given lens power which of the following would increase the field of view through a progressive power lens?
A: Use of CNC generator
B: Use of adaptive tool polishing technology
C: Shallower lens form
D: Steeper lens form
*5: Which of the following is a technically inaccurate statement?
A: Latest generation free-form (aka advanced digital surfacing) technology uses adaptive polishing
B: Progressive surfaces can be placed on the front or rear surface of a lens
C: Rear surface progression, progressive power lenses have no unwanted astigmatism
D: The top of the progression zone on a traditional progressive power lens is the area where the unwanted astigmatism is narrowest
*6: Which of the following would increase the distance between the iso cylinder lines on a contour plot?
A: Decreasing near addition
B: Increasing near addition
C: Decreasing the progression length
D: Applying the progression to the rear surface
 *Please confirm that this is the first time you are submittting answers for CET C 9375
Yes
No
This CET has been provided to you free from Essilor Ltd.




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