ABO Review Quiz – Lens Form OpenOptix ABO Study Guide: Chapter 3 31 Questions

Question #5 is incomplete.

What is the best base curve for a +2.50D lens? Shouldn’t that be 8.5 not 8? If you add 6 to the sphere power.

Can anyone explain the simple way of understanding how to determine the effective powers at any meridian and a cylinder power. I DO NOT KNOW THE STEPS IF THERE IS. I am taking the ABO Exam this May 20,2012. GOD HELP ME!

Take a look here: http://www.laramyk.com/resources/education/lens-form-and-theory/lens-form-sphere-cylinder-and-axis/

Q5 is incompleate… the q is The reason for using a “best form” lens is to minimize _________.

Thanks Lisa! It’s now fixed.

To k13, if you do cross cilinder you get (-1.00 x 180) (-2.50 x 90). Why is the answer -2.50?

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Question #5 is incomplete.

What is the best base curve for a +2.50D lens?

Shouldn’t that be 8.5 not 8? If you add 6 to the sphere power.

Can anyone explain the simple way of understanding how to determine the effective powers at any meridian and a cylinder power. I DO NOT KNOW THE STEPS IF THERE IS. I am taking the ABO Exam this May 20,2012. GOD HELP ME!

Take a look here: http://www.laramyk.com/resources/education/lens-form-and-theory/lens-form-sphere-cylinder-and-axis/

Q5 is incompleate… the q is The reason for using a “best form” lens is to minimize _________.

Thanks Lisa! It’s now fixed.

To k13, if you do cross cilinder you get (-1.00 x 180) (-2.50 x 90). Why is the answer -2.50?