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JCAHPO CCOA (CCOA) Practice Tests & Test Prep by Exam Edge - Review



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JCAHPO Corporate Certified Ophthalmic Assistant - Reviews


   Excellent
Based on 200 reviews

Jonathan


"Your prep tests helped me pass the COA test. Amazingly similar to the real thing. "

Karolina


"HI I happy to say i passed my test for the first time after i was studying and practice on those tests. Now i would like to continue to study and practicing for COT program. thank you very much. Best regards"

Andrew


"Thank you so much Exam Edge! I had been stressing over the notion of taking the Certified Ophthalmic Technician exam for months. A colleague recommended your services, and I could not be happier. I studied primarily using seven practice tests purchased from you, and today, I passed the C.O.T on my first attempt! The material very closely resembles the actual exam material, and I felt confident going into it, after my prep with Exam Edge. Thank you so much!!"

Steve


"Your tests helped me pass the COA exam. I bought the 15 test package and I would study based of those questions. To be honest, questions from this review are a little harder than the real COA exam. Thanks for these exam packages, well put together. "



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See why our users from 154 countries love us for their exam prep! Including 200 reviews for the JCAHPO CCOA exam.

Exam Edge is an industry leader in online test prep. We work with institutional partners to offer a wide array of practice tests that will help you prepare for your big exam. No matter how niche your field of interest might be, we're here to help you prepare for test day.

   Excellent -- Based on 200 reviews

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JCAHPO Corporate Certified Ophthalmic Assistant - Test Reviews Sample Questions

Transpose -0.75 + 4.25 x 001

Correct Answer:
+ 3.50 - 4.25 x 091
the text you've provided appears to involve a sequence of steps related to the transposition of an eyeglass prescription. this process involves converting a prescription from one form (plus cylinder) to another (minus cylinder), or vice versa, as well as making adjustments to the axis of the cylindrical component of the prescription. let's break down the steps and clarify the changes being made to the prescription values.

**initial prescription**: -0.75 + 4.25 x 001 - here, "-0.75" represents the spherical component of the prescription. - "+ 4.25 x 001" represents the cylindrical component and its axis. the axis "001" in eyeglass prescriptions indicates the orientation of the cylinder.

**first change**: + 0.75 - 4.25 x 091 - the spherical sign is changed from negative to positive, and the cylinder's sign is reversed from positive to negative, which is a standard approach in transposing prescriptions. - the axis is adjusted from 001 to 091. this is done by adding 90 degrees to the initial axis, a common practice in transposition when flipping the cylinder sign.

**subsequent adjustments**: + 3.50 - 4.25 x 091 - here, an additional spherical adjustment is made (+3.50), but this part isn't fully explained in the text. typically, adjustments to the sphere are made to maintain the same corrective power after changing the cylinder's orientation and sign.

**repeating adjustments**: - the process seems to repeat with similar steps as above. the spherical and cylindrical values are modified, the cylindrical sign is again flipped, and the axis is adjusted by 90 degrees. this repetition might indicate either multiple scenarios being calculated or a demonstration of the process with varying initial conditions.

**final step**: algebraically add sphere and cylinder - this part of the process involves combining the spherical and cylindrical components to produce a final prescription value. the algebraic addition might refer to accounting for the effect of the cylinder's power when added to the sphere at the specified axis.

**explanation of terms**: - **sphere**: this indicates the power of the lens in diopters needed to correct nearsightedness or farsightedness. - **cylinder**: this represents the power for astigmatism correction and is always coupled with an axis. - **axis**: this is a number from 1 to 180 indicating the orientation of the astigmatism correction in degrees.

overall, the process described involves converting a prescription's format and adjusting its values to fit a different standard or correct for specific visual requirements. this is common when prescriptions are used by different manufacturers, or in different countries, that may use different standards for describing lens powers.