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Thread: Help with measurements

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    Help with measurements

    Hi, I am a new optician and have a question. I was using the pupilometer to take a persons PD and they were apparently seeing two dots, so what I did was i moved the knob on the pupilometer from the infinite sign to 100, when I did that he said he saw it better and only saw one dot. So what I want to know, is that, is this is correct or should I have just left it on the infinity section and gotten him to focus on one of the dots? Thank you for any information you are able to provide.

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    Compulsive Truthteller OptiBoard Gold Supporter Uncle Fester's Avatar
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    Those numbers are the setting focal length in centimeters.

    Beyond 10 feet leave it at infinity- 40 for 14 inches the other numbers for in between.

    My pupilometer is a single green lighted circle. Not sure why the patient got 2 "dots".

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    When I said dots I meant green circle. But the problem is when he is focusing on the green circle he said that he is seeing 2 of them and that he doesn't know which one to focus on. But when I moved the knob to 100 he saw it more crisp and he saw 1 circle instead of 2. So what I'm mainly confused about is if I leave it at infinity will the measurements be right?

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    Master OptiBoarder optical24/7's Avatar
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    It sounds like the patient is diplopic. Does the patient have prism prescribed? Use the occluder switch on the top of your pupilometer and measure each eye, one at a time.

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    He doesn't have prism prescribed. But I will try to retake the measurements one at a time. Thank you for the advice.

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    Quote Originally Posted by Zmzj01 View Post
    He doesn't have prism prescribed. But I will try to retake the measurements one at a time. Thank you for the advice.
    And confirm by taking a near PD using pupilometer set at 40 cm, and then add 3-4 mm for distance PD.

  7. #7
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    do you have an occluder in your pupilometer? it's a flipper that covers one eye at a time. If the patient still see's 2 images when doing that then it's time to go back to the doctor immediately.

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