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Photographic Calibration Of Hirschberg Test

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Individual case photogrammetric calibration of the Hirschberg ... - PubMed

    https://pubmed.ncbi.nlm.nih.gov/16457664/#:~:text=Individual%20case%20photogrammetric%20calibration%20of%20the%20Hirschberg%20Ratio,14%20to%2024%20PD%2Fmm%2C%20but%20is%20totally%20unpredictable.
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[PDF] Photographic calibration of the Hirschberg test.

    https://www.semanticscholar.org/paper/Photographic-calibration-of-the-Hirschberg-test.-Brodie/78e7120019bb6e7b41623730b852862cedd30eb6
    A series of direct photographic measurements of corneal reflex positions was taken to reconcile discrepant interpretations of the Hirschberg test, and a value of 21 prism diopters per millimeter was obtained for the conversion factor relating ocular rotations to reflex displacement, valid over a range of 200 prism D.

Photographic calibration of the Hirschberg test

    https://eurekamag.com/research/006/110/006110751.php
    Photographic calibration of the Hirschberg test Brodie, S.E. Investigative Ophthalmology and Visual Science 28(4): 736-742 1987 A series of direct photographic measurements of corneal reflex positions was taken to reconcile discrepant interpretations of the Hirschberg test.

Photographic calibration of the Hirschberg test | Read by QxMD

    https://read.qxmd.com/read/3557878/photographic-calibration-of-the-hirschberg-test
    A series of direct photographic measurements of corneal reflex positions was taken to reconcile discrepant interpretations of the Hirschberg test. A value of 21 prism diopters per millimeter was obtained for the conversion factor relating ocular rotations to reflex displacement, valid over a range of 200 prism D. Quantitative interpretation of routine clinical photographs of strabismic ...

Calibration of Hirschberg test photographs under clinical …

    https://www.ncbi.nlm.nih.gov/pubmed/2771361
    Calibration of Hirschberg test photographs under clinical conditions. DeRespinis PA(1), Naidu E, Brodie SE. Author information: (1)Manhattan Eye, Ear and Throat Hospital, New York, NY 10021. The feasibility of determining the angle of ocular deviation from clinicalphotographs was assessed. Corneal reflex photographs were obtained from 30strabismic patients and 5 …

Calibration of Hirschber Test Photographs under Clinical …

    https://www.sciencedirect.com/science/article/pii/S0161642089327758
    The reflex displacement is 0.5 mm in the right eye, 2.45 mm in the left eye, yielding a net displacement of 1.95 mm. This corresponds to an estimate of 40.95 PD for the magnitude of the esotropia, based on a value of 21 for the Hirschberg coefficient. The deviation measured 45 PD by prism-cover testing. or guardian.

Photographic calibration of the Hirschberg test.

    https://europepmc.org/article/MED/3557878
    A series of direct photographic measurements of corneal reflex positions was taken to reconcile discrepant interpretations of the Hirschberg test.

Photographic calibration of the Hirschberg test - Mendeley

    https://www.mendeley.com/catalogue/8888c0db-5cdd-327e-8c1a-8436e045dd3c/
    (1987) Brodie. Investigative Ophthalmology and Visual Science. A series of direct photographic measurements of corneal reflex positions was taken to reconcile discrepant interpretations of the Hirschberg test. A value of 21 prism diopters per millimeter was obtained for …

Individual case photogrammetric calibration of the …

    https://pubmed.ncbi.nlm.nih.gov/16457664/
    Photo(grammetric) HR calibration in (of) each case facilitates acceptable strabometry precision and accuracy. Method: Take 3 flash photos of the patient with both the preferred eye and then the deviating eye fixating straight ahead and then again with the deviation eye fixing at (+/-5-10 PD) the strabismic angle on a metric rule (stick) one meter away from the camera lens (where 1 cm …

Calibration of the Hirschberg test in human infants

    https://pubmed.ncbi.nlm.nih.gov/8113004/
    Because many structures in the eye are growing during the 1st year, it is possible that there could be some change in the Hirschberg ratio during this period. Methods: A photographic technique was used to calculate the Hirschberg ratio for 323 infants between the ages of 27 and 365 days and for ten adult subjects. The study also measured angle lambda, the angle between the line …

Calibration of Hirschberg test photographs under clinical …

    https://www.semanticscholar.org/paper/Calibration-of-Hirschberg-test-photographs-under-Derespinis-Naidu/a373c220f62eac3829d2e9bbf9541065c99de7b4
    The feasibility of determining the angle of ocular deviation from clinical photographs was assessed and detailed algorithms for the calculation of strabismic angle from photographic data are provided in an appendix. The feasibility of determining the angle of ocular deviation from clinical photographs was assessed. Corneal reflex photographs were obtained from 30 …

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