eLetters

54 e-Letters

published between 2009 and 2012

  • Author's reply: Vision screening in children by Plusoptix Vision Screener
    Anthony J Vivian

    Dear Editor,

    We thank Dr Arnolds and Ms Matta for their letter regarding our article Vision screening in children by Plusoptix Vision ScreenerTM compared with gold standard orthoptic assessment Dahlmann-Noor et al. (19 November 2008). We agree that a child vision screening tool that could be used effectively with minimal input from healthcare personnel would be desirable. This, together with the National Screenin...

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  • Plus lenses?
    Bernard L Cohen

    Dear Editor

    Out of ignorance, I am surprised that the lenses in a stereoscope should be described as "plus" lenses. They may be so, but I would have expected the more important property to be prism, to aid superimposition of the paired images.

    Please clarify the optics involved.

    BLC

  • Authors' Response
    Susanne Binder

    Dear editor,

    We would like to give a response to the letter of Dr. Anshuman Sinha concerning our article "23 Gauge versus 20 Gauge System for Pars Plana Vitrectomy: A Prospective Randomized Clinical Trial".

    For analysis of postoperative pain we used a simplified verbal rating scale (ranging from 0, meaning no pain, to 3, meaning severe pain). The standardized verbal rating scale reaches from 0 (no pain) to...

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  • Vision screening in children by Plusoptix Vision ScreenerTM compared with gold standard orthoptic as
    Robert W Arnold

    American pediatricians, armed with a new reimbursement code for photoscreening young children (99174), are very interested in the validity of potential instruments.  As such, we were interested in the recent report that compared Plusoptix photoscreener to orthoptic exam in early primary school children, reporting 100% specificity but relatively low sensitivity: “the sensitivity of the PVS to detect amblyopia-associated f...

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