eLetters

644 e-Letters

  • 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...

    Show More
  • 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...

    Show More
  • 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...

    Show More
  • Comments on 23-gauge versus 20-gauge system for pars plana vitrectomy
    Anshuman Sinha

    Dear editor,

    We read with interest the paper by Wimpissinger et al comparing sutureless 23-gauge system to a standard 20-gauge system for pars plana vitrectomy, in a randomized clinical trial.[1] We aim to highlight a few issues in the design, methodology and analysis.

    The authors have analysed postoperative pain and conjunctival injection as primary outcome measures. The effort by the assessor to elicit a...

    Show More
  • Fast Macular Thickness Versus Radial Lines protocol?
    Pearse A Keane

    I read with interest the recent study by Yi et al.

    A very minor point... were the Stratus OCT images obtained using the "Radial Lines" protocol or the "Fast Macular Thickness" protocol? From Figure 1, I suspect that the higher resolution Radial Lines protocol was used (and not Fast Macular Thickness as described in the manuscript).

    In any event, I commend the authors for a worthwhile addition to the li...

    Show More
  • Spontaneous visual improvement in dominant optic atrophy
    Michael S Lee

    Dear Editor:

    I read with interest the article by Dr. Cohn, et al regarding the natural history of autosomal dominant optic atrophy (DOA). The authors describe an average of 10-year follow up for 69 patients with genetically confirmed DOA. In their study, 6 (9%) patients enjoyed improvement in visual acuity by 2 or more lines.

    I found this surprising, and I wonder if the authors could provide...

    Show More
  • Authors Response
    William H Morgan

    Author’s Response re letter by Nathan M Radcliffe

    Dear Editor,

    We are very interested to read Prof Radcliffe’s data showing a variable IOP rise in different subjects tested with the same goggle design. Their results, like ours,[1] suggest that individual anatomic or physiologic factors are important in determining the IOP rise. Currently, these factors are unknown with significant certainty, however som...

    Show More
  • Swimming goggles and elevated intraocular pressure
    Nathan M Radcliffe

    We would like to congratulate Drs Morgan and colleagues on their recent paper “Wearing swimming goggles can elevate intraocular pressure.” We performed a similar study and presented our data at the Association for Research in Vision and Ophthalmology in 2007. Our findings demonstrated that in healthy participants, IOP measurements taken during goggle wear were significantly higher at both one and five minutes, with an av...

    Show More
  • Authors' Reply
    Balwantray C Chauhan

    Dear Editor

    We thank Dr. Alm for his interest and comment on our paper entitled “Practical recommendations for measuring rates of visual field change in glaucoma.” We agree that the standard error of slope estimates is dependent on the number of examinations and duration of follow-up. However, these two parameters are not interchangeable. As pointed out correctly by Dr. Alm, the same number of examinations ov...

    Show More

Pages