eLetters

83 e-Letters

published between 1999 and 2002

  • Re: Surgery for glaucoma in the 21st century
    Andre Mermoud

    Dear Editor

    Regarding the editorial by Khaw et al.[1] we are surprised that after quite a few years now non- penetrating filtering surgery (NPFS) remains only partly understood by many ophthalmologists. There are at present two main NPFS: viscocanalostomy as described by Stegmann, in which outflow filtration is at least in theory not subconjunctival, and deep sclerectomy with or without an implant or even wi...

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  • Disinfecting solutions: Authors' reply
    Horst Aspöck

    Dear Dr Pinna,

    Thank you very much for your response to our article on Acanthamoeba and contact lens disinfecting solutions. You are absolutely right, indeed, standard methods for testing of anti-Acanthamoeba effectivity of biocides are urgently needed. However, as such standards are not yet available, we used three different concentrations of amoebae, namely 103, 104, and 105 per ml (as stated in the Materials...

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  • Acanthamoeba and disinfecting contact lens solutions
    Antonio Pinna

    Dear Editor

    I read with interest the article by Hiti et al.[1] on the susceptibility of Acanthamoeba to a multipurpose disinfecting contact lens solution and two hydrogen peroxide systems. The association between acanthamoeba keratitis and contact lens wear is now firmly established. Thus, the use of contact lens disinfecting solutions effective at killing Acanthamoeba organisms is important in pr...

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  • Complete amblyopia information for patients
    Philip Lempert

    Dear Editor

    Dr Newsham's effort to inform parents of children with amblyopia about occlusion therapy is laudable but incomplete. Ethical considerations of informed consent require full disclosure of all aspect of the proposed treatment. In the current instance this compels inclusion of the following points:

    1. Occlusion therapy has never been scientifically validated with a randomized, controlled study.

    ...
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  • Role of autologous serum in persistent epithelial defects
    Rasik B Vajpayee

    Dear Editor

    Poon et al.[1] in their excellent article have reiterated the efficacy of autologous serum in the treatment of persistent epithelial defects (PEDs) of the cornea. We would like to invite the attention of the authors to certain aspects of the study. The authors have considered a period of one week for labeling an epithelial defect to be persistent. However, most studies on a similar subject have tak...

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  • Autologous serum in epithelial defects: Authors' reply
    John Dart

    Dear Editor

    Vajpayee and colleagues have criticised several aspects of our study and justified their views with unrepresentative quotations from the literature.

    Choice of time period before an epithelial defect can be described as "persistent".
    There is no accepted definition of persistent epithelial defect (PED) that includes a time period. We favour the definition given in one text"......

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  • Analysis of astigmatism correction: Authors' reply
    Nigel Morlet

    Dear Editor

    Thank you for the opportunity to reply to the letter from Dr Alpins concerning our recent article "Astigmatism and the analysis of its surgical correction".[1] Noel Alpins is a widely respected contributor to many international meetings, having written comprehensively on the use of astigmatism vector analysis. His software program ASSORT TM is widely used for the planning of refractive surgery a...

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  • Cell death assays for endothelial viability in corneal donor tissue
    Jonathan Guy Crowston

    Dear Editor

    We read with interest the paper by Gain et al. [1] which assessed two distinct techniques to quantify corneal endothelial cell death in donor corneas. A significantly higher rate of cell death was observed with the TUNEL assay which labels nuclei with fragmented DNA, compared to the trypan blue exclusion method, which detects cells with disrupted cell membranes. The authors conclude that...

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  • A perspective on bovine pericardium for orbital implants
    Mandeep S Bajaj

    Dear Editor

    We have read with avid interest the article by Gupta et al. on the use of bovine pericardium as a wrapping material for hydroxyapatite orbital implants.[1] We are highly impressed by their results as none of the patients had implant extrusion. This is really commendable since implant extrusion rate has ranged from 9 % to 21 % in previous studies,[2] and it indicates meticulous technique and follow up....

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  • Axial length in silicone oil filled eyes
    Lalit Verma

    Dear Editor

    We read with great interest the article by Takei et al..[1] We agree with the authors that axial length (AL) measurement in silicone oil-filled eyes is a difficult situation. The need for accurate estimation of AL has increased following advances in vitreoretinal surgical techniques and improved visual results. We complement Takei and colleagues for an excellent report on the matter. CT scanning for...

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