eLetters

634 e-Letters

  • Sequelae of diabetic vitrectomy

    Editor,
    The work of West and Gregor again points out the importance of sclerotomy complications following pars plana vitrectomy. They demonstrate that, even in the hands of a skillful and experienced surgeon, vitreous hemorrhage after vitrectomy for diabetic retinopathy is common and requires vitreous cavity washout (VCWO) in 12% of cases. In their series, over half of the eyes had detectable fibrovascular...

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  • Beta irradiation in pterygium surgery

    Editor
    We read with interest the study that compared intraoperative mitomycin C to beta irradiation in primary pterygium surgery.

    The authors rightly commented that long term complications of beta-irradiation, such as scleral necrosis, may arise more than 10 years after the irradiation. Longer follow-ups are necessary to reveal such complications.

    We performed primary pterygium excision...

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  • Viagra and branch retinal artery occlusion: a stiff response

    Editor,
    I was interested to read the case report of branch retinal artery occlusion (BRAO) in a 69 year old male that was presumed to have been caused by sildenafil.

    In addition to transient cardiac arrhythmia, the authors speculate that the underlying mechanism of arterial occlusion may have been a sudden rise in intra-ocular pressure caused by Viagra. They do not mention whether the arteri...

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  • Potential complications

    Editor,
    Could you please provide a reference for Bell's phenomenon and the occurrence of optical zone intrusion as well as the ability to control spontaneous eye movements during the procedure?

  • Visual acuity and contrast sensitivity

    Editor,
    I am a 76-year-old suffering from myopic degeneration (is this ARMD?).I have been operated for cataract on my left eye with no significant improvement. I am strongly convinced that the usual measurement of visual acuity is almost meaningless. The major problem I find in practical life is the lack of adequate sensitivity to contrast. For example, in my bank they print their copy report with a gray ink...

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  • Mitomycin C for external DCR

    Editor,
    I read the paper by Liao et al with interest. It is indeed one of the biggest studies of mitomycin C in external DCR. I have few queries about how mitomycin C was applied. Firstly, where should the pledget of mitomycin C be placed if the posterior flaps of the nasal mucosa and the sac are not sutured? My practice is to take a U-shaped flap of both the nasal mucosa and the lacrimal sac. Second...

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  • Prevention of visual field defects after macular hole surgery

    Editor,
    We read with interest the article by Culliance and Cleary on the method of prevention of visual field defects after macular hole surgery. In their series, one group of 82 eyes received conventional pars plana vitrectomy surgery with mechanical induction of posterior vitreous detachment (PVD) around the optic disc followed by complete posterior cortical vitreous removal. Twenty-two percent of these...

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  • Relevance of angle closure in Asians

    Editor,
    In their article Foster et al have addressed an issue of relevance to developing countries that have a high prevalence of angle closure. The likelihood ratio of a positive test using results that we have reported (sensitivity 61.9% and specificity 89.3%) is approximately 6 which is similar to the LR for the authors' 15% cutoff. Invocation of pupillary block to explain the discrepancy seems r...

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  • Susceptibility to ocular autoimmune disease

    Editor,
    We read with interest the Newsdesk piece in the March 2000 issue of the journal, commenting on recent studies indicating a conceptual shift in the understanding of the molecular basis of differential susceptibility to organ-specific autoimmune diseases. However, we were disappointed that the Newsdesk piece was restricted to studies of the animal model of multiple sclerosis and not that of uveitis....

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  • Changing thresholds for cataract surgery

    Editor,
    We congratulate Hugh Taylor on his editorial in which he discusses the volume of cataract surgery which needs to be done. We were particularly interested by his calculations drawing attention to the effect of changing the visual threshold at which the decision to undertake cataract surgery is made.

    We have reviewed a series of eight audits of cataract surgery to determine the visual acuities a...

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