eLetters

568 e-Letters

  • Perception of pain during anaesthesia

    Editor,
    We read with interest the paper by Minasian et al. They quote that pain experienced during an injection is related to the temperature of the injection and the speed of delivery of the solution.[1] [2]

    In their article, they have used all anaesthetics at room temperature. We have been pre-warming our anaesthetic solutions routinely for cataract surgery. We use a heat pad (Dreamland appliance...

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  • Visual field defects after vitrectomy with fluid-air exchange

    Editor,
    The paper by Cullinane and Cleary presents an excellent prospective study of peripheral visual field loss in patients undergoing macular hole surgery. The authors compared vitrectomy with complete posterior cortical vitreous peeling to limited vitrectomy with removal of cortical vitreous off the macula, but not off the optic nerve head or the peripheral retina. The authors showed a statistically...

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  • Mitomyucin C augmented trabeculectomy for post-keratoplasty glaucoma

    Editor,
    We read with interest the article by Ishioka and coworkers, in which the authors studied the effect of trabeculectomy with and without mitomycin C in post-keratoplasty glaucoma. The authors conclude that trabeculectomy with mitomycin C showed better results for glaucoma following penetrating keratoplasty. We congratulate the authors for an excellent study. We have published similar observations on...

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  • Corneal transplantation

    Editor,
    The commentary by Waldock and Cook on the survival rates of corneal grafts highlights a number of issues. In particular, they focus on the lack of long-term follow-up data in the UK. The value of such data is clearly evident from the Australian Corneal Graft Register.[1] Moreover, in the present climate of clinical audit and evidence-based medicine, the collection of such data has surely become a...

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  • 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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