- Email: [email protected]
Author reply
Correspondence Re: Halford et al.: Detailed phenotypic and genotypic characterization of Bietti crystalline dystrophy (Ophthalmology
Pattern ERG is more reliable than multifocal ERG in patients who have difficulty with fixation, and was used to assess macular function in our patients with Bietti disease. These data are presented in the manuscript.
2014;121:1174-84) Dear Editor: In regard to the article by Halford et al1 on Bietti crystalline dystrophy, we have the following comments about electrophysiology. The fullfield electroretinogram (ERG) results in the study showed total or subtotal rod or cone system dysfunction although some were normal. Previous reports have documented declines in a and b peak amplitudes in scotopic flash ERG,2 rod b peak amplitudes,3,4 a and b peak amplitudes in photopic ERG,3 in 30-Hz flicker amplitudes,4 and abnormal S-cone ERG findings.3 Patients with normal ERGs may have abnormal results in focal or multifocal ERG.5 Because Bietti crystalline dystrophy may progress slowly and show various electrophysiologic results, it would be reasonable to use multifocal ERG to assess retinal functions, especially in the early stages when full-field ERG may be normal.
ABDULLAH ILHAN, MD1 UMIT YOLCU, MD2 1
Erzurum Military Hospital, Department of Ophthalmology, Erzurum, Turkey; 2Sarikamis Military Hospital, Department of Ophthalmology, Kars, Turkey Financial Disclosure(s): The authors have no proprietary or commercial interest in any materials discussed in this article. Correspondence: Abdullah Ilhan, MD, Erzurum Maresal Cakmak Military Hospital, Department of Ophthalmology, Turkey. E-mail: [email protected].
References 1. Halford S, Liew G, Mackay DS, et al. Detailed phenotypic and genotypic characterization of Bietti crystalline dystrophy. Ophthalmology 2014;121:1174–84. 2. Weber U, Adler K, Hennekes R. [Crystalline chorioretinopathy with marginal corneal involvement]. Klin Monbl Augenheilkd 1984;185:268–71. 3. Yamamoto S, Kataoka Y, Kamiyama M, Hayasaka S. Nondetectable S-cone electroretinogram in a patient with crystalline retinopathy. Doc Ophthalmol 1995;90:221–7. 4. Wilson DJ, Weleber RG, Klein ML, et al. Bietti’s crystalline dystrophy. A clinicopathologic correlative study. Arch Ophthalmol 1989;107:213–21. 5. Kretschmann U, Usui T, Ruether K, Zrenner E. Electroretinographic campimetry in a patient with crystalline retinopathy. Ger J Ophthalmol 1996;5:399–403.
Author reply Dear Editor: We acknowledge the comments of the writers. The 2 main tests of macular function available in routine electrophysiological testing are the pattern electroretinography (ERG) and the multifocal ERG.
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STEPHANIE HALFORD, PHD1 GERALD LIEW, PHD2,3 DONNA S. MACKAY, PHD3 PANAGIOTIS I. SERGOUNIOTIS, PHD3,4 RICHARD HOLT, DPHIL1 SUZANNE BROADGATE, PHD1 EMANUELA V. VOLPI, PHD5 LOUISE OCAKA, PHD6 ANTHONY G. ROBSON, PHD3,4 GRAHAM E. HOLDER, PHD3,4 ANTHONY T. MOORE, MD3,4 MICHEL MICHAELIDES, MD3,4 ANDREW R. WEBSTER, MD3,4 1 Nuffield Laboratory of Ophthalmology, Nuffield Department of Clinical Neuroscience, University of Oxford, Oxford, UK; 2Centre for Vision Research, Westmead Millennium Institute, University of Sydney, Sydney, Australia; 3Moorfields Eye Hospital, London, UK; 4University College London, Institute of Ophthalmology, Bath Street, London, UK; 5 Molecular Cytogenetics and Microscopy Core, Wellcome Trust Centre for Human Genetics, University of Oxford, Oxford, UK; 6Institute of Child Health, London, UK
Financial Disclosure(s): The authors have no proprietary or commercial interest in any materials discussed in this Letter. Correspondence: Stephanie Halford, PhD, University of Oxford Nuffield, Department of Clinical Neuroscience, Nuffield Laboratory of Ophthalmology, Oxford OX3 9DU United Kingdom. E-mail: [email protected].
Re: Bajric et al.: Patient and physician perceptions of Medicare reimbursement policy for blepharoplasty and blepharoptosis surgery (Ophthalmology 2014;121:1474-9) Dear Editor: We read with special interest the article by Bajric et al1 regarding Medicare reimbursement for eyelid surgery. We previously discussed a surgeon’s preference for the sequence and type of surgeries to perform in a patient with coexisting dermatochalasis and blepharoptosis.2 A survey published in 2011 of members of the American Society of Ophthalmic Plastic and Reconstructive Surgery demonstrated that 74% of respondents performed posteriorapproach ptosis repair.3 We wondered to whether the popularity and apparent reemergence of posterior-approach surgery may be related to the “bundling” of ptosis correction and upper blepharoplasty.2 It may be more acceptable to a patient to undergo 2 operations through different incisions performed at
Pattern ERG is more reliable than multifocal ERG in patients who have difficulty with fixation, and was used to assess macular function in our patients with Bietti disease. These data are presented in the manuscript.
2014;121:1174-84) Dear Editor: In regard to the article by Halford et al1 on Bietti crystalline dystrophy, we have the following comments about electrophysiology. The fullfield electroretinogram (ERG) results in the study showed total or subtotal rod or cone system dysfunction although some were normal. Previous reports have documented declines in a and b peak amplitudes in scotopic flash ERG,2 rod b peak amplitudes,3,4 a and b peak amplitudes in photopic ERG,3 in 30-Hz flicker amplitudes,4 and abnormal S-cone ERG findings.3 Patients with normal ERGs may have abnormal results in focal or multifocal ERG.5 Because Bietti crystalline dystrophy may progress slowly and show various electrophysiologic results, it would be reasonable to use multifocal ERG to assess retinal functions, especially in the early stages when full-field ERG may be normal.
ABDULLAH ILHAN, MD1 UMIT YOLCU, MD2 1
Erzurum Military Hospital, Department of Ophthalmology, Erzurum, Turkey; 2Sarikamis Military Hospital, Department of Ophthalmology, Kars, Turkey Financial Disclosure(s): The authors have no proprietary or commercial interest in any materials discussed in this article. Correspondence: Abdullah Ilhan, MD, Erzurum Maresal Cakmak Military Hospital, Department of Ophthalmology, Turkey. E-mail: [email protected].
References 1. Halford S, Liew G, Mackay DS, et al. Detailed phenotypic and genotypic characterization of Bietti crystalline dystrophy. Ophthalmology 2014;121:1174–84. 2. Weber U, Adler K, Hennekes R. [Crystalline chorioretinopathy with marginal corneal involvement]. Klin Monbl Augenheilkd 1984;185:268–71. 3. Yamamoto S, Kataoka Y, Kamiyama M, Hayasaka S. Nondetectable S-cone electroretinogram in a patient with crystalline retinopathy. Doc Ophthalmol 1995;90:221–7. 4. Wilson DJ, Weleber RG, Klein ML, et al. Bietti’s crystalline dystrophy. A clinicopathologic correlative study. Arch Ophthalmol 1989;107:213–21. 5. Kretschmann U, Usui T, Ruether K, Zrenner E. Electroretinographic campimetry in a patient with crystalline retinopathy. Ger J Ophthalmol 1996;5:399–403.
Author reply Dear Editor: We acknowledge the comments of the writers. The 2 main tests of macular function available in routine electrophysiological testing are the pattern electroretinography (ERG) and the multifocal ERG.
e22
STEPHANIE HALFORD, PHD1 GERALD LIEW, PHD2,3 DONNA S. MACKAY, PHD3 PANAGIOTIS I. SERGOUNIOTIS, PHD3,4 RICHARD HOLT, DPHIL1 SUZANNE BROADGATE, PHD1 EMANUELA V. VOLPI, PHD5 LOUISE OCAKA, PHD6 ANTHONY G. ROBSON, PHD3,4 GRAHAM E. HOLDER, PHD3,4 ANTHONY T. MOORE, MD3,4 MICHEL MICHAELIDES, MD3,4 ANDREW R. WEBSTER, MD3,4 1 Nuffield Laboratory of Ophthalmology, Nuffield Department of Clinical Neuroscience, University of Oxford, Oxford, UK; 2Centre for Vision Research, Westmead Millennium Institute, University of Sydney, Sydney, Australia; 3Moorfields Eye Hospital, London, UK; 4University College London, Institute of Ophthalmology, Bath Street, London, UK; 5 Molecular Cytogenetics and Microscopy Core, Wellcome Trust Centre for Human Genetics, University of Oxford, Oxford, UK; 6Institute of Child Health, London, UK
Financial Disclosure(s): The authors have no proprietary or commercial interest in any materials discussed in this Letter. Correspondence: Stephanie Halford, PhD, University of Oxford Nuffield, Department of Clinical Neuroscience, Nuffield Laboratory of Ophthalmology, Oxford OX3 9DU United Kingdom. E-mail: [email protected].
Re: Bajric et al.: Patient and physician perceptions of Medicare reimbursement policy for blepharoplasty and blepharoptosis surgery (Ophthalmology 2014;121:1474-9) Dear Editor: We read with special interest the article by Bajric et al1 regarding Medicare reimbursement for eyelid surgery. We previously discussed a surgeon’s preference for the sequence and type of surgeries to perform in a patient with coexisting dermatochalasis and blepharoptosis.2 A survey published in 2011 of members of the American Society of Ophthalmic Plastic and Reconstructive Surgery demonstrated that 74% of respondents performed posteriorapproach ptosis repair.3 We wondered to whether the popularity and apparent reemergence of posterior-approach surgery may be related to the “bundling” of ptosis correction and upper blepharoplasty.2 It may be more acceptable to a patient to undergo 2 operations through different incisions performed at