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Espíndola RF, et al. 10. Artal P, Berrio E, Guirao A, Piers P. Contribution of the cornea and internal surfaces to the change of ocular aberrations with age. J Opt Soc Am A Opt Image Sci Vis. 2002; 19(1):137-43. 11. Kara-Junior N, Santhiago MR. Lentes asféricas: avaliação da indicação clínica e das opções de lentes. Rev Bras Oftalmol. 2009;68(4):195-6. 12. Santhiago MR, Netto MV, Barreto J Jr, Gomes BA, Mukai A, Guermandi AP, et al. Wavefront analysis, contrast sensitivity, and depth of focus after cataract surgery with aspherical intraocular lens implantation. Am J Ophtalmol. 2010;149(3):383-9. 13. Caporossi A, Casprini F, Tosi GM, Baiocchi S. Preliminary results of cataract extraction with implantation of a single-piece AcrySof intraocular lens. J Cataract Refract Surg. 2002;28(4):652-5. 14. Kim YY, Kim JS, Shin DH, Kim C, Jung HR. Effect of cataract extraction on blue-on-yellow visual field. Am J Ophthalmol. 2001;132(2):217-20. 15. Kook MS, Yang SJ, Kim S, Chung J, Kim ST, Tchah H. Effect of cataract extraction on frequency doubling technology perimetry. Am J Ophthalmol. 2004;138(1):85-90. 16. Moss ID, Wild JM, Whitaker DJ. The influence of age-related cataract on blue-on-yellow perimetry. Invest Ophthalmol Vis Sci. 1995;36(5):764-73. 17. Henderson BA, Grimes KJ. Blue-blocking IOLs: a complete review of the literature. Surv Ophthalmol. 2010;55(3):284-9. 18. Cuthbertson FM, Peirson SN, Wulff K, Foster RG, Downes SM. Blue light-filtering intraocular lenses: review of potential benefits and side effects. J Cataract Refract Surg. 2009;35(7): 1281-97. Comment in: J Cataract Refract Surg. 2009;35(11):2032; author reply 2032. 19. Mainster MA. Violet and blue light blocking intraocular lenses: photoprotection versus photoreception. Br J Ophthalmol. 2006;90(6):784-92. 20. Rodríguez-Galietero A, Montés-Micó R, Muñoz G, Albarrán-Diego C. Comparison of contrast sensitivity and color discrimination after clear and yellow intraocular lens implantation. J Cataract Refract Surg. 2005;31(9):1736-40. 21. Rodríguez-Galietero A, Montés-Micó R, Muñoz G, Albarrán-Diego C. Blue-light filtering intraocular lens in patients with diabetes: contrast sensitivity and chromatic discrimination. J Cataract Refract Surg. 2005;31(11):2088-92. 22. Hayashi K, Hayashi H. Visual function in patients with yellow tinted intraocular lenses compared with vision in patients with non-tinted intraocular lenses. Br J Ophthalmol. 2006;90(8):1019-23. 23. Castro LC, Souza CE, Soriano ES, Melo LA Jr, Paranhos A Jr. Influence of blue light spectrum filter on short-wavelength and standard automated perimetries. Arq Bras Oftalmol. 2006;69(5):725-9. 24. Jang SY, Ohn YH, Kim SW. Effect of yellow-tinted intraocular lenses on short-wavelength automated perimetry. Am J Ophthalmol. 2010;150(2):243-7. Comment in: Am J Ophthalmol. 2011;15(2):380; author reply 380-1. 25. Kara-Júnior N, Jardim JL, de Oliveira Leme E, Dall’Col M, Susanna R Jr. Effect of the AcrySof Natural intraocular lens on blue-yellow perimetry. J Cataract Refract Surg. 2006;32(8):1328-30. 26. Ueda T, Ota T, Yukawa E, Hara Y. Frequency doubling technology perimetry after clear and yellow intraocular lens implantation. Am J Ophthalmol. 2006;142(5):856-8. 27. Yuan Z, Reinach P, Yuan J. Contrast sensitivity and color vision with a yellow intraocular lens. Am J Ophthalmol. 2004;138(1):138-40. 28. Rodriguez-Galietero A, Montes-Mico R, Munoz G, Albarrán-Diego C. Blue-light filtering intraocular lens in patients with diabetes: contrast sensitivity and chromatic discrimination. J Cataract Refract Surg. 2005;31(11):2088-92. 29. Mainster M, Sparrow. How much blue-light should an IOL transmit? Br J Ophthalmol. 2003;87(12):1523-9. Comment in: Br J Ophthalmol. 2004;88(10):1353; author reply 1353. 30. Pierre A, Wittich W, Faubert J, Overbury O. Luminance contrast with clear and yellowtin ted intraocular lenses. J Cataract Refract Surg. 2007;33(7):1248-52. 31. Landers J, Tan TH, Yen J, Liu H. Comparison of visual function following implantation of Acrisof Natural intraocular lenses with conventional intraocular lenses. Clin Experiment Ophthalmol. 2007;35(2):152-9. 32. Cionni RJ, Tasi JH. Color perception with AcriSof natural and AcriSof single-piece intraocular lenses under photopic and mesopic conditions. J Cataract Refract Surg. 2006;32(2):236-42. XIX Congresso Norte-Nordeste de Oftalmologia 21 a 23 de março de 2013 Enotel Resort & SPA Porto de Galinhas Ipojuca (PE) Informações: Tel.: (81) 3033-5147 E-mail: secretaria.cnne2013@snno.com.br Site: www.snno.com.br Arq Bras Oftalmol. 2012;75(5):316-9 319
Artigo Original | Original Article Reproducibility of peripapillary retinal nerve fiber layer thickness measurements using Spectral Domain OCT in Brazilian patients Reprodutibilidade da espessura da camada de fibras nervosas da retina utilizando-se o Spectral Domain OCT em pacientes brasileiros Daniela Araújo Toscano 1 , Marcos Pereira de Ávila 2 , Maria Regina Catai Chalita 1 ABSTRACT Purpose: To evaluate the reproducibility of peripapillary retinal nerve fiber layer (RNFL) thickness measurements in normal eyes and eyes with glaucoma using spectral domain optical coherence tomography (SDOCT). Methods: One eye of 79 normal and 72 glaucoma patients was analyzed. All patients underwent a complete ophthalmological examination, including visual acuity testing; intraocular pressure, slit-lamp examination, indirect ophthalmoscopy; and the glaucoma group underwent achromatic perimetry with the 24-2 SITA Fast Humphrey Field Analyzer. All patients’ eyes were scanned using the spectral domain optical coherence tomography - Spectralis ® and one of them was cho sen randomly. Three con secutive circular B-scan centered at the optic disc were performed in one visit. Results: The intraclass correlation coefficient (ICC), coefficient of variation and test-retest variability for the mean retinal nerve fiber layer thickness were respectively: 0.94, 2.56% and 4.85 µm for the normal group and 0.93, 4.65% and 6.61 µm for the glaucomatous group. The intraclass correlation coefficient for retinal nerve fiber layer thickness in all quadrants were all excellent in both groups, with the superior quadrant having the highest ICCs (0.964) in glaucomatous eyes and nasal quadrant measurements having the lowest (0.800), but still excellent in eyes without glaucoma. The coefficient of variation was between 2.56% - 8.74% and between 4.65% - 11.44% in normal and glaucomatous group respectively. The test-retest variability was between 4.85 µm and 11.51 µm in the normal group and between 6.61 µm and 14.24 µm in the glaucomatous group. The measurements in glaucomatous eyes were more variable than normal eyes. Conclusions: Spectral domain optical coherence tomography showed excellent reproducibility with regard to retinal nerve fiber layer thickness measurements in normal and glaucomatous eyes. Keywords: Diagnostic techniques, ophthalmological; Glaucoma/diagnosis; Tomography, optical coherence/methods; Retinal ganglion cells; Optic nerve/pathology; Nerve fibers; Reproducibility of results RESUMO Objetivo: Avaliar a reprodutibilidade da medida da espessura da camada de fibras nervosas da retina (CFNR) em olhos sem e com glaucoma utilizando-se tomografia de coerência óptica de domínio espectral (spectral domain OCT - SDOCT). Métodos: Foram analisados apenas um olho de 79 pacientes normais e 72 com glaucoma. Todos os pacientes realizaram um exame oftalmológico completo, incluindo acuidade visual, pressão intraocular, biomicroscopia, oftalmoscopia indireta e, para o grupo com glaucoma, perimetria acromática 24-2 SITA Fast Humphrey Field Ana ly zer. Foram realizados em todos os olhos e em apenas uma visita, três B-scans circulares centrados no disco óptico utilizando-se o SDOCT - Spectralis ® . Resultados: O coeficiente de correlação intraclasse (ICC), coeficiente de variação e va - riabilidade teste-reteste para a média de espessura da camada de fibras nervosas da retina foram respectivamente: 0,94, 2,56% e 4,85 µm para o grupo sem glaucoma e 0,93, 4,65% e 6,61 µm para o grupo glaucomatoso. O coeficiente de correlação intraclasse foi excelente em ambos os grupos em todos os quadrantes, com o quadrante superior sendo o maior (0,964) no grupo glaucomatoso e o nasal sendo o menor (0,800), mas ainda excelente, em olhos sem glaucoma. O coeficiente de variação foi entre 2,56% - 8,74% e entre 4,65% - 11,44%, nos grupos sem e com glaucoma, respectivamente. A variabilidade teste-reteste variou de 4,85 µm e 11,51 µm no grupo sem glaucoma; e entre 6,61 µm e 14.24 µm no com glaucoma. Olhos com glaucoma apresentaram-se mais variáveis que os sem glaucoma. Conclusão: A tomografia de coerência óptica “spectral domain” apresentou excelente reprodutibilidade da espessura da camada de fibras nervosas da retina em pacientes sem e com glaucoma. Descritores: Técnicas de diagnóstico oftalmológico; Glaucoma/diagnostico; Tomografia de coerência óptica/métodos; Células ganglionares da retina; Nervo óptico/patologia; Fibras nervosas; Reprodutibilidade dos testes INTRODUCTION Glaucoma is an optic neuropathy, multifactorial, characterized by accelerated death of the retinal ganglion cells, subsequent axonal loss, and visual field impairment (1) . Detected defects in the retinal nerve fiber layer (RNFL) years before arising alterations in the visual field suggests that anatomical alterations of the RNFL can identify progression of the glaucoma before it causes functional loss in the visual field (2) . Methods for reliably establishing glaucomatous nerve atrophy are limited. Optical coherence tomography (OCT) is a noninvasive, high-resolution imaging technique that allows in vivo measurements of RNFL in cross section. High-resolution imaging of retinal structure is clinically relevant for the diagnosis of glaucoma (3) . Until recently, the OCT commercially available was the time domain OCT (TDOCT), which provides an axial resolution of 10 μm, and cross sectional retinal images consisting of 512 A-scans can be acquired Submitted for publication: October 4, 2011 Accepted for publication: August 31, 2012 Study carried out at Department of Ophthalmology, Universidade de Brasília - UnB. 1 Physician, Department of Ophthalmology, Universidade de Brasília - UnB - Brasília (DF), Brazil. 2 Professor, Department of Ophthalmology, Universidade Federal de Goiás - UFG - Goiânia (GO), Brazil. Funding: No specific financial support was available for this study. Disclosure of potential conflicts of interest: D.A.Toscano, None; M.P.Ávila, None; M.R.C.Chalita, None. Correspondence address: Daniela Araújo Toscano. Av. Ingá, 250, Apto. 302 - João Pessoa (PB) 58038-250 - Brazil - E-mail: danielaatoscano@gmail.com The study was approved by the Institutional Review Board / Ethics Committee of the University of Brasília (DF) Brazil (CEP-FM 057/2010). 320 Arq Bras Oftalmol. 2012;75(5):320-3
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