Manual and software-based measurements of treatment zone parameters and characteristics in children with slow and fast axial elongation in orthokeratology.
axial elongation
myopia control
orthokeratology
treatment zone characteristics
Journal
Ophthalmic & physiological optics : the journal of the British College of Ophthalmic Opticians (Optometrists)
ISSN: 1475-1313
Titre abrégé: Ophthalmic Physiol Opt
Pays: England
ID NLM: 8208839
Informations de publication
Date de publication:
07 2022
07 2022
Historique:
revised:
06
03
2022
received:
01
10
2021
accepted:
06
03
2022
pubmed:
3
4
2022
medline:
9
6
2022
entrez:
2
4
2022
Statut:
ppublish
Résumé
To compare the treatment zone (TZ) measurements obtained using manual and software-based methods in orthokeratology (ortho-k) subjects and explore the TZ characteristics of children with slow and fast axial elongation after ortho-k. Data from 69 subjects (aged 7 to <13 years old), who participated in three 24-month longitudinal orthokeratology studies, showing fast (>0.27 mm, n = 38) and slow (<0.09 mm, n = 31) axial elongation, were retrieved. The TZ after ortho-k was defined as the central flattened area enclosed by points with no refractive power change. TZ parameters, including decentration, size, width of the peripheral steepened zone (PSZ), central and peripheral refractive power changes and peripheral rate of power change, were determined manually and using python-based software. TZ parameters were compared between measurement methods and between groups. Almost all TZ parameters measured manually and with the aid of software were significantly different (p < 0.05). Differences in decentration, size and the PSZ width were not clinically significant, but differences (0.45 to 0.92 D) in refractive power change in the PSZ were significant, although intraclass coefficients (0.95 to 0.98) indicated excellent agreement between methods. Significantly greater TZ decentration, smaller TZ size and greater inferior rate of power change (relative to the TZ centre) were observed in slow progressors using both methods, suggesting a potential role of TZ in regulating myopia progression in ortho-k. TZ measurements using manual and software-based methods differed significantly and cannot be used interchangeably. The combination of TZ decentration, TZ size and peripheral rate of power change may affect myopia control effect in ortho-k.
Types de publication
Journal Article
Research Support, Non-U.S. Gov't
Langues
eng
Sous-ensembles de citation
IM
Pagination
773-785Informations de copyright
© 2022 The Authors Ophthalmic and Physiological Optics © 2022 The College of Optometrists.
Références
Zhou WJ, Zhang YY, Li H, et al. Five-year progression of refractive errors and incidence of myopia in school-aged children in Western China. J Epidemiol. 2016;26:386-95.
Lin L, Shih Y, Hsiao C, Chen C. Prevalence of myopia in Taiwanese schoolchildren: 1983 to 2000. Ann Acad Med. 2004;33:27-33.
Vitale S, Sperduto RD, Ferris FL. Increased prevalence of myopia in the United States between 1971-1972 and 1999-2004. Arch Ophthalmol. 2009;127:1632-9.
Chen M, Wu A, Zhang L, et al. The increasing prevalence of myopia and high myopia among high school students in Fenghua city, eastern China: a 15-year population-based survey. BMC Ophthalmol. 2018;18:159. https://doi.org/10.1186/s12886-018-0829-8
Haarman AE, Enthoven CA, Tideman JWL, Tedja MS, Verhoeven VJ, Klaver CC. The complications of myopia: a review and meta-analysis. Invest Ophthalmol Vis Sci. 2020;61:ARVO E-Abstract 49.
Santodomingo-Rubido J, Villa-Collar C, Gilmartin B, Gutiérrez-Ortega R. Myopia control with orthokeratology contact lenses in Spain: refractive and biometric changes. Invest Ophthalmol Vis Sci. 2012;53:5060-5.
Walline JJ, Walker MK, Mutti DO, et al. Effect of high add power, medium add power, or single-vision contact lenses on myopia progression in children: the BLINK randomized clinical trial. JAMA Ophthalmol. 2020;324:571-80.
Siatkowski RM, Cotter SA, Crockett R, et al. Two-year multicenter, randomized, double-masked, placebo-controlled, parallel safety and efficacy study of 2% pirenzepine ophthalmic gel in children with myopia. J AAPOS. 2008;12:332-9.
Chua WH, Balakrishnan V, Chan YH, et al. Atropine for the treatment of childhood myopia. Ophthalmology. 2006;113:2285-91.
Yam JC, Jiang Y, Tang SM, et al. Low-concentration atropine for myopia progression (LAMP) study: a randomized, double-blinded, placebo-controlled trial of 0.05%, 0.025%, and 0.01% atropine eye drops in myopia control. Ophthalmology. 2019;126:113-24.
Cho P, Cheung SW. Retardation of myopia in orthokeratology (ROMIO) study: a 2-year randomized clinical trial. Invest Ophthalmol Vis Sci. 2012;53:7077-85.
Vincent SJ, Cho P, Chan KY, et al. CLEAR - orthokeratology. Cont Lens Anterior Eye. 2021;44:240-69.
Kang P, Swarbrick H. Peripheral refraction in myopic children wearing orthokeratology and gas-permeable lenses. Optom Vis Sci. 2011;88:476-82.
Charman WN, Mountford J, Atchison DA, Markwell EL. Peripheral refraction in orthokeratology patients. Optom Vis Sci. 2006;83:641-8.
Lau JK, Vincent SJ, Cheung SW, Cho P. Higher-order aberrations and axial elongation in myopic children treated with orthokeratology. Invest Ophthalmol Vis Sci. 2020;61:ARVO E-Abstract 22.
Hiraoka T, Kakita T, Okamoto F, Oshika T. Influence of ocular wavefront aberrations on axial length elongation in myopic children treated with overnight orthokeratology. Ophthalmology. 2015;122:93-100.
Carracedo G, Espinosa-Vidal T, Martínez-Alberquilla I, Batres L. The topographical effect of optical zone diameter in orthokeratology contact lenses in high myopes. J Ophthalmol. 2019;2019:1082472. https://doi.org/10.1155/2019/1082472
Faria-Ribeiro M, Belsue RN, López-Gil N, González-Méijome JM. Morphology, topography, and optics of the orthokeratology cornea. J Biomed Opt. 2016;21:075011. https://doi.org/10.1117/1.JBO.21.7.075011
Lu F, Simpson T, Sorbara L, Fonn D. The relationship between the treatment zone diameter and visual, optical, and subjective performance in corneal refractive therapy lens wearers. Ophthalmic Physiol Opt. 2007;27:568-78.
Zhong Y, Chen Z, Xue F, Zhou J, Niu L, Zhou X. Corneal power change is predictive of myopia progression in orthokeratology. Optom Vis Sci. 2014;91:404-11.
Hiraoka T, Okamoto C, Ishii Y, Kakita T, Oshika T. Contrast sensitivity function and ocular higher-order aberrations following overnight orthokeratology. Invest Ophthalmol Vis Sci. 2007;48:550-6.
Guo B, Cheung SW, Kojima R, Cho P. One-year results of the variation of Orthokeratology lens treatment zone (VOLTZ) study: a prospective randomised clinical trial. Ophthalmic Physiol Opt. 2021;41:702-14.
Pauné J, Fonts S, Rodríguez L, Queirós A. The role of back optic zone diameter in myopia control with orthokeratology lenses. J Clin Med. 2021;10:336. https://doi.org/10.3390/jcm10020336
Wang Q, Savini G, Hoffer KJ, et al. A comprehensive assessment of the precision and agreement of anterior corneal power measurements obtained using 8 different devices. PloS One. 2012;7:e45607. https://doi.org/10.1371/journal.pone.0045607
Wang A, Yang C. Influence of overnight orthokeratology lens treatment zone decentration on myopia progression. J Ophthalmol. 2019;2019:2596953. https://doi.org/10.1155/2019/2596953
Chen R, Chen Y, Lipson M, et al. The effect of treatment zone decentration on myopic progression during or-thokeratology. Curr Eye Res. 2020;45:645-51.
Hu Y, Wen C, Li Z, Zhao W, Ding X, Yang X. Areal summed corneal power shift is an important determinant for axial length elongation in myopic children treated with overnight orthokeratology. Br J Ophthalmol. 2019;103:1571-5.
Gifford P, Tran M, Priestley C, Maseedupally V, Kang P. Reducing treatment zone diameter in orthokeratology and its effect on peripheral ocular refraction. Cont Lens Anterior Eye. 2020;43:54-9.
Maseedupally VK, Gifford P, Lum E, et al. Treatment zone decentration during orthokeratology on eyes with corneal toricity. Optom Vis Sci. 2016;93:1101-11.
Maseedupally VK. Regional corneal topographic responses in overnight orthokeratology and their influence on treatment zone decentration [thesis]. Sydney, NSW: The University of New South Wales Sydney, Australia; 2013.
Mountford J. Corneal and refractive changes due to orthokeratology. In: Benson K, editor. Orthokeratology: principles and practice. London: Butterworth-Heinemann Medical; 2004. p. 175-202.
Chen C, Cheung SW, Cho P. Myopia control using toric orthokeratology (TO-SEE study). Invest Ophthalmol Vis Sci. 2013;54:6510-7.
Wan K, Lau JK, Cheung SW, Cho P. Orthokeratology with increased compression factor (OKIC): study design and preliminary results. BMJ Open Ophthalmol. 2020;5:e000345. https://doi.org/10.1136/bmjophth-2019-000345
Dierckx P. An algorithm for surface-fitting with spline functions. IMA J Numer Anal. 1981;1:267-83.
Halır R, Flusser J. Numerically stable direct least squares fitting of ellipses. In: Skala V, editor. Proceedings of the sixth international conference on computer graphics and visualization (WSCG). Volume 1. Plzen: Vydavatelstvi Zapadoceske University; 1998. p. 125-32.
Tahhan N, Du Toit R, Papas E, Chung H, La Hood D, Holden B. Comparison of reverse-geometry lens designs for overnight orthokeratology. Optom Vis Sci. 2003;80:796-804.
Sridharan R, Swarbrick H. Corneal response to short-term orthokeratology lens wear. Optom Vis Sci. 2003;80:200-6.
Guo B, Lau JK, Cheung SW, Cho P. Repeatability and reproducibility of manual choroidal thickness measurement using Lenstar images in children before and after orthokeratology treatment. Cont Lens Anterior Eye. 2021. https://doi.org/10.1016/j.clae.2021.101484