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The Role of Back Optic Zone Diameter in Myopia Control with Orthokeratology Lenses

We compared the efficacy of controlling the annual increase in axial length (AL) in myopic Caucasian children based on two parameters: the back optic zone diameter (BOZD) of the orthokeratology (OK) lens and plus power ring diameter (PPRD) or mid-peripheral annular ring of corneal steepening. Data f...

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Autores principales: Pauné, Jaume, Fonts, Silvia, Rodríguez, Lina, Queirós, Antonio
Formato: Online Artículo Texto
Lenguaje:English
Publicado: MDPI 2021
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7831104/
https://www.ncbi.nlm.nih.gov/pubmed/33477514
http://dx.doi.org/10.3390/jcm10020336
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author Pauné, Jaume
Fonts, Silvia
Rodríguez, Lina
Queirós, Antonio
author_facet Pauné, Jaume
Fonts, Silvia
Rodríguez, Lina
Queirós, Antonio
author_sort Pauné, Jaume
collection PubMed
description We compared the efficacy of controlling the annual increase in axial length (AL) in myopic Caucasian children based on two parameters: the back optic zone diameter (BOZD) of the orthokeratology (OK) lens and plus power ring diameter (PPRD) or mid-peripheral annular ring of corneal steepening. Data from 71 myopic patients (mean age, 13.34 ± 1.38 years; range, 10–15 years; 64% male) corrected with different BOZD OK lenses (DRL, Precilens) were collected retrospectively from a Spanish optometric clinic. The sample was divided into groups with BOZDs above or below 5.00 mm and the induced PPRD above or below 4.5 mm, and the relation to AL and refractive progression at 12 months was analyzed. Three subgroups were analyzed, i.e., plus power ring (PPR) inside, outside, or matching the pupil. The mean baseline myopia was −3.11 ± 1.46 D and the AL 24.65 ± 0.88 mm. Significant (p < 0.001) differences were found after 12 months of treatment in the refractive error and AL for the BOZD and PPRD. AL changes in subjects with smaller BOZDs decreased significantly regarding larger diameters (0.09 ± 0.12 and 0.15 ± 0.11 mm, respectively); in subjects with a horizontal sector of PPRD falling inside the pupil, the AL increased less (p = 0.035) than matching or outside the pupil groups by 0.04 ± 0.10 mm, 0.10 ± 0.11 mm, and 0.17 ± 0.12 mm, respectively. This means a 76% lesser AL growth or 0.13 mm/year in absolute reduction. OK corneal parameters can be modified by changing the OK lens designs, which affects myopia progression and AL elongation. Smaller BOZD induces a reduced PPRDs that slows AL elongation better than standard OK lenses. Further investigations should elucidate the effect of pupillary diameter, PPRD, and power change on myopia control.
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spelling pubmed-78311042021-01-26 The Role of Back Optic Zone Diameter in Myopia Control with Orthokeratology Lenses Pauné, Jaume Fonts, Silvia Rodríguez, Lina Queirós, Antonio J Clin Med Article We compared the efficacy of controlling the annual increase in axial length (AL) in myopic Caucasian children based on two parameters: the back optic zone diameter (BOZD) of the orthokeratology (OK) lens and plus power ring diameter (PPRD) or mid-peripheral annular ring of corneal steepening. Data from 71 myopic patients (mean age, 13.34 ± 1.38 years; range, 10–15 years; 64% male) corrected with different BOZD OK lenses (DRL, Precilens) were collected retrospectively from a Spanish optometric clinic. The sample was divided into groups with BOZDs above or below 5.00 mm and the induced PPRD above or below 4.5 mm, and the relation to AL and refractive progression at 12 months was analyzed. Three subgroups were analyzed, i.e., plus power ring (PPR) inside, outside, or matching the pupil. The mean baseline myopia was −3.11 ± 1.46 D and the AL 24.65 ± 0.88 mm. Significant (p < 0.001) differences were found after 12 months of treatment in the refractive error and AL for the BOZD and PPRD. AL changes in subjects with smaller BOZDs decreased significantly regarding larger diameters (0.09 ± 0.12 and 0.15 ± 0.11 mm, respectively); in subjects with a horizontal sector of PPRD falling inside the pupil, the AL increased less (p = 0.035) than matching or outside the pupil groups by 0.04 ± 0.10 mm, 0.10 ± 0.11 mm, and 0.17 ± 0.12 mm, respectively. This means a 76% lesser AL growth or 0.13 mm/year in absolute reduction. OK corneal parameters can be modified by changing the OK lens designs, which affects myopia progression and AL elongation. Smaller BOZD induces a reduced PPRDs that slows AL elongation better than standard OK lenses. Further investigations should elucidate the effect of pupillary diameter, PPRD, and power change on myopia control. MDPI 2021-01-18 /pmc/articles/PMC7831104/ /pubmed/33477514 http://dx.doi.org/10.3390/jcm10020336 Text en © 2021 by the authors. Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (http://creativecommons.org/licenses/by/4.0/).
spellingShingle Article
Pauné, Jaume
Fonts, Silvia
Rodríguez, Lina
Queirós, Antonio
The Role of Back Optic Zone Diameter in Myopia Control with Orthokeratology Lenses
title The Role of Back Optic Zone Diameter in Myopia Control with Orthokeratology Lenses
title_full The Role of Back Optic Zone Diameter in Myopia Control with Orthokeratology Lenses
title_fullStr The Role of Back Optic Zone Diameter in Myopia Control with Orthokeratology Lenses
title_full_unstemmed The Role of Back Optic Zone Diameter in Myopia Control with Orthokeratology Lenses
title_short The Role of Back Optic Zone Diameter in Myopia Control with Orthokeratology Lenses
title_sort role of back optic zone diameter in myopia control with orthokeratology lenses
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7831104/
https://www.ncbi.nlm.nih.gov/pubmed/33477514
http://dx.doi.org/10.3390/jcm10020336
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