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Orthokeratology

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https://www.readbyqxmd.com/read/29098084/influence-of-overnight-orthokeratology-on-corneal-surface-shape-and-optical-quality
#1
Yuan Sun, Lin Wang, Jing Gao, Mei Yang, Qi Zhao
Purpose: To investigate the changes of corneal surface shape and optical quality during orthokeratology. Methods: 49 eyes of 26 patients (10.63 ± 2.02 years old) who underwent overnight orthokeratology for myopia were prospectively examined. The corneal surface shape parameters, including surface regularity index (SRI) and surface asymmetry index (SAI), were attained with an OPD-III SCAN. The higher-order aberrations and higher-order Strehl ratios were calculated under a 3 mm pupil diameter before orthokeratology, 1 month, 3 months, and 6 months after orthokeratology...
2017: Journal of Ophthalmology
https://www.readbyqxmd.com/read/29053555/case-series-analysis-of-myopic-progression-control-with-a-unique-extended-depth-of-focus-multifocal-contact-lens
#2
Jeffrey Cooper, Brett OʼConnor, Ronald Watanabe, Randall Fuerst, Sharon Berger, Nadine Eisenberg, Sally M Dillehay
OBJECTIVES: To determine the rate of myopia progression in children fit with a commercially available extended depth of focus (center distance) multifocal soft contact lens with attributes theoretically expected to slow the progression of myopia. METHODS: A retrospective case series analysis of 32 patients (ages 6-19 years, mean 10.98±2.95) from 10 practice locations was performed. At initial presentation, 44% wore spectacles, 37.5% spherical soft contact lenses, 15...
October 19, 2017: Eye & Contact Lens
https://www.readbyqxmd.com/read/29033270/a-survey-of-contact-lens-related-complications-in-a-tertiary-hospital-in-china
#3
Weiwei Li, Xuguang Sun, Zhiqun Wang, Yang Zhang
PURPOSE: To describe the type of complications related to contact lens (CL) wear in a tertiary hospital in XX, China. METHODS: A retrospective study of 141 patients who complained discomfort after wearing contact lens on an outpatient basis of XX Hospital were conducted from the January 2012 to December 2015. The data included patients' demographics, lens type, history, slit-lamp examination, reports of corneal scrapings, culture, and examination of in vivo confocal microscopy...
October 12, 2017: Contact Lens & Anterior Eye: the Journal of the British Contact Lens Association
https://www.readbyqxmd.com/read/29030016/does-a-two-year-period-of-orthokeratology-lead-to-changes-in-the-endothelial-morphology-of-children
#4
Sin Wan Cheung, Pauline Cho
PURPOSE: To compare changes in endothelial morphology in the central and superior cornea in subjects wearing single-vision spectacles and orthokeratology lenses over two years. METHODS: Endothelial images of the two locations of 99 subjects (6-12 years) from completed myopia control studies were analysed. Endothelial cell density (ECD), coefficient of variation in cell size (CV), and hexagonality (HEX) before and two years after treatment were compared between the two groups of subjects...
October 10, 2017: Contact Lens & Anterior Eye: the Journal of the British Contact Lens Association
https://www.readbyqxmd.com/read/29026787/factors-determining-effective-orthokeratology-treatment-for-controlling-juvenile-myopia-progression
#5
Qinghui Kong, Jiang Guo, Jing Zhou, Yanling Zhang, Xiaoyan Dou
BACKGROUND: We aimed to identify factors influencing the therapeutic outcome of orthokeratology on controlling juvenile myopia progression, and the risk factors for complications. METHODS: Myopic patients (n=724) in Shenzhen Second Hospital from Jan 2011 to Jan 2016 fitted with orthokeratology lenses and followed-up for 6-65 months were reviewed retrospectively. Univariate and multivariate logistic regression analyses were used to screen for the factors that can improve treatment outcome and prevent the development of complications...
September 2017: Iranian Journal of Public Health
https://www.readbyqxmd.com/read/29018754/how-to-effectively-manage-myopia
#6
Ann Yi-Chiun Chuang
Myopia has become epidemic in the world. Without effective control, the progression may lead to excessive myopia with severe complications affecting vision and ocular alignment. The genetic factors and environmental factors of myopia are closely interrelated to each other. Asian ethnicity and parental myopia, among other genetic factors, influence the refractive outcome dramatically when environmental risk factors such as hours of near work and reading distance are analyzed. Outdoor activities are protective measures that retard myopia progression...
January 2017: Taiwan Journal of Ophthalmology
https://www.readbyqxmd.com/read/28988643/a-novel-fitting-algorithm-for-alignment-curve-radius-estimation-using-corneal-elevation-data-in-orthokeratology-lens-trial
#7
Lu Zhang, Yue Zhang, Yanlin Liu, Kai Wang, Mingwei Zhao
PURPOSE: To evaluate a novel fitting algorithm for estimation of alignment curve (AC) radius during orthokeratology lens trial. METHODS: Fifty myopic children were recruited in this study. AC radii were estimated by both traditional method using flat K readings and eccentricity values and by a novel fitting algorithm, which was composed of 256 circle fittings using corneal elevation data from the corresponding AC region and a succedent toric fitting based on these calculated AC curvatures...
October 4, 2017: Contact Lens & Anterior Eye: the Journal of the British Contact Lens Association
https://www.readbyqxmd.com/read/28945652/comparison-between-viscous-teardrops-and-saline-solution-to-fill-orthokeratology-contact-lenses-before-overnight-wear
#8
Gonzalo Carracedo, Cesar Villa-Collar, Alba Martin-Gil, Maria Serramito, Leticia Santamaría
OBJECTIVE: To compare, in terms of efficacy, the differences between the use of saline solution and a viscous artificial tear to fill the lens during the first month of orthokeratology wear. METHODS: A pilot, double-masked, crossed, randomized, and prospective study was conducted. In this study, 20 subjects (14 males and 6 females) with a mean age of 16.29±6.22 years (range, 10-26) were fitted with orthokeratology contact lenses. For the study, nonpreserved 0.9% NaCl commercial saline solution (Avizor, Madrid, Spain) and nonpreserved artificial teardrops with 0...
September 21, 2017: Eye & Contact Lens
https://www.readbyqxmd.com/read/28935528/choroidal-thickness-and-axial-length-changes-in-myopic-children-treated-with-orthokeratology
#9
Zhouyue Li, Dongmei Cui, Yin Hu, Sichun Ao, Junwen Zeng, Xiao Yang
PURPOSE: To analyze the change in subfoveal choroidal thickness (SFChT) and its relationship with changes in axial length (AL) in myopic children treated with Orthokeratology (Ortho-k). METHODS: Fifty myopic children participated in this study: 29 subjects were treated with Ortho-k lenses and 21 with single vision distance spectacles. The SFChT and ocular biometrics, including AL, were measured at baseline, one month, and six months after lens wear in both groups...
September 18, 2017: Contact Lens & Anterior Eye: the Journal of the British Contact Lens Association
https://www.readbyqxmd.com/read/28845432/interaction-between-corneal-and-internal-ocular-aberrations-induced-by-orthokeratology-and-its-influential-factors
#10
Qingzhong Chen, Min Li, Ying Yuan, Rao Me, Yunjie Yu, Guangsen Shi, Bilian Ke
PURPOSE: To investigate the interaction between corneal, internal, and total wavefront aberrations (WAs) and their influential factors during orthokeratology (OK) treatment in Chinese adolescents. METHODS: Thirty teenagers (n = 30 eyes) were enrolled in the study; spherical equivalent refraction (SE), corneal curvature radius (CCR), central corneal thickness (CCT), WAs, and the difference in limbal transverse diameter and OK lens diameter (ΔLLD) were detected before and after one-month OK treatment...
2017: BioMed Research International
https://www.readbyqxmd.com/read/28771841/disturbing-the-balance-effect-of-contact-lens-use-on-the-ocular-proteome-and-microbiome
#11
REVIEW
Maureen Boost, Pauline Cho, Zhaoran Wang
Contact lens wear is a popular, convenient and effective method for vision correction. In recent years, contact lens practice has expanded to include new paradigms, including orthokeratology; however, their use is not entirely without risk, as the incidence of infection has consistently been reported to be higher in contact lens wearers. The explanations for this increased susceptibility have largely focused on physical damage, especially to the cornea, due to a combination of hypoxia, mechanical trauma, deposits and solution cytotoxicity, as well as poor compliance with care routines leading to introduction of pathogens into the ocular environment...
August 3, 2017: Clinical & Experimental Optometry: Journal of the Australian Optometrical Association
https://www.readbyqxmd.com/read/28752898/contact-lenses-to-slow-progression-of-myopia
#12
REVIEW
Padmaja Sankaridurg
The prevalence of myopia has been steadily rising, with 28 per cent of the global population said to be affected in 2010 and to rise to affect nearly 50 per cent by 2050. Increasing levels of myopia increase the risk of vision impairment and in particular, high myopia is associated with the risk of serious and permanent visual disability due to associated sight-threatening complications. To stem the burden associated with higher levels of myopia, there are efforts to slow the progression of myopia, and several optical and pharmaceutical strategies have been found useful in slowing myopia to varying degrees...
July 28, 2017: Clinical & Experimental Optometry: Journal of the Australian Optometrical Association
https://www.readbyqxmd.com/read/28742623/prediction-of-orthokeratology-lens-decentration-with-corneal-elevation
#13
Zhi Chen, Feng Xue, Jiaqi Zhou, Xiaomei Qu, Xingtao Zhou
SIGNIFICANCE: Lens decentration is common and unavoidable to some extent during ortho-k treatment. By using a simplified method, we are able to predict the magnitude and direction of ortho-k lens decentration, which provides useful insights in screening for ideal ortho-k candidates and to make a quick decision when decentration happens. PURPOSE: The aim of this study was to investigate the influence of corneal elevation asymmetry on ortho-k lens decentration. METHODS: Thirty-six eyes of 36 subjects were fitted with four-curve reverse geometry ortho-k contact lenses...
September 2017: Optometry and Vision Science: Official Publication of the American Academy of Optometry
https://www.readbyqxmd.com/read/28712892/discontinuation-of-long-term-orthokeratology-lens-wear-and-subsequent-refractive-surgery-outcome
#14
Pauline Kang, Helen Swarbrick
PURPOSE: To report a case of lens discontinuation in a long term orthokeratology (OK) lens wearer and describe regression in refraction, corneal topography, and corneal thickness over 408days after lens discontinuation. Furthermore, the outcome of subsequent LASIK treatment is also reported. CASE REPORT: A 41year old Caucasian female who had been previously wearing OK lenses for 13 years discontinued lens wear in the left eye to consider refractive surgery in that eye...
July 13, 2017: Contact Lens & Anterior Eye: the Journal of the British Contact Lens Association
https://www.readbyqxmd.com/read/28653613/myopia-correction-in-children-a-meta-analysis
#15
Yanhui Cui, Li Li, Qian Wu, Junyang Zhao, Huihui Chu, Gang Yu, Wenbin Wei
PURPOSE: The purpose of this study was to conduct a meta-analysis comparing rigid gas permeable lenses (RGP) with soft contact lenses (SCL), spectacles and orthokeratology (OK) lenses for myopia control with respect to axial length elongation, spherical equivalent and measures of corneal curvature. METHODS: Medline, Cochrane, EMBASE, and Google Scholar databases were searched to September 29, 2015 using the following keywords: rigid gas permeable contact lens; refractive error; and refractive abnormalities...
June 26, 2017: Clinical and Investigative Medicine. Médecine Clinique et Experimentale
https://www.readbyqxmd.com/read/28639449/-optic-properties-of-myopic-correction-by-orthokeratology-contact-lenses-a-case-report
#16
M Mýlková, F Pluháček
INTRODUCTION: Orthokeratology lenses present a special type of hard contact lenses, which is used especially for myopic correction. The lenses are applied during the night, when thanks to their special shape cause temporally (reversible) change of the cornea shape. During the day, there is not necessary to wear any other refractive correction. Due to the wearing regimen, there is, comparing to the classical contact lenses, higher risk of health complications. For their safe use, it is necessary to pay attention to the application of lenses of adequate parameters, follow up the care and hygiene precautions, regular controls and early treatment of possible problems...
2017: Ceská a Slovenská Oftalmologie
https://www.readbyqxmd.com/read/28617728/a-comparison-of-the-effects-of-orthokeratology-lens-medcall-lens-and-ordinary-frame-glasses-on-the-accommodative-response-in-myopic-children
#17
Xiaoxia Han, Dongjun Xu, Weizhong Ge, Zhi Wang, Xiaodong Li, Weihua Liu
OBJECTIVE: To observe and compare changes in accommodative response between myopic children wearing ordinary frame glasses (OFG), Mouldway orthokeratology lenses (M-OK), and medcall lenses (ML). METHODS: A total of 240 myopic children were divided into three groups: OFG [n=90]; M-OK [n=90]; and ML [n=60]). The diopter, accommodative lag, and binocular accommodative facility before wearing glasses (T0) and 1-year after wearing glasses (T1) were compared among the three groups...
June 14, 2017: Eye & Contact Lens
https://www.readbyqxmd.com/read/28537642/orthokeratology-treatment-in-pediatric-myopia
#18
EDITORIAL
Leonard B Nelson
No abstract text is available yet for this article.
May 1, 2017: Journal of Pediatric Ophthalmology and Strabismus
https://www.readbyqxmd.com/read/28534320/infectious-keratitis-and-orthokeratology-lens-use-a-systematic-review
#19
REVIEW
Ka Wai Kam, Wing Yung, Gabriel Ka Hin Li, Li Jia Chen, Alvin L Young
PURPOSE: Myopia is a prevalent condition among Asians. Orthokeratology lens has gained popularity as a method of myopia control. This systematic review is to summarize the clinical profile of infectious keratitis in association with orthokeratology lens wear. METHODS: We searched in the PubMed and EMBASE for articles adopting the search strategy "(orthokeratology lens OR orthokeratology) AND (bacterial eye infection OR keratitis OR cornea ulcer OR microbial keratitis OR bacterial keratitis)", from the start date of the databases to August 23, 2016...
May 22, 2017: Infection
https://www.readbyqxmd.com/read/28489806/the-relationship-between-corneal-biomechanics-and-anterior-segment-parameters-in-the-early-stage-of-orthokeratology-a-pilot-study
#20
Renai Chen, Xinjie Mao, Jun Jiang, Meixiao Shen, Yan Lian, Bin Zhang, Fan Lu
To investigate the relationship between corneal biomechanics and anterior segment parameters in the early stage of overnight orthokeratology.Twenty-three eyes from 23 subjects were involved in the study. Corneal biomechanics, including corneal hysteresis (CH) and corneal resistance factor (CRF), and parameters of the anterior segment, including corneal curvature, central corneal thickness (CCT), and corneal sublayers' thickness, were measured at baseline and day 1 and 7 after wearing orthokeratology lens. One-way analysis of variance with repeated measures was used to compare the longitudinal changes and partial least squares linear regression was used to explore the relationship between corneal biomechanics and anterior segment parameters...
May 2017: Medicine (Baltimore)
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