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Orthokeratology

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https://www.readbyqxmd.com/read/29329901/effects-of-orthokeratology-on-axial-length-growth-in-myopic-anisometropes
#1
Zhi Chen, Jiaqi Zhou, Xiaomei Qu, Xingtao Zhou, Feng Xue
PURPOSE: To investigate the effect of orthokeratology (ortho-k) lens wear on axial length (AL) growth in juvenile myopic anisometropes. METHODS: This retrospective study consisted of two parts. In Part One, 25 anisometropic participants (mean age, 11.2 ± 1.9 years; 11 females and 14 males) were fitted with ortho-k lenses in the more myopic eye only, and the rate of AL growth was compared between the ortho-k lens wearing eye and the untreated contralateral eye over an average period of 23...
January 10, 2018: Contact Lens & Anterior Eye: the Journal of the British Contact Lens Association
https://www.readbyqxmd.com/read/29283679/influence-of-short-term-orthokeratology-to-corneal-tangent-modulus-a-randomized-study
#2
Andrew Kc Lam, Stanley Yy Leung, Ying Hon, Lu Shu-Ho, Kit-Ying Wong, Pui-Kwan Tiu, David Cc Lam
PURPOSE: Influence of orthokeratology on corneal biomechanics is equivocal using Ocular Response Analyzer, ORA. Implementing indentation method, corneal tangent modulus was measured and monitored in short-term orthokeratology. MATERIALS AND METHODS: Sixteen young subjects with refractive errors between -4D to -5D sphere and astigmatism within -1.50D were recruited. One randomly selected eye wore orthokeratology lens (treatment), and the fellow eye wore conventional rigid gas permeable lens (control)...
December 28, 2017: Current Eye Research
https://www.readbyqxmd.com/read/29219898/orthokeratology-and-contact-lens-quality-of-life-questionnaire-ocl-qol
#3
Colm McAlinden, Michael Lipson
OBJECTIVES: To develop a quality of life (QoL) instrument for patients fitted with Orthokeratology (OrthoK) and other modalities of contact lenses. METHODS: A 45-item pilot questionnaire was developed from an extensive literature review, focus groups, and interviews. Subsequently, 234 participants fitted with contact lenses (OrthoK, soft lenses, and gas permeable lenses) or spectacles completed the pilot questionnaire. Rasch analysis was used to assess the psychometric properties in terms of person separation, item fit statistics, category threshold ordering, differential item functioning (DIF), and targeting...
December 5, 2017: Eye & Contact Lens
https://www.readbyqxmd.com/read/29216865/effect-of-orthokeratology-on-myopia-progression-twelve-year-results-of-a-retrospective-cohort-study
#4
Yueh-Chang Lee, Jen-Hung Wang, Cheng-Jen Chiu
BACKGROUND: Several studies reported the efficacy of orthokeratology for myopia control. Somehow, there is limited publication with follow-up longer than 3 years. This study aims to research whether overnight orthokeratology influences the progression rate of the manifest refractive error of myopic children in a longer follow-up period (up to 12 years). And if changes in progression rate are found, to investigate the relationship between refractive changes and different baseline factors, including refraction error, wearing age and lens replacement frequency...
December 8, 2017: BMC Ophthalmology
https://www.readbyqxmd.com/read/29198091/-treatments-for-slowing-the-progression-of-myopia
#5
REVIEW
Nir Erdinest, Yair Morad
Myopia is the most common refractive error and is now endemic over the entire industrial world, particularly in Asia. High myopia is one of the major causes of blindness in the world. Slowing the progress of myopia is possible, the most effective treatment being atropine ophthalmic drops, given in a dose-dependent fashion. Although high-dose atropine (1% and 0.5%) was found to be highly effective in slowing myopia progression, low-dose atropine (0.01%) was found to have the lowest rebound effect (accelerated myopia progression after treatment cessation) and was therefore, the most effective treatment in the long term...
November 2017: Harefuah
https://www.readbyqxmd.com/read/29165412/-stabilizing-effectiveness-of-orthokeratology-and-long-term-minute-concentration-atropine-therapy-in-myopia-draft-report
#6
T Yu Verzhanskaya, E P Tarutta
The rational for the study was the high prevalence of myopia in the world. According to the World Health Organization (WHO), myopia is one of the five leading causes of blindness and low vision. Of recent reports on conservative measures for the stabilization of myopia, two areas of investigation deserve attention: methods of optical correction that affect peripheral refraction, orthokeratology lenses (OKL) in particular, and pharmacotherapy. The aim of the study was to evaluate the effectiveness and safety of myopia control in pediatric patients by combining two methods - OKL wearing and instillation of extra low doses of atropine (0...
2017: Vestnik Oftalmologii
https://www.readbyqxmd.com/read/29098084/influence-of-overnight-orthokeratology-on-corneal-surface-shape-and-optical-quality
#7
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
#8
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
#9
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
#10
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
#11
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
#12
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
#13
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
#14
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
#15
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
#16
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
#17
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
#18
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
#19
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
#20
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
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