Article
Ophthalmology
Erin S. Tomiyama, David A. Berntsen, Kathryn Richdale
Summary: This study aimed to compare the effects of toric orthokeratology (TOK) and soft toric multifocal (STM) contact lenses on peripheral refraction in patients with astigmatism and myopia. The results showed that TOK induced greater myopic shift and astigmatism compared to STM, which may impact the efficacy of myopia management.
INVESTIGATIVE OPHTHALMOLOGY & VISUAL SCIENCE
(2022)
Article
Medicine, General & Internal
Changfei Li, Li Zeng, Jiaqi Zhou, Bingjie Wang, Zhi Chen
Summary: This retrospective study investigated the relationship between the toricity of dual-axis corneal refractive therapy (CRT) orthokeratology lenses and corneal parameters. The study found a positive correlation between corneal astigmatism and the difference in elevation at 8 mm chord length with CRT lens toricity. The difference in elevation at 8 mm chord length can be used to estimate CRT lens toricity in clinical practice.
JOURNAL OF CLINICAL MEDICINE
(2022)
Article
Ophthalmology
Jason K. Lau, Kin Wan, Pauline Cho
Summary: The study aimed to investigate the effectiveness of orthokeratology (ortho-k) lenses for myopia control and the corneal changes with increased compression factor. The findings showed that ortho-k lenses with increased compression factor can effectively slow down the progression of myopia without compromising corneal health. Further research is needed to confirm the potential mechanism of an increased compression factor for improved myopia control effectiveness.
CONTACT LENS & ANTERIOR EYE
(2023)
Article
Ophthalmology
Jian Lin, Dexiang An, Yun Lu, Dongmei Yan
Summary: The study found that the magnitude of ocular residual astigmatism in myopic children is relatively large, and it primarily compensates for anterior corneal astigmatism.
Article
Medicine, General & Internal
Martin Loertscher, Simon Backhouse, John R. Phillips
Summary: The study found that MOK lenses significantly reduce eye growth compared to conventional OK lenses over an 18-month period.
JOURNAL OF CLINICAL MEDICINE
(2021)
Article
Ophthalmology
Erin S. Tomiyama, Chuan Hu, Jason D. Marsack, Kathryn Richdale
Summary: The study aimed to compare the impact of using TOK and STM contact lenses on higher order aberrations in myopic astigmatic eyes, showing that TOK induced higher HORMS, spherical aberration, and coma RMS compared to STM.
OPHTHALMIC AND PHYSIOLOGICAL OPTICS
(2021)
Article
Ophthalmology
Erin S. Tomiyama, Anna-Kaye Logan, Kathryn Richdale
Summary: The study on corneal shape and the relationship between peripheral elevation and central astigmatism in astigmatic individuals found a high correlation between central corneal astigmatism and peripheral elevation, suggesting that central corneal astigmatism may be a more expedient measure for clinical use. Additionally, the treatment area decreased as corneal astigmatism and elevation increased.
EYE & CONTACT LENS-SCIENCE AND CLINICAL PRACTICE
(2021)
Article
Medicine, General & Internal
Weiwei Lu, Rui Ning, Kai Diao, Yang Ding, Ruru Chen, Lei Zhou, Yan Lian, Colm McAlinden, Francis W. B. Sanders, Fangfang Xia, Jinhai Huang, Wanqing Jin
Summary: This study compared the efficacy and safety of corneal refractive therapy (CRT) lenses and vision shaping treatment (VST) lenses for myopia control in children. The results showed that compared with VST lenses, CRT lenses had a weaker effect on myopia control but were safer. Different types of VST lenses had similar efficacy and safety in controlling myopia progression.
FRONTIERS IN MEDICINE
(2022)
Article
Ophthalmology
Di Wang, Dejia Wen, Bin Zhang, Weiping Lin, Guihua Liu, Bei Du, Fang Lin, Xiaorong Li, Ruihua Wei
Summary: The study examined the association between Fourier parameters and axial length growth in children undergoing orthokeratology. The results showed that F0 and F1 were negatively associated with ALG, and had correlations with axial length, CTZ decentration, and spherical equivalent.
CURRENT EYE RESEARCH
(2021)
Article
Medicine, General & Internal
Jiao Zhao, Jing Zhao, Wen Yang, Huamao Miao, Lingling Niu, Jianmin Shang, Xiaoying Wang, Xingtao Zhou
Summary: Variations of PACD and ACA were greater in eyes after TICL (V4c) implantation compared with identically sized ICL (V4c) implantation, with larger lenses showing larger changes. Pre-operative anterior chamber structure and vault were significantly associated with post-operative PACD and ACA.
FRONTIERS IN MEDICINE
(2021)
Article
Ophthalmology
Anken Wang, Chenhao Yang, Li Shen, Jiaying Wang, Zhehuan Zhang, Weiming Yang
Summary: This study retrospectively investigated the axial length changes in myopic children wearing orthokeratology lenses and found that after initial shortening, the axial length rapidly rebounded during the washout period and shortened again when lenses were re-worn. The changes in axial length were significantly correlated with the initial axial length. Therefore, measuring axial length after the washout period can provide a more objective and accurate evaluation of orthokeratology, and the existence and degree of axial shortening can predict long-term myopia development.
Article
Multidisciplinary Sciences
Ruriko Takaku, Shinichiro Nakano, Masaharu Iida, Tetsuro Oshika
Summary: The new toric intraocular lens TECNIS toric II demonstrated significantly better rotational stability and less prediction errors compared to its predecessor TECNIS toric I, possibly due to quicker unfolding and greater friction with the capsular bag.
SCIENTIFIC REPORTS
(2021)
Article
Cell Biology
Li Li, Taichen Lai, Jing Zou, Linling Guo, Zhiming Lin, Jiawen Lin, Ying Xue
Summary: This study investigated the effects of an orthokeratology lens on tear film and tarsal glands, as well as myopia control in children with unilateral myopia, using an intelligent analysis model. The study found that tear film break-up times differed significantly in the treatment group, and there were also significant differences in the deformation coefficients of the meibomian glands. In contrast, the control group showed no significant differences.
FRONTIERS IN CELL AND DEVELOPMENTAL BIOLOGY
(2023)
Article
Ophthalmology
Chenglu Ding, Yunyun Chen, Xue Li, Yingying Huang, Hao Chen, Jinhua Bao
Summary: Increased higher-order aberrations and improved accommodative accuracy were observed during orthokeratology treatment, but began to regress after the cessation of orthokeratology. A significant positive correlation between improved accommodative accuracy and slowed axial elongation was only observed during the first 6 months of treatment.
OPHTHALMIC AND PHYSIOLOGICAL OPTICS
(2022)
Article
Ophthalmology
James S. Wolffsohn, Yasmin Whayeb, Nicola S. Logan, Rebecca Weng, Int Myopia Inst Ambassador Grp
Summary: Surveys in 2015 and 2019 showed that there was a high level of concern and activity about myopia among eye care practitioners, but most of them still prescribed single vision interventions for young myopes. This research aimed to provide updated information on this topic. The results showed that practitioners in Asia had a significantly higher level of concern about pediatric myopia compared to other continents. Combination therapy was perceived as the most effective method of myopia control, followed by orthokeratology and pharmaceutical approaches, while single vision interventions were seen as the least effective.
INVESTIGATIVE OPHTHALMOLOGY & VISUAL SCIENCE
(2023)
Article
Ophthalmology
Pauline Cho, Hoi Ying Poon, Chia Ching Chen, Lien Tao Yuon
OPHTHALMIC AND PHYSIOLOGICAL OPTICS
(2020)
Article
Ophthalmology
Qi Tan, Alex L. K. Ng, Bonnie N. K. Choy, George P. M. Cheng, Victor C. P. Woo, Pauline Cho
OPHTHALMIC AND PHYSIOLOGICAL OPTICS
(2020)
Article
Ophthalmology
Bi Yang, Xueqin Ma, Longqian Liu, Pauline Cho
Summary: The study found that Chinese children wearing orthokeratology lenses had significantly better scores in overall vision, far vision, appearance, satisfaction, activities, and peer perceptions compared to those wearing single vision spectacles. Although some ocular discomfort may occur when wearing ortho-k lenses at night, the benefits outweigh the discomfort, resulting in better vision-related quality of life for Chinese children.
CONTACT LENS & ANTERIOR EYE
(2021)
Review
Ophthalmology
Xingyu Wang, Bi Yang, Longqian Liu, Pauline Cho
Summary: The main motivation for parents to choose ortho-k for their children was the rapid progression of myopia, with most learning about ortho-k through word of mouth. The most common symptom during treatment was itchy or sore eyes, usually only initially. Children's willingness to participate is crucial for successful ortho-k treatment, even though their motivation may differ from that of their parents. Ortho-k is widely accepted as an option for myopia control in children.
OPHTHALMIC AND PHYSIOLOGICAL OPTICS
(2021)
Article
Ophthalmology
Stephen J. Vincent, Qi Tan, Alex L. K. Ng, George P. M. Cheng, Victor C. P. Woo, Pauline Cho
OPHTHALMIC AND PHYSIOLOGICAL OPTICS
(2020)
Article
Ophthalmology
Qi Tan, Alex L. K. Ng, George P. M. Cheng, Victor C. P. Woo, Pauline Cho
Summary: The study found that pupil size measurements using the NIDEK OPD-Scan III were highly repeatable in myopic children, making it suitable for use in this population.
OPHTHALMIC AND PHYSIOLOGICAL OPTICS
(2021)
Article
Ophthalmology
Sin Wan Cheung, Maureen Valerie Boost, Pauline Cho
Summary: The study found that using a povidone iodine-based rigid lens disinfecting solution effectively reduced contamination rates of lenses and lens cases and conjunctival colonization. Regardless of the cleaning routine adopted, there were no significant differences observed in conjunctival colonization or contamination of lenses or cases.
CONTACT LENS & ANTERIOR EYE
(2021)
Article
Ophthalmology
Biyue Guo, Pauline Cho, Nathan Efron
CLINICAL AND EXPERIMENTAL OPTOMETRY
(2021)
Article
Ophthalmology
Kin Wan, Hing Tuen Yau, Sin Wan Cheung, Pauline Cho
Summary: This study evaluated thickness changes in different layers of the cornea in myopic children during and after short-term ortho-k lens wear. The results showed significant reductions in CET with higher reduction in eyes wearing ICF lenses, while corneal thickness changes were reversible after discontinuing lens wear.
OPHTHALMIC AND PHYSIOLOGICAL OPTICS
(2021)
Article
Ophthalmology
Biyue Guo, Sin Wan Cheung, Randy Kojima, Pauline Cho
Summary: The 1-year results of the VOLTZ Study show that orthokeratology lenses with different back optic zone diameters have a varying effect on myopia control in children. Using lenses with a 5mm BOZD can lead to slower axial elongation, while maintaining similar lens performance and ocular integrity compared to lenses with a 6mm BOZD.
OPHTHALMIC AND PHYSIOLOGICAL OPTICS
(2021)
Article
Ophthalmology
Yajing Yang, Sin Wan Cheung, Pauline Cho, Stephen J. Vincent
Summary: The study found that the estimated myopia progression by the BHVI Myopia Calculator was in close agreement with the actual measured values after 1 and 2 years, but caution is advised when interpreting the data as it only fell within the 95% confidence interval for a relatively small percentage of children.
OPHTHALMIC AND PHYSIOLOGICAL OPTICS
(2021)
Article
Infectious Diseases
Zhi Chen, Jifang Wang, Jun Jiang, Bi Yang, Pauline Cho
Summary: This study investigated the impact of guidelines on the knowledge, attitude, and prescribing habits of ortho-k practitioners. The findings showed that the implementation of the guidelines significantly improved the overall prescribing habits, but some practitioners still need to improve their behavior.
Article
Ophthalmology
Biyue Guo, Huihuan Wu, Sin Wan Cheung, Pauline Cho
Summary: This study compared the treatment zone measurements obtained using manual and software-based methods in orthokeratology subjects. The results showed significant differences between the two methods, suggesting that they cannot be used interchangeably. The study also found significant differences in treatment zone parameters between slow and fast axial elongation subjects, indicating a potential role of the treatment zone in regulating myopia progression in ortho-k.
OPHTHALMIC AND PHYSIOLOGICAL OPTICS
(2022)
Article
Ophthalmology
Bi Yang, Longqian Liu, Pauline Cho
Summary: This study investigated the compliance of orthokeratology wearers and their parents with care routines in a hospital setting in Chengdu, China. The results showed that parental supervision and instructions from eye care practitioners were important factors in increasing compliance. Regular reinforcement of care procedures, especially for older and male wearers, is crucial.
OPHTHALMIC AND PHYSIOLOGICAL OPTICS
(2022)
Article
Ophthalmology
Biyue Guo, Sin Wan Cheung, Randy Kojima, Pauline Cho
Summary: The purpose of this study was to compare the axial elongation (AE) and treatment zone (TZ) characteristics in children wearing 6 mm or 5 mm orthokeratology lenses over 2 years. The results showed that children wearing 5 mm lenses had a smaller TZ diameter and less AE after 24 months of treatment, with no difference in choroidal thickness changes. In conclusion, using orthokeratology lenses with a smaller back optic zone diameter can slow down axial elongation in children.
OPHTHALMIC AND PHYSIOLOGICAL OPTICS
(2023)