Article
Multidisciplinary Sciences
Xingxue Zhu, Yuliang Wang, Yujia Liu, Chaoying Ye, Xingtao Zhou, Xiaomei Qu
Summary: This study found that the use of 0.01% atropine eye drops can effectively prevent myopia progression, but it also leads to an increase in axial length and total astigmatism in myopic Chinese children.
Article
Ophthalmology
Stephen J. Vincent, Pauline Cho, Ka Yin Chan, Daddi Fadel, Neema Ghorbani-Mojarrad, Jose M. Gonzalez-Meijome, Leah Johnson, Pauline Kang, Langis Michaud, Patrick Simard, Lyndon Jones
Summary: Orthokeratology is a method of temporarily reshaping the cornea using specialty contact lenses to correct refractive errors, and has been increasingly used to slow the progression of myopia in children. This report reviews the practice of ortho-k, including safety considerations, suitable candidates, and key factors such as lens design.
CONTACT LENS & ANTERIOR EYE
(2021)
Article
Ophthalmology
Zhi Chen, Zhe Zhang, Feng Xue, Jiaqi Zhou, Li Zeng, Xiaomei Qu, Xingtao Zhou
Summary: This study investigated the relationship between myopia progression and axial length elongation in orthokeratology patients. The results showed that myopia significantly progressed and axial length increased after ortho-k treatment, and this progression was related to changes in corneal curvature, baseline age, and duration of treatment.
CONTACT LENS & ANTERIOR EYE
(2023)
Article
Pediatrics
Suei-Cheng Wong, Chea-Su Kee, Tsz-Wing Leung
Summary: This study investigated the prevalence of astigmatism and visual habits among Hong Kong students after the home confinement period due to the COVID-19 pandemic. The results showed a high prevalence of astigmatism, and astigmatic children had longer axial length and fewer outdoor activities compared to their non-astigmatic peers.
Article
Ophthalmology
Lu Sun, Zheng-Xuan Li, Shi-Peng Wang, Hong-Xin Song
Summary: The purpose of this study was to explore the correlation between axial length difference and refractive error in children with unilateral myopia anisometropia (UMA) and its clinical application in reviewing Ortho-K lenses. The study found that every 1 mm change in axial length corresponded to a change of -1.627 D in refractive error. Age did not affect the relationship between axial length changes and the degree of myopia. The Ortho-K lens treatment slowed down the growth of axial length in myopic eyes.
JOURNAL OF OPHTHALMOLOGY
(2023)
Article
Ophthalmology
Masato Kakisu, Takayuki Baba, Tomoaki Tatsumi, Takehito Iwase, Tomohiro Nizawa, Gen Miura, Shuichi Yamamoto
Summary: The study found a significant correlation between postoperative refractive error and attempted refractive error after intrascleral fixation of an IOL. The surgical options were not directly associated with the differences in refractive errors, but the size of the sclerocorneal incision and presence of sutures were found to impact the postoperative degree of astigmatism.
GRAEFES ARCHIVE FOR CLINICAL AND EXPERIMENTAL OPHTHALMOLOGY
(2021)
Article
Green & Sustainable Science & Technology
Wenfei Zhu, Longhai Zhang, Ling Zhang, Longkun Qiu, Jiawei Guo, Zheng'ao Li, Yuliang Sun
Summary: Research shows a negative association between physical activity and refractive error, especially outdoor activity. This study examines the association of physical activity levels and sedentary time with refractive error in boys and girls living in urban and rural areas. The results suggest that maintaining a healthy lifestyle can help reduce the risk of refractive error in boys and girls.
Article
Multidisciplinary Sciences
Sung Uk Han, Soyoung Ryu, Hyunjean Jung, Hyunmin Ahn, Sangyeop Kim, Ikhyun Jun, Kyoung Yul Seo, Tae-im Kim
Summary: This study investigated keratometric measurements according to axial length in an aged population. It found a negative correlation between mean corneal curvature and axial length, but no significant differences in corneal astigmatism based on axial length. The study also showed good inter-device reliability for mean corneal curvature but not corneal astigmatism among the four ophthalmic devices.
SCIENTIFIC REPORTS
(2022)
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
Multidisciplinary Sciences
Soyoung Ryu, Ikhyun Jun, Tae-im Kim, Kyoung Yul Seo, Eung Kweon Kim
Summary: Total keratometry (TK) and standard keratometry (K) showed comparable performance for intraocular lens (IOL) power calculation in eyes undergoing femtosecond laser-assisted cataract surgery. TK had lower mean absolute error (MAE) and median absolute error (MedAE) compared to K, with better performance observed for certain IOL formulas such as SRK/T and Holladay 1.
SCIENTIFIC REPORTS
(2021)
Review
Ophthalmology
Victor Rodriguez-Lopez, Carlos Dorronsoro
Summary: The evaluation of refractive error is crucial in eye care, and subjective refraction has been the gold standard method for centuries. This article reviews recent technologies and approaches aiming to improve subjective refraction.
CURRENT OPINION IN OPHTHALMOLOGY
(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
Medicine, General & Internal
Sonia H. Yoo, Mike Zein
Summary: The passage provides information on the Bascom Palmer Eye Institute at the University of Miami Miller School of Medicine in Miami, Florida, including the address and contact information.
MEDICAL CLINICS OF NORTH AMERICA
(2021)
Article
Medicine, General & Internal
Changting Tang, Zijing Du, Guanrong Wu, Xuanyun Tan, Siwen Zang, Honghua Yu, Yijun Hu
Summary: This study investigated the distribution of ocular residual astigmatism (ORA) and its associations with age, gender, manifest refraction, and other ocular indicators in Chinese patients with myopia. The findings suggest that ORA is influenced by multiple ocular factors and can provide valuable information for astigmatism correction in candidates for refractive surgery.
FRONTIERS IN MEDICINE
(2022)
Article
Medicine, General & Internal
Ignacio Almorin-Fernandez-Vigo, Ines Sanchez-Guillen, Jose Ignacio Fernandez-Vigo, Barbara Burgos-Blasco, Lucia De-Pablo-Gomez-de-Liano, Jose angel Fernandez-Vigo, Ana Macarro-Merino
Summary: This study aims to obtain normative corneal astigmatism data in a local population and describe their axis distribution and association with other parameters. The results showed that the mean anterior corneal astigmatism (ACA) and posterior corneal astigmatism (PCA) were 1.01 ± 0.79 D and 0.34 ± 0.17 D, respectively. The vertical steep axis distribution accounted for 73.5% of ACA and 93.3% of PCA. The frequency of vertical ACA orientation decreased with age, while the frequency of vertical PCA orientation increased with higher PCA.
JOURNAL OF CLINICAL MEDICINE
(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)