Article
Clinical Neurology
Xiaohang Chen, Yan Xiong, Xinzhou Qi, Longqian Liu
Summary: The objective of this study was to observe the changes in peripheral refraction in myopic adolescents after overnight orthokeratology and its influencing factors. The results showed that after wearing orthokeratology lenses, the relative peripheral refraction in myopic patients changed from relative hyperopia to relative myopia, and the nasal-temporal asymmetry also changed significantly. This change was correlated with the baseline refractive state.
FRONTIERS IN NEUROLOGY
(2023)
Article
Ophthalmology
David A. Atchison, Jos J. Rozema
Summary: This study provides an overview of the misconceptions and potential artefacts associated with measuring peripheral refractive error and eye length, and discusses their implications for determining retinal shape and myopia development. Several issues were identified, such as the relationship between peripheral refractive error and myopia development, and the accuracy of measuring peripheral eye length using an optical biometer. Some of these issues can be addressed, while others require further investigation.
OPHTHALMIC AND PHYSIOLOGICAL OPTICS
(2023)
Article
Medicine, General & Internal
Katharina Breher, Alejandro Calabuig, Laura Kuhlewein, Focke Ziemssen, Arne Ohlendorf, Siegfried Wahl
Summary: The study compared retinal curvatures derived from OCT scans vs. PRX measurements, showing low correlation between the two methods. PRX tends to underestimate retinal radius, especially with increasing myopia.
JOURNAL OF CLINICAL MEDICINE
(2021)
Article
Neurosciences
Shuxian Zhang, Hui Zhang, Lihua Li, Xiaoyan Yang, Shumao Li, Xuan Li
Summary: This study found that the decentration of the treatment zone of orthokeratology lenses affects the axial length growth in adolescents. The greater the decentration, the slower the axial length growth.
FRONTIERS IN NEUROSCIENCE
(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
Ophthalmology
Xue Li, Yingying Huang, Jiali Zhang, Chenglu Ding, Yunyun Chen, Hao Chen, Jinhua Bao
Summary: The study found that greater TZ decentration with the use of OK lenses was associated with slower axial growth and a more oblate retinal shape. This type of decentration caused local defocusing changes, which may inhibit myopic progression.
OPHTHALMIC AND PHYSIOLOGICAL OPTICS
(2022)
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
Trine M. Jakobsen, Anders P. Sondergaard, Flemming Moller
Summary: This study aimed to investigate changes in peripheral and relative peripheral refraction during orthokeratology lens use in children. Results showed that orthokeratology lens wear induced significant myopic relative peripheral refraction, but only changed peripheral refraction in two eccentric measuring points. Furthermore, baseline peripheral refraction, on-axis refraction, and relative peripheral refraction at 30 degrees nasal eccentricity were correlated with treatment efficacy.
ACTA OPHTHALMOLOGICA
(2023)
Article
Multidisciplinary Sciences
Yequan Huang, Jingyun Guo, Yu Guo, Yan Cui, Zhechuang Li, Xuechuan Dong, Xiaolin Ning
Summary: This paper introduces a novel wide-angle refraction measurement method called Refraction Topography (RT), and evaluates its agreement with simulation results and expected refraction. RT utilizes a refraction algorithm on fundus images to measure refraction. Unlike traditional methods, RT requires the subject to stare at a stationary target. The study demonstrates the agreement between the test results obtained using RT, simulation results, and expected refraction on three test eyes.
SCIENTIFIC REPORTS
(2023)
Article
Biochemical Research Methods
Petros Papadogiannis, Charlie Borjeson, Linda Lundstrom
Summary: This study compares the effects of four myopia control interventions on peripheral vision and image quality. Multiple evaluation methods are needed to fully quantify the optical effects of these interventions. Perifocal has a larger variation in the effect on peripheral vision and interacts with natural optical errors. MiSight has a smaller effect on peripheral refraction but a greater effect on peripheral vision. Stellest and MiyoSmart have small effects on peripheral refraction but indicate reduced retinal contrast for all participants.
BIOMEDICAL OPTICS EXPRESS
(2023)
Article
Ophthalmology
Huibin Lv, Ziyuan Liu, Jiaxi Li, Yuexin Wang, Yulin Tseng, Xuemin Li
Summary: This study found that older age and longer lens diameter were associated with a lower rate of corneal curvature radius growth. There were differences in growth rates among different age groups.
EYE & CONTACT LENS-SCIENCE AND CLINICAL PRACTICE
(2023)
Article
Multidisciplinary Sciences
Pauline Kang, Vinod Maseedupally, Paul Gifford, Helen Swarbrick
Summary: This study aimed to characterize the changes in corneal refractive power (CRP) during orthokeratology (OK) along the principal corneal meridians. Results showed significant reductions in CRP at the central 4 mm of the cornea, while an increase in CRP was observed in the paracentral zone. The study suggests that peripheral defocus changes after OK may be greater than central corneal power reduction, and CPC power ratios could be used as an alternative method to estimate peripheral defocus.
SCIENTIFIC REPORTS
(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
Ophthalmology
Tao Li, Zhuoyi Chen, Man She, Xiaodong Zhou
Summary: The aim of this study was to investigate the relationship between relative myopic defocus (RPR) in myopic children wearing orthokeratology (OK) lenses and the growth rate of axial length (AL). The results showed that children wearing OK lenses had smaller RPR compared to those wearing single-vision glasses, and children with slower AL growth had smaller RPR. The growth rate of AL was positively correlated with RPR.
CLINICAL AND EXPERIMENTAL OPTOMETRY
(2023)
Article
Medicine, General & Internal
Antonio Queiros, Ana Amorim-de-Sousa, Paulo Fernandes, Maria Sameiro Ribeiro-Queiros, Cesar Villa-Collar, Jose M. Gonzalez-Meijome
Summary: This study aims to evaluate and develop mathematical models for estimating axial length (AL) in a cross-sectional and longitudinal sample. The existing mathematical equation proposed by Morgan was found to have statistically significant differences in AL estimation based on gender, ametropia, type of astigmatism, and age. A new mathematical model was proposed and tested, showing no statistically significant differences in axial length estimation between the models in a longitudinal sample. Despite errors in predicted axial length values, the mathematical equations are valid for estimating differences in axial increment for ages between 9 and 24 years.
JOURNAL OF CLINICAL MEDICINE
(2022)