keyword
https://read.qxmd.com/read/38514709/eye-morphometry-body-size-and-flexibility-parameters-in-myopic-adolescents
#21
JOURNAL ARTICLE
Kristina Kuoliene, Egle Danieliene, Janina Tutkuviene
The aim of this study was to investigate the anatomical and physiological ocular parameters in adolescents with myopia and to examine the relations between refractive error (SER), ocular biometry, body size and flexibility parameters in myopic adolescents. A cross-sectional study of 184 myopic adolescents, aged 15 to 19 years was conducted. Refractive error and corneal curvature measures of the eye were evaluated using an autorefractometer under cycloplegia. Central corneal thickness was determined by contact pachymetry...
March 21, 2024: Scientific Reports
https://read.qxmd.com/read/38513653/osmosis-as-nature-s-method-for-establishing-optical-alignment
#22
JOURNAL ARTICLE
Shubham Rathore, Amartya T Mitra, Ruby Hyland-Brown, Augusta Jester, John E Layne, Joshua B Benoit, Elke K Buschbeck
For eyes to maintain optimal focus, precise coordination is required between lens optics and retina position, a mechanism that in vertebrates is governed by genetics, visual feedback, and possibly intraocular pressure (IOP).1 While the underlying processes have been intensely studied in vertebrates, they remain elusive in arthropods, though visual feedback may be unimportant.2 How do arthropod eyes remain functional while undergoing substantial growth? Here, we test whether a common physiological process, osmoregulation,3 could regulate growth in the sophisticated camera-type eyes of the predatory larvae of Thermonectus marmoratus diving beetles...
March 13, 2024: Current Biology: CB
https://read.qxmd.com/read/38509142/establishing-the-profile-of-eye-diseases-among-elderly-patients-attending-a-tertiary-hospital-in-northern-malawi
#23
JOURNAL ARTICLE
Owen Banda, Thokozani Mzumara, Grace Ogbonna
Globally, there has been a dramatic increase in the geriatric population. Sadly, this populace is highly prone to develop various ocular morbidities putting pressure on the strained eye care delivery system especially in low-income countries. Hence, the aim of this study was to determine the distribution of ocular morbidities among elderly. The study was a retrospective cross-sectional study conducted at Mzuzu Central Hospital in Malawi. We retrieved data from the hospital's Ophthalmology out-patient registry from January 2021 to December 2021...
March 20, 2024: Scientific Reports
https://read.qxmd.com/read/38507595/quality-of-refractive-error-care-in-cambodia-an-unannounced-standardized-patient-study
#24
JOURNAL ARTICLE
Anthea Burnett, Ngy Meng, Do Seiha, Neath Kong, Seila Chea, Malis Dean, Piseth Horm, Kim San Meas, Beatrice Varga, Suit May Ho, Myra McGuinness, Ling Lee
PURPOSE: Quality-of-care in refractive error services is essential, as it directly affects vision outcomes, wellbeing, educational attainment, and workforce participation. In Cambodia, uncorrected refractive error is a leading cause of mild and moderate vision impairment in adults. We evaluated the quality of refractive error care in Cambodia by estimating the proportion of prescribed and dispensed spectacles appropriate for people's refractive error needs and factors associated with spectacle quality...
March 20, 2024: Ophthalmic Epidemiology
https://read.qxmd.com/read/38507190/accuracy-of-ten-intraocular-lens-formulas-in-spherical-equivalent-of-toric-intraocular-lens-power-calculation
#25
JOURNAL ARTICLE
Jingyi Shi, Zehui Zhu, Bin Hu, Shuyi Qian, Yalan Wang, Pingjun Chang, Yun-E Zhao
INTRODUCTION: The aim of this work is to evaluate the accuracy of the Barrett Universal II (BU II), Emmetropia verifying optical (EVO) 2.0, Haigis, Hoffer Q, Hoffer QST (Savini/Taroni) (HQST), Holladay 1, Kane, Ladas Super, Sanders-Retzlaff-Kraff/theoretical (SRK/T), and T2 intraocular lens (IOL) power formulas for calculating spherical equivalent (SE) of toric IOL. METHODS: This study enrolled consecutive patients who underwent phacoemulsification and toric IOL implantation at the Eye Hospital of Wenzhou Medical University in Hangzhou from 2015 to 2022...
March 20, 2024: Ophthalmology and Therapy
https://read.qxmd.com/read/38506096/surrogate-optimisation-strategies-for-intraocular-lens-formula-constant-optimisation
#26
JOURNAL ARTICLE
Achim Langenbucher, Jascha Wendelstein, Alan Cayless, Peter Hoffmann, Nóra Szentmáry
PURPOSE: To investigate surrogate optimisation (SO) as a modern, purely data-driven, nonlinear adaptive iterative strategy for lens formula constant optimisation in intraocular lens power calculation. METHODS: A SO algorithm was implemented for optimising the root mean squared formula prediction error (rmsPE, defined as predicted refraction minus achieved refraction) for the SRKT, Hoffer Q, Holladay, Haigis and Castrop formulae in a dataset of N = 888 cataractous eyes with implantation of the Hoya Vivinex hydrophobic acrylic aspheric lens...
March 20, 2024: Acta Ophthalmologica
https://read.qxmd.com/read/38504505/detection-of-significant-vision-conditions-in-children-using-quicksee-wavefront-autorefractor
#27
JOURNAL ARTICLE
Anh Bui, G Lynn Mitchell, Catherine McDaniel, Ann Morrison, Andrew Toole, Michelle Buckland, Marjean T Kulp
PURPOSE: This study evaluated the ability of QuickSee to detect children at risk for significant vision conditions (significant refractive error [RE], amblyopia and strabismus). METHODS: Non-cycloplegic refraction (using QuickSee without and with +2 dioptre (D) fogging lenses) and unaided binocular near visual acuity (VA) were measured in 4- to 12-year-old children. Eye examination findings (VA, cover testing and cycloplegic retinoscopy) were used to determine the presence of vision conditions...
March 19, 2024: Ophthalmic & Physiological Optics: the Journal of the British College of Ophthalmic Opticians (Optometrists)
https://read.qxmd.com/read/38503665/altering-optical-zone-diameter-reverse-curve-width-and-compression-factor-impacts-on-visual-performance-and-axial-elongation-in-orthokeratology
#28
JOURNAL ARTICLE
Jinfang Wu, Xinyu Zhang, Linlin Wang, Peipei Zhang, Xi Guo, Peiying Xie
PURPOSE: To investigate the effects of modifications in back optical zone diameter (BOZD), reverse curve width (RCW), and compression factor (CF) on refractive error changes and axial elongation in myopic children undergoing orthokeratology (ortho-k) over a 12-month period. METHOD: In this retrospective study, data from 126 myopic children undergoing ortho-k fitting were analyzed. Subjects were categorized into four distinct groups based on lens design parameters: Group A (BOZD 6...
March 18, 2024: Contact Lens & Anterior Eye: the Journal of the British Contact Lens Association
https://read.qxmd.com/read/38499845/skeletal-expansion-via-craniofacial-distraction-osteogenesis-technique-in-syndromic-craniosynostosis-impact-on-ophthalmic-parameters
#29
JOURNAL ARTICLE
Lim Chin Kai, Nurliza Khaliddin, Muhammad Kamil Hassan, Firdaus Hariri
BACKGROUND: This study aims to compare the changes in ophthalmic parameters among syndromic craniosynostosis patients who underwent craniofacial skeletal expansion procedures via distraction osteogenesis (DO). METHOD: A retrospective study was conducted involving syndromic craniosynostosis patients who underwent surgical expansion via the DO technique from the year 2012 to March 2022. Changes in six parameters which consist of visual acuity, refractive error, optic disc health, intraocular pressure, degree of proptosis and orbital volume were measured objectively pre and post-surgery...
March 19, 2024: International Ophthalmology
https://read.qxmd.com/read/38497836/development-of-a-multi-stage-fog-droplet-screening-system-based-on-the-virtual-impact-principle
#30
JOURNAL ARTICLE
Liansi Sun, Yin Cheng, Jiaoshi Zhang, Dexia Wu, Jie Wang, Yixin Yang, Huaqiao Gui
Accurately measuring fog droplet spectra is essential for understanding fog's formation, dissipation, and composition, which makes a challenge to the performance of droplet sampling and measurement systems. Standard particles such as glass beads are widely used to characterize their performance. However, the disparities between glass beads and fog droplets, including refractivity, size distribution, and composition, may lead to calibration errors. In this context, we developed a three-stage fog droplet screening system based on the virtual impact principle...
March 1, 2024: Review of Scientific Instruments
https://read.qxmd.com/read/38495805/bilateral-iris-coloboma-in-an-11-year-old-child-with-low-vision-and-high-intraocular-pressure-a-rare-case-report-and-review-of-literature
#31
Tawfiq Ahmad Mushkani, Zabih Ur Rahman Roheen
BACKGROUND: Coloboma means curtailed in Greek language. It is mainly used when normal tissue of the eye or another organ is not present since birth. Coloboma is a congenital abnormality mainly caused by incomplete closure of the embryonic fissure of the choroid part of eye. PURPOSE: The aim of this case report is to share the clinical findings in a patient with bilateral iris coloboma, low vision, and headache. PATIENTS AND METHODS: Case report...
2024: International Medical Case Reports Journal
https://read.qxmd.com/read/38495697/comparison-of-modal-and-zonal-wavefront-measurements-of-refractive-extended-depth-of-focus-intraocular-lenses
#32
JOURNAL ARTICLE
Seung Pil Bang, HaeWon Jung, Kaccie Y Li, Geunyoung Yoon
Extended depth-of-focus (EDoF) intraocular lenses (IOLs) are typically evaluated using commercially available aberrometers. Given the intricate optical design of these IOLs, employing an appropriate wavefront reconstruction method with a sufficient sampling resolution of the aberrometer is crucial. A high-resolution Shack-Hartmann wavefront sensor was developed by magnifying the pupil aperture by a factor of five onto a lenslet array (pitch: 133 µm) and utilizing a full-frame CMOS sensor (24 by 36 mm), resulting in a 26...
March 1, 2024: Biomedical Optics Express
https://read.qxmd.com/read/38494492/development-and-validation-of-predictive-models-for-myopia-onset-and-progression-using-extensive-15-year-refractive-data-in-children-and-adolescents
#33
REVIEW
Jing Zhao, Yanze Yu, Yiming Li, Feng Li, Zhe Zhang, Weijun Jian, Zhi Chen, Yang Shen, Xiaoying Wang, Zhengqiang Ye, Chencui Huang, Xingtao Zhou
BACKGROUND: Global myopia prevalence poses a substantial public health burden with vision-threatening complications, necessitating effective prevention and control strategies. Precise prediction of spherical equivalent (SE), myopia, and high myopia onset is vital for proactive clinical interventions. METHODS: We reviewed electronic medical records of pediatric and adolescent patients who underwent cycloplegic refraction measurements at the Eye & Ear, Nose, and Throat Hospital of Fudan University between January 2005 and December 2019...
March 17, 2024: Journal of Translational Medicine
https://read.qxmd.com/read/38488409/understanding-accommodative-control-in-the-clinic-modeling-latency-and-amplitude-for-uncorrected-refractive-error-presbyopia-and-cycloplegia
#34
JOURNAL ARTICLE
Jenny C A Read, Gerrit Maus, Clifton M Schor
Accommodation is the process of adjusting the eye's optical power so as to focus at different distances. Uncorrected refractive error and/or functional presbyopia mean that sharp focus may not be achievable for some distances, so observers experience sustained defocus. Here, we identify a problem with current models of accommodative control: They predict excessive internal responses to stimuli outside accommodative range, leading to unrealistic adaptation effects. Specifically, after prolonged exposure to stimuli outside range, current models predict long latencies in the accommodative response to stimuli within range, as well as unrealistic dynamics and amplitudes of accommodative vergence innervation driven by the accommodative neural controller...
March 1, 2024: Journal of Vision
https://read.qxmd.com/read/38481203/prevalence-and-risk-factors-for-astigmatism-in-7-to-19-year-old-students-in-xinjiang-china-a-cross-sectional-study
#35
JOURNAL ARTICLE
Yan Wang, Jingyu Mu, Yining Yang, Xiaolong Li, Han Qin, Batima Mulati, Zhen Wang, Wei Gong, Yong Zhao, Yunxian Gao
BACKGROUND: To investigate the prevalence and risk factors for astigmatism in 7-19-year-old students in Xinjiang, China. METHODS: A school-based, cross-sectional study was conducted on students who underwent refraction examination in Xinjiang, China, between May and December 2019. The prevalence of astigmatism was determined. Astigmatism was defined as cylinder power (C) ≤-0.75 D, undefined astigmatism as ≤-1.50 D, and high astigmatism as C ≤-3...
March 13, 2024: BMC Ophthalmology
https://read.qxmd.com/read/38481176/long-term-outcomes-of-anti-vascular-endothelial-growth-factor-therapy-with-and-without-posterior-scleral-reinforcement-on-myopic-maculopathy-in-myopic-choroidal-neovascularization-eyes
#36
JOURNAL ARTICLE
Meng-Tian Kang, Ningli Wang, Wenjun Xu, Mayinuer Yusufu, Wu Liu, Jiaxin Tian, Yue Qi
BACKGROUND: Anti-vascular endothelial growth factor (anti-VEGF) therapy is used for myopic choroidal neovascularization (mCNV). Patchy chorioretinal atrophy (pCRA) enlargement has been reported in mCNV cases associated with vision loss. Our aim was to compare the long-term effectiveness of anti-VEGF therapy alone versus anti-VEGF followed by posterior scleral reinforcement (PSR) in controlling myopic maculopathy in mCNV eyes. METHODS: We performed a retrospective review of the medical records of 95 high myopia patients (refractive error ≥ 6...
March 13, 2024: BMC Ophthalmology
https://read.qxmd.com/read/38479117/maximal-aerobic-exercise-and-acute-visual-performance-in-females-implications-for-concussion-side-line-testing
#37
JOURNAL ARTICLE
Brandon S Shaw, Gerrit Breukelman, Lourens Millard, Jason Moran, Gavin Sandercock, Ina Shaw
PURPOSE: Many sports-related concussion (SRC) outcomes can be prevented by removing affected athletes and allowing return after full recovery. Diagnosing concussions on the side-line is challenging, as tools often rely on visual performance assessment. Since acute exercise can affect vision, it is vital to determine if exercise can mask potential brain injury if visual performance assessments are used. The aim of this study was to determine the effect of a single bout of maximal aerobic exercise on acute visual performance...
March 12, 2024: Journal of Optometry
https://read.qxmd.com/read/38472953/advances-in-transepithelial-photorefractive-keratectomy-versus-laser-assisted-in-situ-keratomileusis
#38
JOURNAL ARTICLE
Paul Filip Curcă, Cătălina Ioana Tătaru, George Sima, Marian Burcea, Călin Petru Tătaru
(1) Background: Laser-assisted refractive surgery is a safe and effective surgical correction of refractive error. For most patients, both the newer Trans-PRK and the established LASIK technique can produce the required surgical correction, sparking the question of which technique should be opted for. (2) Methods: The study prospectively evaluated 121 patients (230 eyes) for at least one month postoperatively; 66 patients (126 eyes) and 45 patients (85 eyes) returned for 6 months and 1 year follow-up. (3) Results: No statistical difference was recorded at 1 week or 1 month post-operation...
February 23, 2024: Diagnostics
https://read.qxmd.com/read/38466761/camellin-calossi-formula-for-intraocular-lens-power-calculation-in-patients-with-previous-myopic-laser-vision-correction
#39
JOURNAL ARTICLE
Piero Zollet, Maria Angela Romeo, Domenico Tripepi, Paolo Vinciguerra, Riccardo Vinciguerra
PURPOSE: To assess the performance of the Camellin-Calossi formula in eyes with prior myopic laser vision correction. METHODS: This was a retrospective case series. Patients included had a history of uncomplicated myopic laser vision correction and cataract surgery. The primary outcome measures were cumulative distribution of absolute refractive prediction error, absolute refractive prediction error, and refractive prediction error. These parameters were estimated post-hoc using the Camellin-Calossi, Shammas, Haigis-L, Barrett True-K with or without history, Masket, and Modified Masket formulas and their averages starting from biometric data, clinical records, postoperative refraction, and intraocular lens power implanted...
March 2024: Journal of Refractive Surgery
https://read.qxmd.com/read/38462377/-peripheral-sterile-corneal-infiltrates-after-small-incision-lenticule-extraction
#40
JOURNAL ARTICLE
D Chen, Z H Wang, X W Liu, Y Li
A 31-year-old female patient with refractive error in both eyes underwent small incision lenticule extraction. On the 4th day after surgery, arc-shaped peripheral corneal infiltrates appeared in the right eye. Tobramycin and dexamethasone eye drops, 0.3% gatifloxacin eye drops, and a corneal bandage lens were applied to the eye. After bacterial infection was ruled out, dexamethasone sodium phosphate was injected subconjunctivally near the corneal lesion. The symptoms improved and the corneal lesion subsided afterwards...
March 11, 2024: [Zhonghua Yan Ke za Zhi] Chinese Journal of Ophthalmology
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