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Refractive errors

Kyoung Lae Kim, Youn Joo Choi, Seong Hwan Shin, Sung Pyo Park, Yong-Kyu Kim
PURPOSE: To investigate the serial choroidal volume change following orbital blow-out fracture (BOF) repair. METHODS: The choroidal volume was measured by optical coherence tomography in patients who underwent BOF repair, preoperatively and postoperatively at 1, 4, 12 and 24 weeks. The orbital volume ratio (OVR) was obtained by dividing the orbital volume of the traumatized orbit by that of the contralateral side using three-dimensional computed tomography imaging...
October 19, 2018: International Ophthalmology
Fady Sedarous, Helen Dimaras, Maram Isaac, Myrna Lichter, Nasrin N Tehrani
OBJECTIVE: To assess the ophthalmic needs of families with children residing in Toronto shelters. DESIGN: Cross-sectional study. PARTICIPANTS: Forty-nine families, including 86 children (age 0-16 years) and 55 adult and youth family members (AYFM) (age >16 years), randomly selected from 5 family shelters in Toronto, Ont. METHODS: Ten families with at least 1 child aged 16 years or younger were randomly recruited from each shelter...
October 2018: Canadian Journal of Ophthalmology. Journal Canadien D'ophtalmologie
Hyo Kyung Lee, Mee Kum Kim
BACKGROUND: The purpose of this study is to compare the biometric parameters and intraocular lens (IOL) power calculation by a new swept-source optical coherence tomography (SS-OCT) biometer with those by a partial coherence interferometry (PCI) biometer. METHODS: Medical records of 175 eyes from 175 patients were retrospectively reviewed. One of two monofocal IOLs (Tecnis ZCB00 or Acrysof SA60AT) were implanted in the eyes. Axial length (AL), mean keratometry (Km), J0, J45 and anterior chamber depth (ACD) were compared between PCI and SS-OCT biometers...
October 19, 2018: BMC Ophthalmology
Donald O Mutti, Loraine T Sinnott, G Lynn Mitchell, Lisa A Jordan, Nina E Friedman, Sara L Frane, Wendy K Lin
SIGNIFICANCE: The study fills an important gap by providing a longitudinal description of development of the major structural and optical components of the human eye from 3 months to nearly 7 years of age. Normative development data may provide insights into mechanisms for emmetropization and guidance on intraocular lens power calculation. PURPOSE: The purpose of this study was to describe the pattern of development of refractive error and the ocular components from infancy through early childhood...
October 18, 2018: Optometry and Vision Science: Official Publication of the American Academy of Optometry
Maja Bohac, Mateja Koncarevic, Adrijana Dukic, Alma Biscevic, Vesna Cerovic, Maja Merlak, Nikica Gabric, Sudi Patel
SIGNIFICANCE: Small incision lenticule extraction (SMILE) is advanced as the most minimally invasive and least traumatic corneal procedure for correcting refractive errors using a single laser. Although SMILE obtains similar results to femtosecond laser in situ keratomileusis (LASIK) with spherical myopia, it has deficiencies in astigmatism correction. PURPOSE: The purpose of this study was to compare refractive outcomes and high-order aberrations (HOAs) between SMILE and femtosecond LASIK corneal procedures at 1 year post-operative...
October 18, 2018: Optometry and Vision Science: Official Publication of the American Academy of Optometry
Johannes Menzel-Severing, Ralph Meiller, Cornelia Kraus, Regina Trollmann, Deniz Atalay
We report the case of a 3-year-old boy presenting with bilateral keratoglobus and blue sclera in addition to hallux valgus, arachnodactyly, small joint hypermobility, mitral valve dysfunction and a history of generalized muscular hypotonia in early infancy. Molecular genetics provided evidence of two pathogenic mutations in the ZNF469 gene (compound heterozygosity) leading to the diagnosis of brittle cornea syndrome type 1. In addition to neuropediatric care, spectacles were prescribed to correct refractive error and for ocular protection...
October 18, 2018: Der Ophthalmologe: Zeitschrift der Deutschen Ophthalmologischen Gesellschaft
April Meier, Ralph Nelson, Victoria P Connaughton
Zebrafish ( Danio rerio ) is a model organism for vertebrate developmental processes and, through a variety of mutant and transgenic lines, various diseases and their complications. Some of these diseases relate to proper function of the visual system. In the US, the National Eye Institute indicates >140 million people over the age of 40 have some form of visual impairment. The causes of the impairments range from refractive error to cataract, diabetic retinopathy and glaucoma, plus heritable diseases such as retinitis pigmentosa and color vision deficits...
2018: Frontiers in Cellular Neuroscience
Ke Xu, Hong Qi, Rongmei Peng, Gege Xiao, Jing Hong, Yansheng Hao, Boping Ma
BACKGROUND: To compare different K readings in pseudophakic patients post-Descemet's stripping automated endothelial keratoplasty (DSAEK) and evaluate corresponding prediction errors in intraocular lens (IOL) power calculations. METHODS: Subjects that underwent cataract surgery and DSAEK surgery at least 3 and 6 months prior, respectively, and IOL implantation in the capsular bag were included in this study. Manifest refraction and IOL information were recorded...
October 17, 2018: BMC Ophthalmology
Shin Yeop Oh, Kyung-Ah Park, Sei Yeul Oh
PURPOSE: We investigated the clinical and demographic factors associated with horizontal muscle reoperation due to recurrent esotropia or consecutive exotropia in infantile esotropia. METHODS: One hundred forty-two patients with infantile esotropia who received at least 3 years of follow-up after their first surgery between January 2004 and December 2012 were included in this study. The patients were divided into 2 groups according to the reoperation, and the reoperation group was further subdivided into 2 groups [recurrent esotropia (RET) and consecutive exotropia (CXT)]...
October 17, 2018: Japanese Journal of Ophthalmology
Amir Nassri, Elisabeth Singer, Nicole Olschewski, Oktay Temiz, Mohammed Abujarad, Abed Atili
OBJECTIVE: Bilateral medial rectus recession (BMR) is a common surgical treatment of infantile esotropia with smaller and larger deviations. The aim of this study is to evaluate the dose-effect relationship and the success of the therapy. DESIGN: The study is a retrospective, monocentric clinical study with one surgeon and 60 patients with infantile esotropia. METHODS: 60 patients with infantile esotropia were included, who were treated with BMR using microinvasive technique between April 2012 and September 2015...
October 2018: Klinische Monatsblätter Für Augenheilkunde
Virginie Naël, Gwendoline Moreau, Solène Monfermé, Audrey Cougnard-Grégoire, Anne-Catherine Scherlen, Angelo Arleo, Jean-François Korobelnik, Cécile Delcourt, Catherine Helmer
Importance: Uncorrected refractive error (URE) is a common cause of visual impairment, but its prevalence in groups of older adults who could be pragmatic targets for improving optical correction remains unknown. Objectives: To estimate the prevalence of URE in older adults, particularly in those with age-related eye disease and those who are unable to attend an outpatient clinic, and to identify the factors associated with URE. Design, Setting, and Participants: This population-based cross-sectional analysis included 707 adults 78 years or older from the Alienor Study in Bordeaux, France...
September 20, 2018: JAMA Ophthalmology
Chen-Wei Pan, Ou Zhang, Dan-Ning Hu, Rong-Kun Wu, Jun Li, Hua Zhong, Min Hu
Purpose: We aimed to determine the association of iris color with lens thickness (LT) in a school-based sample of Chinese teenagers. Methods: In total, 2346 grade 7 students, from 10 middle schools, aged 13 to 14 years in Mojiang located in Southwestern China were included in the analysis. A grading system was developed to assess iris color based on standardized slit-lamp photographs. LT was measured by the LenStar LS900. Refractive error was measured after cycloplegia using an autorefractor and ocular biometric parameters, including axial length (AL), were measured using an IOL Master...
September 2018: Translational Vision Science & Technology
Apatsa Lekskul, Pichaya Chuephanich, Chao Charoenkijkajorn
Purpose: To evaluate the postoperative refraction of intended undercorrection after intraocular lens (IOL) implantation in pediatric cataract patients. Design: A cross-sectional study (data collected by retrospective chart review). Patients and methods: The medical records of children aged under 10 years, who underwent cataract surgery with IOL implantation at the Ramathibodi Hospital between January 2000 and May 2018, were reviewed. IOL power calculations were 30%, 25%, 20%, 15% and 10% under-corrected if children were aged 6-12, 13-24, 25-36, 37-48 and 49-60 months, respectively...
2018: Clinical Ophthalmology
Ahmad M Mansour, Michael W Stewart, Salma W Yassine, Carl-Joe Z Mehanna, Antonio Marcelo B Casella, Rola N Hamam, Jay Chhablani, Luiz H Lima, Ari Shinojima, Hiroyuki Kaneko, Muhammad H Younis, Hasan K Shahin, Subhadra Jalali, Cem Kucukerdonmez, Ali O Saatci, Renuka Chakurkar, Carol L Shields
AIM: To study the macular structure and vasculature in consecutive nanophthalmic eyes using optical coherence tomography angiography. METHODS: This is a prospective, multicentre, cross-sectional study of patients with nanophthalmos (one or both eyes). The superficial and deep foveal avascular zones (FAZ) were measured both manually and with the machine's built-in automated measurement tool. Correlations between best corrected visual acuity (BCVA), central macular thickness (CMT) and subfoveolar choroidal thickness (SFCT) were calculated...
October 15, 2018: British Journal of Ophthalmology
Jennifer S Harthan, Ellen Shorter
Scleral lenses are being prescribed for the management of corneal irregularity, uncomplicated refractive error, and ocular surface disease. There are many potential therapeutic uses of scleral lenses in addition to providing similar benefits as corneal gas permeable lenses. Scleral contact lenses are a valuable therapeutic tool for patients with ocular surface disease as these lenses protect the ocular surface, provide continuous corneal hydration while providing optimal visual correction, and are often used in conjunction with other therapies...
2018: Clinical optometry
Ayisha Kausar, Nadia Akhtar, Farooq Afzal, Khalid Ali
OBJECTIVE: To evaluate the effect of refractive error and axial length on peripapillary retinal nerve fibre layer thickness in myopic, hypermetropic and emmetropic eyes by Topcon spectral domain optical coherence tomography. METHODS: This cross-sectional study was conducted at the ophthalmology clinic of Shifa Foundation Falahee Clinic, Islamabad, Pakistan, from January to December 2016, and comprised eye patients including emmetropes, hypermetropes and myopes. All participants underwent detailed ophthalmic examination including axial lengths measurements, auto refraction andretinal nerve fibre layer thickness analysis...
July 2018: JPMA. the Journal of the Pakistan Medical Association
Sanjay Kalra, Rishi Raj Singh
Optometric or visual acuity assessment is an essential part of ophthalmologic examination. Visual acuity measurement serves as a tool for screening of ophthalmic disorders, as well as diagnosis and monitoring of refractive errors and other causes of reduced acuity. Persons with diabetes may experience situations which impair visual acuity, or which impact the utility of refractive visual acuity assessment. This communication shares guidance as to when and when not to perform visual acuity charting in persons with diabetes...
September 2018: JPMA. the Journal of the Pakistan Medical Association
Ali Demircan, Ceren Yesilkaya, Cigdem Altan, Zeynep Alkin, Dilek Yasa, Ebru Demet Aygit, Damla Bektasoglu
PURPOSE: To compare the area of the superficial foveal avascular zone (SFAZ) and deep foveal avascular zone (DFAZ) between patients with nanophthalmos and age matched controls. METHODS: This prospective and comparative study included 19 eyes from 11 patients with nanophthalmos (study group) and 19 eyes from 19 healthy subjects (control group). SFAZ and DFAZ were measured with optical coherence tomography angiography (OCT-A). All participants underwent a standardised ocular examination including best corrected visual acuity (BCVA), central macular thickness (CMT), subfoveal choroidal thickness (SFCT) anterior chamber depth (ACD), axial length (AL), and refractive error (RE) measurements...
October 12, 2018: Eye
Siofra Christine Harrington, Jim Stack, Kathryn Saunders, Veronica O'Dwyer
AIM: To report refractive error prevalence and visual impairment in Republic of Ireland (henceforth 'Ireland') schoolchildren. METHODS: The Ireland Eye Study examined 1626 participants (881 boys, 745 girls) in two age groups, 6-7 years (728) and 12-13 years (898), in Ireland between June 2016 and January 2018. Participating schools were selected by stratified random sampling, representing a mix of school type (primary/postprimary), location (urban/rural) and socioeconomic status (disadvantaged/advantaged)...
October 12, 2018: British Journal of Ophthalmology
Woo Keun Song, Kyung Rim Sung, Joong Won Shin, Junki Kwon
PURPOSE: To identify the preoperative biometric factors, including subfoveal choroidal thickness (CT), associated with refractive outcome after cataract surgery in eyes with primary angle closure (PAC). METHODS: This study included 50 eyes of 50 PAC patients who underwent uneventful cataract surgery. Preoperatively, anterior segment parameters including anterior chamber depth (ACD) and lens vault were determined by anterior segment optical coherence tomography. Subfoveal CT was measured by spectral domain optical coherence tomography enhanced depth imaging before and at one month after surgery...
October 2018: Korean Journal of Ophthalmology: KJO
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