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Uncorrected refractive error

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https://www.readbyqxmd.com/read/28732613/photorefractive-intrastromal-corneal-crosslinking-for-the-treatment-of-myopic-refractive-errors-six-month-interim-findings
#1
Matthias Elling, Inga Kersten-Gomez, H Burkhard Dick
PURPOSE: To evaluate the safety and efficacy of photorefractive intrastromal corneal crosslinking (CXL) in low myopia. SETTING: Ruhr University Eye Hospital, Bochum, Germany. DESIGN: Prospective case series. METHODS: Healthy eyes with myopia or myopic astigmatism had photorefractive intrastromal CXL using the Mosaic system to apply ultraviolet-A (UVA) 365 nm (30 mW/cm(2)) irradiance (total calculated UVA dose of 10 J/cm(2) or 15 J/cm(2)) with riboflavin 0...
June 2017: Journal of Cataract and Refractive Surgery
https://www.readbyqxmd.com/read/28728283/-epidemiological-survey-of-visual-impairment-in-funing-county-jiangsu
#2
M Yang, J F Zhang, R R Zhu, L H Kang, B Qin, H J Guan
Objective: To investigate the prevalence of visual impairment and factors associated with visual impairment among people aged 50 years and above in Funing County, Jiangsu Province. Methods: Cross-sectional study. Random cluster sampling was used in selecting individuals aged ≥50 years in 30 clusters, and 5 947 individuals received visual acuity testing and eye examination. Stata 13.0 software was used to analyze the data. Multivariate logistic regression was used to detect possible factors of visual impairment such as age, gender and education...
July 11, 2017: [Zhonghua Yan Ke za Zhi] Chinese Journal of Ophthalmology
https://www.readbyqxmd.com/read/28721935/prevalence-of-eye-disease-and-visual-impairment-in-%C3%A3-le-de-la-gonave-ha%C3%A3-ti
#3
B Tousignant, J Brûlé
Epidemiological data describing the prevalence of blindness and visual impairment in Haiti are sparse. The Haitian National Committee for the Prevention of Blindness (CNPC) estimates the prevalence of blindness at 1 %. Other regional data estimate moderate and severe visual impairment at 5% and 22%, respectively. IRIS Mundial (IM) is a non-governmental organization collaborating with the CNPC to develop eye care infrastructure in Haiti. To estimate the prevalence and causes of blindness and visual impairment on the Haitian island of Gonâve, to assist in planning of relevant eye care infrastructure...
July 19, 2017: Médecine et Santé Tropicales
https://www.readbyqxmd.com/read/28721004/epithelium-on-photorefractive-intrastromal-cross-linking-pixl-for-reduction-of-low-myopia
#4
Wee Kiak Lim, Zhi Da Soh, Harold Kah Yen Choi, Julian Thiam Siew Theng
PURPOSE: To report the 9-12-month outcomes of a novel procedure for reduction of low myopia through epithelium-on photorefractive intrastromal cross-linking (PiXL) with customized control of topographic distribution of ultraviolet (UV)-fluence. METHOD: Myopic patients with normal (non-ectatic) corneas underwent the PiXL procedure for reduction of low myopia. PiXL treatments were delivered through selective application of UVA light based on the refractive error of each patient...
2017: Clinical Ophthalmology
https://www.readbyqxmd.com/read/28712892/discontinuation-of-long-term-orthokeratology-lens-wear-and-subsequent-refractive-surgery-outcome
#5
Pauline Kang, Helen Swarbrick
PURPOSE: To report a case of lens discontinuation in a long term orthokeratology (OK) lens wearer and describe regression in refraction, corneal topography, and corneal thickness over 408days after lens discontinuation. Furthermore, the outcome of subsequent LASIK treatment is also reported. CASE REPORT: A 41year old Caucasian female who had been previously wearing OK lenses for 13 years discontinued lens wear in the left eye to consider refractive surgery in that eye...
July 13, 2017: Contact Lens & Anterior Eye: the Journal of the British Contact Lens Association
https://www.readbyqxmd.com/read/28702951/the-prevalence-of-refractive-errors-among-adult-rural-populations-in-iran
#6
Hassan Hashemi, Payam Nabovati, Abbasali Yekta, Fereshteh Shokrollahzadeh, Mehdi Khabazkhoob
PURPOSE: The aim was to determine the prevalence of myopia and hyperopia and related factors in underserved rural areas in Iran. METHODS: Under random cluster sampling, two rural regions were randomly selected in the north and southwest of the country, and 3,061 persons over 15 years of age were invited into the study. After selecting samples, all participants had refraction, measurement of uncorrected vision and visual acuity and ocular health examination by slitlamp biomicroscopy...
July 12, 2017: Clinical & Experimental Optometry: Journal of the Australian Optometrical Association
https://www.readbyqxmd.com/read/28694342/normative-visual-acuity-in-chinese-preschoolers-aged-36-to-48-months-as-measured-with-the-linear-hotv-chart-the-yuhuatai-pediatric-eye-disease-study
#7
Hui Zhu, Dan Huang, Qigang Sun, Hui Ding, Jing Bai, Ji Chen, Xuejuan Chen, Yue Wang, Xiaohan Zhang, Jing Wang, Xinying Li, Hu Liu
OBJECTIVES: To document population-based normative data for uncorrected visual acuity (UCVA) in Chinese preschoolers aged 36 to <48 months without any sight-affecting abnormalities and to evaluate its effectiveness for vision referral. METHODS: In a population-based cohort of children in the Yuhuatai Pediatric Eye Disease Study, UCVA was measured by using the linear HOTV chart, followed by other ocular examinations. Reference population was defined as children without ophthalmic abnormalities or refractive error...
July 9, 2017: BMJ Open
https://www.readbyqxmd.com/read/28689897/the-prevalence-and-causes-of-vision-loss-in-indigenous-and-non-indigenous-australians-the-national-eye-health-survey
#8
Joshua Foreman, Jing Xie, Stuart Keel, Peter van Wijngaarden, Sukhpal Singh Sandhu, Ghee Soon Ang, Jennifer Fan Gaskin, Jonathan Crowston, Rupert Bourne, Hugh R Taylor, Mohamed Dirani
PURPOSE: To conduct a nationwide survey on the prevalence and causes of vision loss in Indigenous and non-Indigenous Australians. DESIGN: Nationwide, cross-sectional, population-based survey. PARTICIPANTS: Indigenous Australians aged 40 years or older and non-Indigenous Australians aged 50 years and older. METHODS: Multistage random-cluster sampling was used to select 3098 non-Indigenous Australians and 1738 Indigenous Australians from 30 sites across 5 remoteness strata (response rate of 71...
July 6, 2017: Ophthalmology
https://www.readbyqxmd.com/read/28643717/spectacles-use-in-a-rural-population-in-the-state-of-telangana-in-south-india
#9
Srinivas Marmamula, Rohit C Khanna, Eswararao Kunuku, Gullapalli N Rao
CONTEXT: Uncorrected refractive errors are the leading cause of visual impairment. AIMS: To assess the prevalence and patterns of spectacles use among those aged ≥40 years in the South Indian state of Telangana. SETTINGS AND DESIGN: This was a population-based, cross-sectional study, in which 6150 people were enumerated from 123 clusters in the two districts of Telangana state (Adilabad and Mahbubnagar) using a two-stage cluster random sampling methodology...
June 2017: Indian Journal of Ophthalmology
https://www.readbyqxmd.com/read/28639449/-optic-properties-of-myopic-correction-by-orthokeratology-contact-lenses-a-case-report
#10
M Mýlková, F Pluháček
INTRODUCTION: Orthokeratology lenses present a special type of hard contact lenses, which is used especially for myopic correction. The lenses are applied during the night, when thanks to their special shape cause temporally (reversible) change of the cornea shape. During the day, there is not necessary to wear any other refractive correction. Due to the wearing regimen, there is, comparing to the classical contact lenses, higher risk of health complications. For their safe use, it is necessary to pay attention to the application of lenses of adequate parameters, follow up the care and hygiene precautions, regular controls and early treatment of possible problems...
2017: Ceská a Slovenská Oftalmologie
https://www.readbyqxmd.com/read/28622398/axial-length-variation-impacts-on-superficial-retinal-vessel-density-and-foveal-avascular-zone-area-measurements-using-optical-coherence-tomography-angiography
#11
Danuta M Sampson, Peijun Gong, Di An, Moreno Menghini, Alex Hansen, David A Mackey, David D Sampson, Fred K Chen
Purpose: To evaluate the impact of image magnification correction on superficial retinal vessel density (SRVD) and foveal avascular zone area (FAZA) measurements using optical coherence tomography angiography (OCTA). Methods: Participants with healthy retinas were recruited for ocular biometry, refraction, and RTVue XR Avanti OCTA imaging with the 3 × 3-mm protocol. The foveal and parafoveal SRVD and FAZA were quantified with custom software before and after correction for magnification error using the Littman and the modified Bennett formulae...
June 1, 2017: Investigative Ophthalmology & Visual Science
https://www.readbyqxmd.com/read/28586500/implantation-of-implantable-collamer-lenses-after-radial-keratotomy
#12
Bárbara Martín-Escuer, José F Alfonso, José J Esteve-Taboada, Luis Fernández-Vega Cueto, Robert Montés-Micó
PURPOSE: To assess the predictability, efficacy, and safety of posterior chamber phakic implantable collamer lens (ICL) implantation after radial keratotomy. METHODS: In a retrospective non-comparative interventional case series, outcomes in 6 consecutive eyes of 4 patients with residual refraction after radial keratotomy were analyzed after the implantation of ICLs. All of the lenses were implanted to correct the residual refractive error, ranging from -12.00 to +3...
June 1, 2017: Journal of Refractive Surgery
https://www.readbyqxmd.com/read/28538337/developing-a-logarithmic-chinese-reading-acuity-chart
#13
Qi-Ming Han, Lin-Juan Cong, Cong Yu, Lei Liu
PURPOSE: An individual's reading ability cannot be reliably predicted from his/her letter acuity, contrast sensitivity, and visual field extent. We developed a set of Chinese reading acuity charts (C-READ) to assess the reading ability of Chinese readers, based on the collective wisdom of previously published reading acuity charts, especially the MNRead and the Radner Reading Charts. METHODS: The C-READ consists of three charts. Each consists sixteen 12-character simplified Chinese sentences crafted from first- to third-grade textbooks...
June 2017: Optometry and Vision Science: Official Publication of the American Academy of Optometry
https://www.readbyqxmd.com/read/28520882/ocular-determinants-of-refractive-error-and-its-age-and-sex-related-variations-in-the-chinese-american-eye-study
#14
Grace M Richter, Mingwu Wang, Xuejuan Jiang, Shuang Wu, Dandan Wang, Mina Torres, Farzana Choudhury, Rohit Varma
Importance: Uncorrected refractive error (RE) is a leading cause of visual impairment, and variations in ocular anatomy determine RE. The unique ocular determinants of RE in Chinese American individuals have not been studied previously. Objective: To report ocular determinants of RE in a Chinese American population 50 years and older in Monterey Park, California. Design, Setting, and Participants: The Chinese American Eye Study, a population-based, cross-sectional study, was conducted from February 1, 2010, through October 31, 2013, in Monterey Park, with this particular data analysis performed from January 1 through December 31, 2016...
July 1, 2017: JAMA Ophthalmology
https://www.readbyqxmd.com/read/28514829/does-hofstetter-s-equation-predict-the-real-amplitude-of-accommodation-in-children
#15
Hassan Hashemi, Payam Nabovati, Mehdi Khabazkhoob, Abbasali Yekta, Mohammad Hassan Emamian, Akbar Fotouhi
PURPOSE: The aim was to determine the distribution and associated factors of accommodative amplitude (AA) in six- to 12-year-old children and compare the results with those calculated using Hofstetter's formula. METHODS: In a cross-sectional study in 2015, random sampling was done from urban and rural populations of Shahroud, northern Iran. Participating schoolchildren were examined for manifest, cycloplegic and subjective refraction, as well as uncorrected vision and visual acuity...
May 17, 2017: Clinical & Experimental Optometry: Journal of the Australian Optometrical Association
https://www.readbyqxmd.com/read/28486721/topography-guided-lasik-versus-small-incision-lenticule-extraction-smile-for-myopia-and-myopic-astigmatism-a-randomized-prospective-contralateral-eye-study
#16
Anastasios John Kanellopoulos
PURPOSE: To compare safety and efficacy of topography-guided LASIK and contralateral eye SMILE for myopia and myopic astigmatism correction. METHODS: This prospective, randomized contralateral eye study included 44 eyes of 22 patients with bilateral myopia or myopic astigmatism. Treated eyes were divided into two groups: 22 eyes were treated with topography-guided LASIK and the fellow eye of each patient was treated with SMILE. The following parameters were evaluated preoperatively and up to 3 months postoperatively: uncorrected distance vision acuity (UDVA), corrected distance vision acuity (CDVA), refractive error, corneal keratometry, contrast sensitivity, and Objective Scatter Index...
May 1, 2017: Journal of Refractive Surgery
https://www.readbyqxmd.com/read/28472231/visual-impairment-in-preschool-children-in-the-united-states-demographic-and-geographic-variations-from-2015-to-2060
#17
MULTICENTER STUDY
Rohit Varma, Kristina Tarczy-Hornoch, Xuejuan Jiang
Importance: Visual impairment (VI) in early childhood can significantly impair development. Objective: To determine demographic and geographic variations in VI in children aged 3 to 5 years in the United States in 2015 and to estimate projected prevalence through 2060. Design, Setting, and Participants: Descriptive study reporting statistics estimated based on prevalence data from 2 major population-based studies conducted in the United States between 2003 and 2011...
June 1, 2017: JAMA Ophthalmology
https://www.readbyqxmd.com/read/28430177/the-prevalence-of-visual-impairment-and-blindness-in-underserved-rural-areas-a-crucial-issue-for-future
#18
H Hashemi, A Yekta, E Jafarzadehpur, A Doostdar, H Ostadimoghaddam, M Khabazkhoob
PurposeTo determine the prevalence of visual impairment and blindness in underserved Iranian villages and to identify the most common cause of visual impairment and blindness.Patients and methodsMultistage cluster sampling was used to select the participants who were then invited to undergo complete examinations. Optometric examinations including visual acuity, and refraction were performed for all individuals. Ophthalmic examinations included slit-lamp biomicroscopy and ophthalmoscopy. Visual impairment was determined according to the definitions of the WHO and presenting vision...
April 21, 2017: Eye
https://www.readbyqxmd.com/read/28426857/spectacle-wear-among-children-in-a-school-based-program-for-ready-made-vs-custom-made-spectacles-in-india-a-randomized-clinical-trial
#19
RANDOMIZED CONTROLLED TRIAL
Priya Morjaria, Jenifer Evans, Kaushik Murali, Clare Gilbert
Importance: Uncorrected refractive errors are the most common cause of visual impairment in children despite correction being highly cost-effective. Objective: To determine whether less expensive ready-made spectacles produce rates of spectacle wear at 3 to 4 months comparable to those of more expensive custom-made spectacles among eligible school-aged children. Design, Setting, and Participants: This noninferiority, double-masked, randomized clinical trial recruited children aged 11 to 15 years from January 12 through July 31, 2015, from government schools in urban and periurban areas surrounding Bangalore, India...
June 1, 2017: JAMA Ophthalmology
https://www.readbyqxmd.com/read/28410722/visual-outcomes-of-laser-vision-correction-in-eyes-with-preoperative-amblyopia
#20
Nir Sorkin, David Varssano, David Smadja, Ainat Klein, Michael Mimouni, Amir Rosenblatt
PURPOSE: To evaluate the visual outcomes of photorefractive keratectomy (PRK) and laser in situ keratomileusis (LASIK) in amblyopic eyes. SETTING: Care Vision Refractive Clinic, Tel Aviv, Israel. DESIGN: Retrospective case series. METHODS: Amblyopic eyes of patients with a preoperative corrected distance visual acuity (CDVA) of 20/33 or worse had PRK or LASIK. Postoperative visual outcomes (uncorrected distance visual acuity, CDVA) and correlations with age, preoperative CDVA, refractive error type, astigmatism grade, procedure type, laser suite model, amblyopia grade, and amblyopia type were analyzed...
March 2017: Journal of Cataract and Refractive Surgery
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