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https://www.readbyqxmd.com/read/28060058/corneal-collagen-cross-linking-for-keratoconus-in-pediatric-patients-long-term-results
#1
Prema Padmanabhan, Sudhir Rachapalle Reddi, Rama Rajagopal, Radhika Natarajan, Geetha Iyer, Bhaskar Srinivasan, Niveditha Narayanan, Meena Lakshmipathy, Shweta Agarwal
PURPOSE: To report the long-term outcome of corneal collagen cross-linking (CXL) for progressive keratoconus in pediatric patients. METHODS: "Epithelium-off" CXL was performed in pediatric eyes with progressive keratoconus. Spectacle-corrected distance visual acuity (CDVA), retinoscopy, topography, and tomography were documented preoperatively and postoperatively at 3 months, 6 months, 1 year, and annually thereafter. RESULTS: A total of 377 eyes of 336 pediatric patients aged 8 to 18 years with progressive keratoconus underwent CXL...
February 2017: Cornea
https://www.readbyqxmd.com/read/28032802/risk-factors-for-developing-myopia-among-schoolchildren-in-yerevan-and-gegharkunik-province-armenia
#2
Aida Giloyan, Tsovinar Harutyunyan, Varduhi Petrosyan
PURPOSE: Myopia is a complex condition leading to visual impairment and blindness. This study assessed the prevalence of and risk factors for myopia among schoolchildren in urban and rural areas of Armenia. METHODS: A cross-sectional interviewer-administered survey together with eye screenings was conducted among schoolchildren in the capital Yerevan and in Gegharkunik Province. The study used multi-stage random sampling to obtain the sample of 1260 schoolchildren...
December 29, 2016: Ophthalmic Epidemiology
https://www.readbyqxmd.com/read/28030881/intra-and-inter-examiner-repeatability-of-cycloplegic-retinoscopy-among-young-children
#3
Sara J McCullough, Lesley Doyle, Kathryn J Saunders
PURPOSE: To evaluate the intra- and inter-examiner repeatability of cycloplegic retinoscopy in young children aged 4-5 years old. METHODS: Examiner 1 refracted all children in the first sample (n = 108); firstly with masked loose lenses, then using unmasked loose lenses (intra-examiner repeatability). Examiners 1 and 2 refracted all children in the second sample (n = 97) using unmasked loose lenses, blind to the child's refractive error, presence/magnitude of habitual spectacle correction and to each other's findings (inter-examiner repeatability)...
January 2017: Ophthalmic & Physiological Optics: the Journal of the British College of Ophthalmic Opticians (Optometrists)
https://www.readbyqxmd.com/read/28001106/evaluation-of-potential-risk-factors-for-development-of-primary-angle-closure-glaucoma-in-bouviers-des-flandres
#4
Alexis J Dubin, Ellison Bentley, Kevin A Buhr, Paul E Miller
OBJECTIVE To evaluate potential risk factors for development of primary angle-closure glaucoma (PACG) in Bouviers des Flandres. DESIGN Prospective, observational study. ANIMALS 98 Bouviers des Flandres. PROCEDURES All dogs underwent slit-lamp biomicroscopy, indirect ophthalmoscopy, gonioscopy, applanation tonometry, streak retinoscopy, and A-scan, B-scan, and high-resolution ultrasonography. Iridocorneal angles and degree of pectinate ligament dysplasia sheeting were graded, and an angle index was mathematically derived for each eye on the basis of these values...
January 1, 2017: Journal of the American Veterinary Medical Association
https://www.readbyqxmd.com/read/27968870/developmental-profile-of-ocular-refraction-in-patients-with-congenital-cataract-a-prospective-cohort-study
#5
Zhenzhen Liu, Erping Long, Jingjing Chen, Zhuoling Lin, Duoru Lin, Xiaohang Wu, Qianzhong Cao, Xiaoyan Li, Dongni Wang, Lixia Luo, Bo Qu, Runzhong Liu, Xiaopin Liu, Haotian Lin, Weirong Chen, Yizhi Liu
BACKGROUND: Refractive status is crucial to visual function and can change throughout life. For patients with congenital cataract, the developmental profile of refraction is complicated owing to the potential influence of diverse clinical manifestations and various treatments, and has not yet been fully characterised. METHODS: In this prospective cohort study, we enrolled patients with congenital cataract from the Childhood Cataract Program of the Chinese Ministry of Health (CCPMOH)...
October 2016: Lancet
https://www.readbyqxmd.com/read/27960580/prevalence-and-causes-of-visual-impairment-and-blindness-among-cocoa-farmers-in-ghana
#6
Samuel Bert Boadi-Kusi, Rekha Hansraj, Khathutshelo Percy Mashige, Alfred Osafo-Kwaako, Alex Azuka Ilechie, Samuel Abokyi
PURPOSE: To determine the prevalence and causes of visual impairment and blindness among cocoa farmers in Ghana in order to formulate early intervention strategies. METHODS: A cross-sectional study using multistage random sampling from four cocoa growing districts in Ghana was conducted from November 2013 to April 2014. A total of 512 cocoa farmers aged 40 years and older were interviewed and examined. The brief interview questionnaire was administered to elicit information on the demographics and socioeconomic details of participants...
February 2017: Ophthalmic Epidemiology
https://www.readbyqxmd.com/read/27932859/central-corneal-thickness-of-iraqi-population-in-relation-to-age-gender-refractive-errors-and-corneal-curvature-a-hospital-based-cross-sectional-study
#7
Yasir Jawad Kadhim, Qasim K Farhood
BACKGROUND: Central corneal thickness (CCT) is an important indicator of corneal status. Its measurement provides valid information about corneal physiological condition and possible changes associated with diseases, traumas, and hypoxia. It is an integral part for interpretation of intraocular pressure and glaucoma patient management and in prerefractive procedure assessment. OBJECTIVE: The aim of this study is to determine the mean CCT among a normal Iraqi population and to correlate between CCT and age, gender, refraction, and corneal curvature...
2016: Clinical Ophthalmology
https://www.readbyqxmd.com/read/27921328/comprehensive-profile-of-bilateral-astigmatism-rule-similarity-and-symmetry-patterns-of-the-axes-in-the-fellow-eyes
#8
Amir Asharlous, Mehdi Khabazkhoob, Abbasali Yekta, Hassan Hashemi
PURPOSE: To study rule similarity (isorule or anisorule) and symmetry patterns of axes (direct and mirror) in bilateral astigmatism. METHODS: Six years of data were collected from four ophthalmology clinics in Tehran. After applying the exclusion criteria (having eye disease or history of ocular surgery), final analyses were performed on data of 160 608 cases whose mean age was 39.2 ± 15.4 years (10-80 years) and 53.7% female. All subjects had autorefraction, retinoscopy, and subjective refraction data...
January 2017: Ophthalmic & Physiological Optics: the Journal of the British College of Ophthalmic Opticians (Optometrists)
https://www.readbyqxmd.com/read/27918352/corneal-collagen-cross-linking-for-keratoconus-in-pediatric-patients-long-term-results
#9
Prema Padmanabhan, Sudhir Rachapalle Reddi, Rama Rajagopal, Radhika Natarajan, Geetha Iyer, Bhaskar Srinivasan, Niveditha Narayanan, Meena Lakshmipathy, Shweta Agarwal
PURPOSE: To report the long-term outcome of corneal collagen cross-linking (CXL) for progressive keratoconus in pediatric patients. METHODS: "Epithelium-off" CXL was performed in pediatric eyes with progressive keratoconus. Spectacle-corrected distance visual acuity (CDVA), retinoscopy, topography, and tomography were documented preoperatively and postoperatively at 3 months, 6 months, 1 year, and annually thereafter. RESULTS: A total of 377 eyes of 336 pediatric patients aged 8 to 18 years with progressive keratoconus underwent CXL...
December 1, 2016: Cornea
https://www.readbyqxmd.com/read/27891365/visual-function-and-ocular-status-in-children-with-disabilities-in-special-schools-of-northern-india
#10
Gurvinder Kaur, Satish Thomas, Mahesh Jindal, S M Bhatti
INTRODUCTION: Children with disabilities (other than visual impairment) are at a higher risk of visual impairment as compared to normal population. Majority of the ocular disorders, like refractive errors and strabismus, are easily treatable. As these children depend on their visual inputs for social and academic activities, an early detection and prompt treatment of even a minor visual problem is of utmost importance for them. AIM: To assess the visual function and ocular status of children with disabilities other than visual impairment and to identify the preventable and treatable causes of visual impairment...
October 2016: Journal of Clinical and Diagnostic Research: JCDR
https://www.readbyqxmd.com/read/27852399/-analysis-of-the-influence-factors-of-school-age-children-s-refractive-status
#11
Z G Chen, M C Chen, J Y Zhang, D Q Cai, Q Wang, S S Lin, J W Chen, H L Zhong
Objective: To analyze the influence of the eye biological parameters, height, and weight on the school-age children's refractive status. Methods: Cross-sectional study. A total of 1 656 children (1 656 eyes), aged from 7 to 14 years, were selected from 8 schools in Wenzhou during June 2012 and June 2013. The height and weight of each child were measured, and the body mass index (BMI) was calculated. The eye biological parameters, including axial length (AL), corneal power (C=1/CR), anterior chamber depth (ACD), and white to white (WTW), were measured by IOLMaster (version 5...
November 11, 2016: [Zhonghua Yan Ke za Zhi] Chinese Journal of Ophthalmology
https://www.readbyqxmd.com/read/27829051/scleral-cross-linking-using-riboflavin-uva-irradiation-for-the-prevention-of-myopia-progression-in-a-guinea-pig-model-blocked-axial-extension-and-altered-scleral-microstructure
#12
Shuai Liu, Shengjie Li, Bingjie Wang, Xiao Lin, Yi Wu, Hong Liu, Xiaomei Qu, Jinhui Dai, Xingtao Zhou, Hao Zhou
PURPOSE: To develop methods of collagen cross-linking (CXL) in the sclera for the treatment of progressive myopia and to investigate the biomechanical and histological changes that occur in as a result. METHODS: Twenty 14-day-old guinea pigs were divided into 3 groups: the cross-linking group (CL, n = 8), non cross-linking group (NCL, n = 8), and control group (n = 4). The scleras of the right eyes of the guinea pigs in the CL group were surgically exposed and riboflavin was dropped onto the irradiation zone for 20 seconds prior to ultraviolet-A (UVA) irradiation...
2016: PloS One
https://www.readbyqxmd.com/read/27815189/usefulness-of-refractive-measurement-of-wavefront-autorefraction-in-patients-with-difficult-retinoscopy
#13
Michael Kinori, Cintia F Gomi, Courtney L Ondeck, David J Schanzlin, Shira L Robbins, David B Granet
PURPOSE: To assess the ability of the WaveScan WaveFront System (VISX Inc, Santa Clara, CA) to measure refractive errors in patients with difficult retinoscopy and to compare results to standard cycloplegic retinoscopy. METHODS: The medical records of patients with an ocular condition that could contribute to difficult or unreliable retinoscopy who underwent nondilated, noncycloplegic evaluation with the WaveScan WaveFront System were reviewed retrospectively. Results were compared to a standard cycloplegic retinoscopy...
December 2016: Journal of AAPOS: the Official Publication of the American Association for Pediatric Ophthalmology and Strabismus
https://www.readbyqxmd.com/read/27803811/autorefraction-retinoscopy-javal-s-rule-and-grosvenor-s-modified-javal-s-rule-the-best-predictor-of-refractive-astigmatism
#14
Kofi Asiedu, Samuel Kyei, Emmanuel Ekow Ampiah
The aim of the study was to determine the level of agreement between Javal's rule, autorefraction, retinoscopy, and refractive astigmatism and to determine which technique is the most suitable substitute when subjective refraction is not applicable using a clinical sample. A total of 36 subjects, 14 males and 22 females, were involved in this study. The intraclass correlation coefficients between subjective refraction, autorefraction, and retinoscopy were 0.895 and 0.989, respectively, for the spherical equivalent...
2016: Journal of Ophthalmology
https://www.readbyqxmd.com/read/27668640/evaluation-of-the-svone-handheld-autorefractor-in-a-pediatric-population
#15
Mark Rosenfield, Kenneth J Ciuffreda
PURPOSE: The SVOne is a portable, Hartmann-Shack wavefront aberrometer, which can be attached to a smartphone to determine the refractive error of the eye objectively. Previous results have shown the device to provide measurements equivalent to those of standard clinical techniques in young, healthy adults. The aim of the present study was to compare the findings of the SVOne with retinoscopy, subjective refraction, and two commercially available autorefractors (Retinomax-3 and WAM-5500) in a pediatric population...
September 23, 2016: Optometry and Vision Science: Official Publication of the American Academy of Optometry
https://www.readbyqxmd.com/read/27621785/evaluating-three-different-methods-of-determining-addition-in-presbyopia
#16
Negareh Yazdani, Abbas Azimi Khorasani, Hanieh Mirhajian Moghadam, Abbas Ali Yekta, Hadi Ostadimoghaddam, Javad Heravian Shandiz
PURPOSE: To compare three different methods for determining addition in presbyopes. METHODS: The study included 81 subjects with presbyopia who aged 40-70 years. Reading addition values were measured using 3 approaches including the amplitude of accommodation (AA), dynamic retinoscopy (DR), and increasing plus lens (IPL). RESULTS: IPL overestimated reading addition relative to other methods. Mean near addition obtained by AA, DR and IPL were 1...
July 2016: Journal of Ophthalmic & Vision Research
https://www.readbyqxmd.com/read/27535408/the-effect-of-unilateral-disruption-of-the-centrifugal-visual-system-on-normal-eye-development-in-chicks-raised-under-constant-light-conditions
#17
Christopher Mark Dillingham, Jeremy Andrew Guggenheim, Jonathan Thor Erichsen
The centrifugal visual system (CVS) comprises a visually driven isthmic feedback projection to the retina. While its function has remained elusive, we have previously shown that, under otherwise normal conditions, unilateral disconnection of centrifugal neurons in the chick affected eye development, inducing a reduced rate of axial elongation that resulted in a unilateral hyperopia in the eye contralateral to the lesion. Here, we further investigate the role of centrifugal neurons in ocular development in chicks reared in an abnormal visual environment, namely constant light...
August 17, 2016: Brain Structure & Function
https://www.readbyqxmd.com/read/27531112/-analysis-of-myopia-and-axial-length-changes-and-relevant-factors-of-children-aged-7-to-14-years-in-wenzhou
#18
J Y Zhang, Q Wang, S S Lin, J W Chen, H L Zhong, D Q Ca, Z G Chen
OBJECTIVE: To investigate the incidence and features of myopia in children aged 7 to 14 years. METHODS: Cross-sectional study. A total of 2 226 children (2 226 eyes) aged 7 to 14 years were selected from school during June 2012 and January 2015. Refraction was measured by fast cycloplegic retinoscopy. SPSS16.0 was used to analyze the data. Ocular refractive parameters, including axial length (AL), corneal power, anterior chamber depth, and white to white, were measured by IOLMaster (version 5...
July 2016: [Zhonghua Yan Ke za Zhi] Chinese Journal of Ophthalmology
https://www.readbyqxmd.com/read/27426488/a-comparison-of-cycloplegic-autorefraction-and-retinoscopy-in-indian-children
#19
Sujata Guha, Sanil Shah, Khyati Shah, Preeti Hurakadli, Debalina Majee, Shyamali Gandhi
BACKGROUND: Correction of significant refractive errors in childhood helps in preventing amblyopia and strabismus. India has a huge demand for eye-care services related to uncorrected refractive errors with limited manpower resources. This can be overcome by autorefractors, which are free of operator bias, do not need skilled eye-care professionals and can be operated with ease. Hence, the purpose of this study, the first in the Indian population, was to determine the accuracy of autorefraction compared to traditional retinoscopy under cycloplegia...
January 2017: Clinical & Experimental Optometry: Journal of the Australian Optometrical Association
https://www.readbyqxmd.com/read/27417629/steps-towards-smarter-solutions-in-optometry-and-ophthalmology-inter-device-agreement-of-subjective-methods-to-assess-the-refractive-errors-of-the-eye
#20
Arne Ohlendorf, Alexander Leube, Siegfried Wahl
PURPOSE: To investigate the inter-device agreement and mean differences between a newly developed digital phoropter and the two standard methods (trial frame and manual phoropter). METHODS: Refractive errors of two groups of participants were measured by two examiners (examiner 1 (E1): 36 subjects; examiner 2 (E2): 38 subjects). Refractive errors were assessed using a trial frame, a manual phoropter and a digital phoropter. Inter-device agreement regarding the measurement of refractive errors was analyzed for differences in terms of the power vector components (spherical equivalent (SE) and the cylindrical power vector components J0 and J45) between the used methods...
2016: Healthcare (Basel, Switzerland)
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