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Uncorrected refractive error

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https://www.readbyqxmd.com/read/28913512/the-distribution-of-negative-and-positive-relative-accommodation-and-their-relationship-with-binocular-and-refractive-indices-in-a-young-population
#1
AbbasAli Yekta, Hassan Hashemi, Mehdi Khabazkhoob, Hadi Ostadimoghaddam, Somayeh Ghasemi-Moghaddam, Ebrahim Jafarzadehpur, Fereshteh Shokrollahzadeh
PURPOSE: To determine the distribution of negative relative accommodation (NRA) and positive relative accommodation (PRA) and its relationship with binocular vision indices in a young population. METHODS: In this cross-sectional study conducted in a student population, samples were selected through multistage cluster sampling. All the samples underwent the measurement of uncorrected and corrected visual acuity and refraction. Then far and near cover tests were performed...
September 2017: Journal of Current Ophthalmology
https://www.readbyqxmd.com/read/28913509/effects-of-single-segment-intacs-implantation-on-visual-acuity-and-corneal-topographic-indices-of-keratoconus
#2
Kazem Amanzadeh, Roghiyeh Elham, Ebrahim Jafarzadepur
PURPOSE: To assess the changes in visual acuity and topographic indices after implantation of single-segment Intacs. METHODS: Forty-two keratoconic eyes received Femtosecond-assisted single-segment Intacs. Uncorrected distance visual acuity (UDVA) and best spectacle corrected visual acuity (BSCVA), refractive error, keratometry (K1, K2, Km, and KMax.), and seven Pentacam measured topographical indices; index of surface variance (ISV), index of vertical asymmetry (IVA), keratoconus index (KI), central keratoconus index (CKI), index of height asymmetry (IHA), index of height decentration (IHD), and minimum radius of curvature (R Min) were assessed 4 months after surgery...
September 2017: Journal of Current Ophthalmology
https://www.readbyqxmd.com/read/28880336/toric-icl-implantation-after-sequential-intracorneal-ring-segments-implantation-and-corneal-cross-linking-in-keratoconus-2-year-follow-up
#3
Youssef Abdelmassih, Sylvain El-Khoury, Elias Chelala, Elise Slim, Carole G Cherfan, Elias Jarade
PURPOSE: To evaluate 6-month and 2-year safety and clinical outcomes of Visian toric Implantable Collamer Lens (toric ICL) (STAAR Surgical, Monrovia, CA) implantation for the treatment of residual refractive errors after sequential intracorneal ring segments (ICRS) insertion and cross-linking (CXL) in keratoconus. METHODS: This consecutive case series included the results of a three-step ICRS-CXL-toric ICL procedure in 16 eyes of 13 patients with moderate to severe keratoconus (stages II and III of Amsler-Krumeich classification)...
September 1, 2017: Journal of Refractive Surgery
https://www.readbyqxmd.com/read/28875250/effect-of-iris-registration-on-outcomes-of-femtolasik-for-myopia-and-myopic-astigmatism
#4
Mohammad Ghoreishi, Zahra Naderi Beni, Afsaneh Naderi Beni, Farzan Kianersi
PURPOSE: To compare the visual and refractive outcomes after FEMTOLASIK with and without iris registration. METHODS: In this randomized, prospective, comparative, contralateral eye study, 118 eyes of 59 patients with myopia and myopic astigmatism underwent LASIK using the Femto LDV femtosecond laser (160 µm) and the MEL80 with or without iris registration. For each patient, iris registration FEMTOLASIK was performed on one eye and non-iris registration FEMTOLASIK was performed on the other eye, assigned at random...
September 5, 2017: International Ophthalmology
https://www.readbyqxmd.com/read/28846701/a-comparison-of-visual-outcome-and-rotational-stability-of-two-types-of-toric-implantable-collamer-lenses-ticl-v4-versus-v4c
#5
Joo Hyun, Dong Hui Lim, Doo Ri Eo, Sungsoon Hwang, Eui-Sang Chung, Tae-Young Chung
PURPOSE: To compare the efficacy and rotational stability after implantation of two types of toric implantable collamer lenses (Toric ICL™(TICL);V4 and V4c, STAAR Surgical Co.). STUDY DESIGN: Retrospective case series. METHODS: This retrospective study evaluated total 48 eyes of 48 patients who underwent the implantation with V4 and V4c TICL with a central hole; A twenty-four eyes of 24 patients with V4 TICL and 24 eyes of 24 patients with V4c TICL with a central hole...
2017: PloS One
https://www.readbyqxmd.com/read/28834812/long-term-follow-up-of-intrastromal-corneal-ring-segments-210-degree-arc-length-in-central-keratoconus-with-high-corneal-asphericity
#6
C Lisa, L Fernández-Vega Cueto, A Poo-López, D Madrid-Costa, José F Alfonso
PURPOSE: To assess the long-term outcomes of implanting intrastromal corneal ring segments (ICRSs) to correct central keratoconus with a high corneal asphericity value. METHODS: Forty-three eyes with central keratoconus with a corneal asphericity value ≥-1.00 were evaluated before and after implanting an inferior 210-degree arc-length Ferrara-type AFR5 ICRS (AJL Ophthalmic, Spain). Logarithm of the minimum angle of resolution uncorrected (UDVA) and best-corrected (CDVA) distance visual acuity, corneal asphericity, root mean square for coma-like aberrations [computed for the Zernike terms Z (3, 1) and Z (3, -1)], and residual refractive errors analyzed using vector analysis were recorded before and at all follow-up visits...
August 22, 2017: Cornea
https://www.readbyqxmd.com/read/28823075/refractive-corneal-and-ocular-residual-astigmatism-distribution-in-a-german-population-and-age-dependency-the-gutenberg-health-study
#7
Alexander Karl-Georg Schuster, Norbert Pfeiffer, Andreas Schulz, René Hoehn, Katharina A Ponto, Philipp S Wild, Maria Blettner, Manfred E Beutel, Karl J Lackner, Thomas Münzel, Alireza Mirshahi
PURPOSE: Worldwide, the most frequent cause of visual impairment is uncorrected refractive error. This analysis focused on the distribution and associations of refractive, corneal and ocular residual astigmatism. METHODS: As part of the Gutenberg Health study, a population-based cross-sectional study was conducted in the general population of Germany. A comprehensive ophthalmological examination including refraction, tonometry, and Scheimpflug imaging of the anterior cornea (Pachycam) was performed...
August 19, 2017: Graefe's Archive for Clinical and Experimental Ophthalmology
https://www.readbyqxmd.com/read/28817733/changing-patterns-of-cataract-services-in-north-west-nigeria-2005-2016
#8
Nasiru Muhammad, Mohammed Dantani Adamu, Mpyet Caleb, Nuhu Mohammed Maishanu, Aliyu Mohammed Jabo, Muhammad Mansur Rabiu, Covadonga Bascaran, Sunday Isiyaku, Allen Foster
PURPOSE: This study was conducted to assess the impact of the eye care programme on cataract blindness and cataract surgical services in Sokoto, Nigeria over a 12 year period 2005-2016. METHODS: Data from the 2005 population based cross-sectional study of blindness in Sokoto state was re-analysed to obtain baseline estimates of the prevalence of cataract blindness and cataract surgical coverage for persons 50 years and over in Wurno health zone. A population based survey of a representative sample of persons 50 years and over in Wurno health zone was conducted in July 2016...
2017: PloS One
https://www.readbyqxmd.com/read/28801741/scleral-suture-fixation-technique-for-dislocated-plate-haptic-toric-iol
#9
Remzi Karadag, Bahar Gunes, Veysel Aykut, Halit Oguz, Ahmet Demirok
Purpose We describe a scleral suture fixation technique for dislocated plate haptic toric intraocular lens (IOL) implantation. Materials and methods A double-armed 10-0 straight polypropylene suture was passed into the eye from the sclera (2 mm away from the limbus). A suture needle was passed through the hole on the corner of the IOL and pulled out from the paracentesis with a 27-gauge needle. Afterward, the suture needle was reinserted from the same paracentesis and then removed from the eye with the help of a 27-gauge needle entering the eye from a nearby point to the first scleral entrance...
August 11, 2017: International Ophthalmology
https://www.readbyqxmd.com/read/28762432/prevalence-of-uncorrected-refractive-errors-among-children-aged-3-10-years-in-western-saudi-arabia
#10
Nojood Hameed R Alrahili, Esraa S Jadidy, Bayan Sulieman H Alahmadi, Mohammed F Abdula'al, Alaa S Jadidy, Abdulaziz A Alhusaini, Moaz A Mojaddidi, Maan A Al-Barry
To determine the prevalence of uncorrected refractive errors (URE) among children 3-10 years and to affirm the necessity of a national school-based visual screening program for school-aged children. Methods: This retrospective cross-sectional study was conducted in Medina, Saudi Arabia in 2015. Children were selected through a multistage stratified random sampling from 8 kindergarten and 8 primary schools. Those included were screened to diagnose UREs using a visual acuity chart and an auto refractometer according to American guidelines...
August 2017: Saudi Medical Journal
https://www.readbyqxmd.com/read/28749894/comparison-of-outcomes-between-combined-transepithelial-photorefractive-keratectomy-with-and-without-accelerated-corneal-collagen-cross-linking-a-1-year-study
#11
Hun Lee, David Sung Yong Kang, Byoung Jin Ha, Jin Young Choi, Eung Kweon Kim, Kyoung Yul Seo, Tae-Im Kim
PURPOSE: To investigate the effects of combined transepithelial photorefractive keratectomy (tPRK) and accelerated corneal collagen cross-linking (CXL) on visual acuity and refractive outcomes. METHODS: The medical records of 89 eyes (89 patients) undergoing combined tPRK and CXL (tPRK-CXL group) or tPRK alone (tPRK group) were retrospectively analyzed. Uncorrected distance visual acuity (UDVA), corrected distance visual acuity, and manifest refraction spherical equivalent (MRSE) were evaluated preoperatively and 2 weeks, 1, 3, 6, and 12 months after surgery...
October 2017: Cornea
https://www.readbyqxmd.com/read/28732613/photorefractive-intrastromal-corneal-crosslinking-for-the-treatment-of-myopic-refractive-errors-six-month-interim-findings
#12
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
#13
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
#14
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
#15
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
#16
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
#17
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
#18
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
#19
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
#20
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
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