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https://www.readbyqxmd.com/read/28719538/misight-assessment-study-spain-a-comparison-of-vision-related-quality-of-life-measures-between-misight-contact-lenses-and-single-vision-spectacles
#1
Alicia Ruiz Pomeda, Belén Pérez-Sánchez, Maria Del Pilar Cañadas Suárez, Francisco Luis Prieto Garrido, Ramón Gutiérrez-Ortega, César Villa-Collar
OBJECTIVES: Recent research has shown that concentric contact lenses (CLs) can be a way to control the progression of myopia. The purpose of the current study was to compare vision-related quality-of-life measures in children wearing distance single-vision (SV) spectacles versus MiSight CLs, a specific concentric design for myopia control. METHODS: Subjects aged 8 to 12 with myopia from -0.75 to -4.00 diopters (D) of sphere and astigmatism less than 1.00 D of cylinder were allocated to the lenses study group (MiSight) or control group (SV)...
July 14, 2017: Eye & Contact Lens
https://www.readbyqxmd.com/read/28716114/visumax-femtolasik-versus-moria-m2-microkeratome-in-mild-to-moderate-myopia-efficacy-safety-predictability-aberrometric-changes-and-flap-thickness-predictability
#2
Magda A Torky, Yousif A Al Zafiri, Abeer M Khattab, Rania K Farag, Eman A Awad
INTRODUCTION: This is an interventional prospective clinical study which was conducted to evaluate the efficacy, safety, predictability, ocular aberrations, and flap thickness predictability of Visumax femtosecond laser (FSL) compared to Moria M2 microkeratome (MK) in mild to moderate myopia. METHODS: This study included 60 eyes who were divided into two groups. Thirty eyes in group (I) in which the flap was created with Visumax FSL, while in group II (30 eyes) the Moria M2 MK was used...
July 17, 2017: BMC Ophthalmology
https://www.readbyqxmd.com/read/28712891/corneo-scleral-contact-lenses-in-an-uncommon-case-of-keratoconus-with-high-hyperopia-and-astigmatism
#3
Esteban Porcar, Juan Carlos Montalt, Enrique España-Gregori, Cristina Peris-Martínez
PURPOSE: To analyse the visual quality achieved by fitting corneo-scleral contact lenses (CScL) in an uncommon case of bilateral keratoconus, high hyperopia and astigmatism. METHODS: A 45-year-old man presented for eye examination due to the unsatisfactory quality of his vision wearing soft toric contact lenses. He presented high hyperopia and astigmatism with bilateral keratoconus. He was fitted with CScL to correct his irregular astigmatism and ocular aberrations...
July 13, 2017: Contact Lens & Anterior Eye: the Journal of the British Contact Lens Association
https://www.readbyqxmd.com/read/28709084/aberration-measurement-of-the-probe-forming-system-of-an-electron-microscope-using-two-dimensional-materials
#4
Hidetaka Sawada, Christopher S Allen, Shanshan Wang, Jamie H Warner, Angus I Kirkland
The geometric and chromatic aberration coefficients of the probe-forming system in an aberration corrected transmission electron microscope have been measured using a Ronchigram recorded from monolayer graphene. The geometric deformations within individual local angular sub-regions of the Ronchigram were analysed using an auto-correlation function and the aberration coefficients for the probe forming lens were calculated. This approach only requires the acquisition of a single Ronchigram allowing rapid measurement of the aberration coefficients...
July 5, 2017: Ultramicroscopy
https://www.readbyqxmd.com/read/28696042/reduced-vision-in-highly-myopic-eyes-without-ocular-pathology-the-zoc-bhvi-high-myopia-study
#5
Monica Jong, Padmaja Sankaridurg, Wayne Li, Serge Resnikoff, Kovin Naidoo, Mingguang He
BACKGROUND: The aim was to investigate the relationship of the magnitude of myopia with visual acuity in highly myopic eyes without ocular pathology. METHODS: Twelve hundred and ninety-two highly myopic eyes (up to -6.00 DS both eyes, no astigmatic cut-off) with no ocular pathology from the ZOC-BHVI high myopia study in China, had cycloplegic refraction, followed by subjective refraction and visual acuities and axial length measurement. Two logistic regression models were undertaken to test the association of age, gender, refractive error, axial length and parental myopia with reduced vision...
July 11, 2017: Clinical & Experimental Optometry: Journal of the Australian Optometrical Association
https://www.readbyqxmd.com/read/28692136/measurement-centration-and-zone-diameter-in-anterior-posterior-and-total-corneal-astigmatism-in-keratoconus
#6
Anneli Fredriksson, Anders Behndig
PURPOSE: To investigate the central and paracentral astigmatism and the significance of centration and measurement zone diameter compared to a 3-mm pupil-centred measurement zone in keratoconus and in healthy eyes. METHODS: Twenty-eight right eyes from 28 KC patients with an inferotemporal cone were selected according to specified criteria based on Oculus Pentacam HR(®) measurements and were matched with healthy control eyes. The flat (K1) and steep (K2) keratometry readings were registered from the 'Total Corneal Refractive Power' (TCRP) display as well as the anterior and posterior corneal astigmatism displays (ACA and PCA, respectively)...
July 10, 2017: Acta Ophthalmologica
https://www.readbyqxmd.com/read/28690485/a-novel-pathogenic-variant-in-the-mitf-gene-segregating-with-a-unique-spectrum-of-ocular-findings-in-an-extended-iranian-waardenburg-syndrome-kindred
#7
Nazanin Jalilian, Mohammad A Tabatabaiefar, Tayyeb Bahrami, Golaleh Karbasi, Mohammad H Bahramian, Abdolrahman Salimpoor, Mohammad R Noori-Daloii
Waardenburg syndrome (WS) is a rare genetic disorder characterized by abnormal pigmentation of the hair, skin, and iris as well as sensorineural hearing loss. WS is subdivided into 4 major types (WS1-4), where WS2 is characterized by the absence of dystopia canthorum. This study was launched to investigate clinical and molecular characteristics of WS in an extended Iranian WS2 family. A comprehensive clinical investigation was performed. Peripheral blood samples were collected and genomic DNA was extracted...
June 2017: Molecular Syndromology
https://www.readbyqxmd.com/read/28685469/optical-design-of-adaptive-optics-confocal-scanning-laser-ophthalmoscope-with-two-deformable-mirrors
#8
Jinsheng Yang, Yuanyuan Wang, Xuejun Rao, Ling Wei, Xiqi Li, Yi He
We describe the optical design of a confocal scanning laser ophthalmoscope with two deformable mirrors. Spherical mirrors are used for pupil relay. Defocus aberration of the human eye is corrected by a Badal focusing structure and astigmatism aberration is corrected by a deformable mirror. The main optical system achieves a diffraction-limited performance through the entire scanning field (6 mm pupil, 3 degrees on pupil plane). The performance of the optical system, with correction of defocus and astigmatism, is also evaluated...
2017: Advances in Experimental Medicine and Biology
https://www.readbyqxmd.com/read/28681906/refractive-changes-induced-by-spherical-aberration-in-laser-correction-procedures-an-adaptive-optics-study
#9
Alfredo Amigó, Paula Martinez-Sorribes, Margarita Recuerda
PURPOSE: To study the effect on vision of induced negative and positive spherical aberration within the range of laser vision correction procedures. METHODS: In 10 eyes (mean age: 35.8 years) under cyclopegic conditions, spherical aberration values from -0.75 to +0.75 µm in 0.25-µm steps were induced by an adaptive optics system. Astigmatism and spherical refraction were corrected, whereas the other natural aberrations remained untouched. Visual acuity, depth of focus defined as the interval of vision for which the target was still perceived acceptable, contrast sensitivity, and change in spherical refraction associated with the variation in pupil diameter from 6 to 2...
July 1, 2017: Journal of Refractive Surgery
https://www.readbyqxmd.com/read/28681905/the-effects-of-distance-between-the-corneal-apex-and-the-inner-and-outer-corneal-wound-edges-on-corneal-astigmatism-after-cataract-surgery
#10
Tae Gi Kim, Sung Rae Noh, Kyung Hyun Jin
PURPOSE: To compare the effects of the distance from the inner and outer corneal incision wounds to the corneal apex on the changes in corneal astigmatism after cataract surgery. METHODS: Seventy-two eyes with anterior corneal astigmatism less than 2.50 diopters (D) were evaluated. The distance between the incision wound and the corneal apex was measured using the Pentacam (Oculus Optikgeräte, Wetzlar, Germany) Scheimpflug image and the Image J program (National Institutes of Health, Bethesda, MD)...
July 1, 2017: Journal of Refractive Surgery
https://www.readbyqxmd.com/read/28681903/contralateral-eye-comparison-of-smile-and-flap-based-corneal-refractive-surgery-computational-analysis-of-biomechanical-impact
#11
Ibrahim Seven, Ali Vahdati, Iben Bach Pedersen, Anders Vestergaard, Jesper Hjortdal, Cynthia J Roberts, William J Dupps
PURPOSE: Computational analyses were performed to quantify and directly compare the biomechanical impact of flapless and flap-based procedures in a series of patients undergoing small incision lenticule extraction (SMILE) in one eye and flap-based femtosecond lenticule extraction in the other. METHODS: Tomographic data from 10 eyes of 5 patients undergoing femtosecond laser refractive lenticule extraction for myopic astigmatism with or without a stromal flap (femtosecond lenticule extraction in one eye, SMILE in the contralateral eye) were used to generate computational models...
July 1, 2017: Journal of Refractive Surgery
https://www.readbyqxmd.com/read/28681436/human-eyes-do-not-need-monochromatic-aberrations-for-dynamic-accommodation
#12
Paula Bernal-Molina, Iván Marín-Franch, Antonio J Del Águila-Carrasco, Jose J Esteve-Taboada, Norberto López-Gil, Philip B Kruger, Robert Montés-Micó
PURPOSE: To determine if human accommodation uses the eye's own monochromatic aberrations to track dynamic accommodative stimuli. METHODS: Wavefront aberrations were measured while subjects monocularly viewed a monochromatic Maltese cross moving sinusoidally around 2D of accommodative demand with 1D amplitude at 0.2 Hz. The amplitude and phase (delay) of the accommodation response were compared to the actual vergence of the stimulus to obtain gain and temporal phase, calculated from wavefront aberrations recorded over time during experimental trials...
July 5, 2017: Ophthalmic & Physiological Optics: the Journal of the British College of Ophthalmic Opticians (Optometrists)
https://www.readbyqxmd.com/read/28680704/small-incision-lenticule-extraction-for-correction-of-myopia-and-myopic-astigmatism-first-24-hour-outcomes
#13
Taixiang Liu, Tingting Dan, Yan Luo
PURPOSE: To observe the first 24-hour (h) outcomes of the small incision lenticule extraction procedure (SMILE) for myopia and myopic astigmatism. METHODS: Fifty-three eyes (27 patients) scheduled for SMILE were followed immediately (0 h), 2, 4, 6, and 24 h after SMILE. Uncorrected visual acuity (UCVA), conjunctival congestion, pain level, and corneal edema, thickness, and densitometry were recorded. RESULTS: At 2 h after SMILE, 15.1% of eyes had ≤0...
2017: Journal of Ophthalmology
https://www.readbyqxmd.com/read/28676989/in-vivo-and-ex-vivo-evaluation-of-cell-cell-interactions-adhesion-and-migration-in-ocular-surface-of-patients-undergone-excimer-laser-refractive-surgery-after-topical-therapy-with-different-lubricant-eyedrops
#14
Roberta Calienno, Claudia Curcio, Manuela Lanzini, Mario Nubile, Leonardo Mastropasqua
PURPOSE: To investigate, in vivo by means of in vivo confocal microscopy (IVCM) and ex vivo by impression cytology, epithelial cellular damage after excimer laser refractive surgery in patients under different topical lubricant therapies. METHODS: Two hundred eyes of 100 patients, undergone bilateral excimer laser refractive surgery for medium myopic error correction [spherical equivalent refraction from -1.75 to -3.50 dioptres (D) with refractive astigmatism under -0...
July 4, 2017: International Ophthalmology
https://www.readbyqxmd.com/read/28669100/long-term-evaluation-of-refractive-changes-in-eyes-of-preterm-children-a-6-year-follow-up-study
#15
Mahmut Kaya, Ayse Tulin Berk, Aylin Yaman
PURPOSE: To investigate the longitudinal changes in refractive errors in preterm children with and without retinopathy of prematurity (ROP) in the first 6 years of life. METHODS: We included 226 preterm children with a gestational age of ≤34 weeks: 222 eyes with no ROP, 73 eyes with mild ROP and 145 eyes with severe ROP. Longitudinal cycloplegic refraction data were collected initially and yearly thereafter until 6 years of age. RESULTS: Eyes in the severe ROP group showed an increase in myopia values between the 1- and 3-year examinations (p = 0...
July 1, 2017: International Ophthalmology
https://www.readbyqxmd.com/read/28664906/identification-of-pterygium-related-mrna-expression-profiling-by-microarray-analysis
#16
J Liu, X Ding, L Yuan, X Zhang
PurposePterygium is a common degenerative and proliferative disease of the ocular surface. In some severe cases, pterygium may lead to irregular corneal astigmatism and corneal stromal scarring with visual impairment. The proliferative capacities of pterygial cells make them appear similar to tumorigenesis. Although considerable progress has been made towards understanding the etiology of the disease, the pathogenesis of pterygium has not been completely understood. In our previous study, we constructed pterygium-related lncRNA libraries by using microarray to investigate the potential roles of lncRNAs in pterygium...
June 30, 2017: Eye
https://www.readbyqxmd.com/read/28664589/high-myopic-astigmatism-secondary-to-des%C3%A3-emet-s-membrane-tears-after-forceps-assisted-delivery
#17
Joanna Siwiec-Prościńska, Justyna Szczapa-Jagustyn, Anna Gotz-Więckowska, Jarosław Kocięcki
No abstract text is available yet for this article.
June 29, 2017: Clinical & Experimental Optometry: Journal of the Australian Optometrical Association
https://www.readbyqxmd.com/read/28664572/the-use-of-contact-lenses-in-low-vision-rehabilitation-optical-and-therapeutic-applications
#18
REVIEW
Stephen J Vincent
Ocular pathology that manifests at an early age has the potential to alter the vision-dependent emmetropisation mechanism, which co-ordinates ocular growth throughout childhood. The disruption of this feedback mechanism in children with congenital or early-onset visual impairment often results in the development of significant ametropia, including high levels of spherical refractive error, astigmatism and anisometropia. This review examines the use of contact lenses as a refractive correction, low vision aid and therapeutic intervention in the rehabilitation of patients with bilateral, irreversible visual loss due to congenital ocular disease...
June 29, 2017: Clinical & Experimental Optometry: Journal of the Australian Optometrical Association
https://www.readbyqxmd.com/read/28658437/indications-and-visual-outcomes-of-intrastromal-corneal-ring-segment-implantation-in-a-large-patient-series
#19
Taíse Tognon, Mauro Campos, João Paulo Wengrzynovski, Kleyton Arlindo Barella, Adriano Pasqualotti, Luiz Antônio de Brito Martins, Adriana Dos Santos Forseto, Luciene Barbosa de Sousa
OBJECTIVES: To describe the indications for and visual outcomes of intrastromal corneal ring segment implantation. METHODS: A large retrospective case-series chart-review study was conducted using Sorocaba Ophthalmological Hospital medical records. This study included 1222 eyes (1196 patients) that were surgically treated between November 2009 and December 2012. The following preoperative data were collected: age, gender, type of medical care and funding source, surgical technique, best-corrected visual acuity, manifest sphere and cylinder refractive error, maximum and minimum central keratometry, and pachymetry measurements of the cornea at the thinnest point and at the ring channel...
June 2017: Clinics
https://www.readbyqxmd.com/read/28657533/-the-ametrop%C3%A3-as-updated-review-for-non-ophthalmologists-physicians
#20
REVIEW
Virgilio Galvis, Alejandro Tello, Oscar Blanco, Andrea N Laiton, Marion R Dueñas, Priscila Alejandra Hidalgo
Refractive errors are caused by a decoupling of the power of convergence of the eye lens, the cornea and lens, which make the rays reaching the eye to focus and generate an image, and the retina, which is the biological photosensitive screen where the image will be transformed into a nerve impulse. These defects include myopia, hyperopia and astigmatism. Presbyopia can also be considered a refractive defect, but of special features, since only affects near vision in patients older than 40 years. By altering the quality of the focused image on the most sensitive area of the retina (the macula), they decrease visual acuity...
2017: Revista de la Facultad de Ciencias Médicas
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