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https://www.readbyqxmd.com/read/29675386/comparison-of-myopia-control-between-toric-and-spherical-periphery-design-orthokeratology-in-myopic-children-with-moderate-to-high-corneal-astigmatism
#1
Yu Zhang, Yue-Guo Chen
AIM: To compare clinical results between toric and spherical periphery design orthokeratology (ortho-k) in myopic children with moderate-to-high corneal astigmatism. METHODS: This retrospective study enrolled 62 eyes of 62 subjects using toric ortho-k lenses. These subjects were assigned to the toric group. Based on the one-to-one match principle (same age, proximate spherical equivalence and corneal astigmatism), 62 eyes of 62 subjects were enrolled and included in the spherical group...
2018: International Journal of Ophthalmology
https://www.readbyqxmd.com/read/29675379/photorefractive-keratectomy-after-cataract-surgery-in-uncommon-cases-long-term-results
#2
Anna Maria Roszkowska, Mario Urso, Giuseppe Alberto Signorino, Leopoldo Spadea, Pasquale Aragona
AIM: To evaluate the efficacy and safety of the excimer laser correction of the residual refractive errors after cataract extraction with intraocular lens (IOL) implantation in uncommon cases. METHODS: Totally 24 patients with high residual refractive error after cataract surgery with IOL implantation were examined. Twenty-two patients had a history of phacoemulsification and IOL implantation, and two had extra-capsular cataract extraction with IOL implantation...
2018: International Journal of Ophthalmology
https://www.readbyqxmd.com/read/29655781/the-hyperopic-effect-of-narrow-band-long-wavelength-light-in-tree-shrews-increases-non-linearly-with-duration
#3
Alexander H Ward, Thomas T Norton, Carrie E Huisingh, Timothy J Gawne
During postnatal refractive development, an emmetropization mechanism uses refractive error to modulate the growth rate of the eye. Hyperopia (image focused behind the retina) produces what has been described as "GO" signaling that increases growth. Myopia (image focused in front of the retina) produces "STOP" signaling that slows growth. The interaction between GO and STOP conditions is non-linear; brief daily exposure to STOP counteracts long periods of GO. In young tree shrews, long-wavelength (red) light, presented 14 h per day, also appears to produce STOP signals...
April 12, 2018: Vision Research
https://www.readbyqxmd.com/read/29625482/distribution-pattern-of-choroidal-thickness-at-the-posterior-pole-in-chinese-children-with-myopia
#4
Junjie Deng, Xiaoli Li, Jiali Jin, Bo Zhang, Jianfeng Zhu, Haidong Zou, Xun Xu, Jingbo Xie, Ling Wang, Shaopin Zhu, Xiangui He
Purpose: To determine the relationship between choroidal thickness (ChT) at the posterior pole and refractive error and to explore the difference between the macular and peripapillary regions in children with myopia. Methods: A total of 340 healthy Chinese children underwent a series of comprehensive ocular examinations including cycloplegic refraction. Swept-source optical coherence tomography was used to measure the ChT in the macular and peripapillary regions...
March 1, 2018: Investigative Ophthalmology & Visual Science
https://www.readbyqxmd.com/read/29625459/beyond-hyperglycemia-evidence-for-retinal-neurodegeneration-in-metabolic-syndrome
#5
Cagatay Karaca, Zuleyha Karaca
Purpose: We evaluated the retinal effects of systemic metabolic changes clustered under the umbrella of metabolic syndrome (MetS) in comparison with age-matched healthy subjects. Methods: Spectral-domain optical coherence tomography (OCT) retinal segmentation analysis of 29 patients with MetS and 36 control subjects was performed. Patients with diabetes mellitus (DM), uncontrolled hypertension, retinopathy, high myopia or hyperopia, and posterior segment surgery, were excluded from analysis...
March 1, 2018: Investigative Ophthalmology & Visual Science
https://www.readbyqxmd.com/read/29608907/m-to-l-cone-ratios-determine-eye-sizes-and-baseline-refractions-in-chickens
#6
Sandra Gisbert, Frank Schaeffel
Following a hypothesis raised by M. and J. Neitz, Seattle, we have tested whether the abundance and the ratio of Long wavelength-sensitive (L) to Middle wavelength-sensitive (M) cones may affect eye size and development of myopia in the chicken. Fourteen chickens were treated with frosted plastic diffusers in front of one eye on day 10 post-hatching for a period of 7 days to induce deprivation myopia. Ocular dimensions were measured by A-scan ultrasonography at the beginning and at the end of the treatment and development of refractive state was tracked using infrared photorefraction...
March 30, 2018: Experimental Eye Research
https://www.readbyqxmd.com/read/29607215/calculation-of-unknown-preoperative-k-readings-in-postrefractive-surgery-patients
#7
Nicola Rosa, Maddalena De Bernardo, Maria Borrelli
Purpose: To determine the unknown preoperative K readings (Kpre) to be used in history-based methods, for intraocular lens (IOL) power calculation in patients who have undergone myopic photorefractive keratectomy (PRK). Methods: A regression formula generated from the left eyes of 174 patients who had undergone PRK for myopia or for myopic astigmatism was compared with other methods in 168 right eyes. The Pearson index and paired t -test were utilized for statistical analysis...
2018: Journal of Ophthalmology
https://www.readbyqxmd.com/read/29604230/prostaglandin-f2%C3%AE-receptor-modulation-affects-eye-development-in-guinea-pigs
#8
Jinglei Yang, Miaozhen Pan, Peter S Reinach, Rongfang Chen, Lan Yu, Feng Zhou, Sen Zhang, Jia Qu, Xiangtian Zhou
Retinal arachidonic acid (ARA) levels in form-deprived eyes decline in guinea pigs. As prostaglandin F2α (PGF2α) is an ARA metabolite and endogenous agonist of prostaglandin F receptor (FP), we hypothesized that down-regulation of PGF2α-FP receptor signalling pathway contributes to myopia onset. To test this hypothesis, this study determines if: a) retinal PGF2α levels decline during development of form deprivation myopia (FDM) in guinea pigs; b) FP receptor agonism and antagonism alter emmetropization and myopia development...
March 31, 2018: Basic & Clinical Pharmacology & Toxicology
https://www.readbyqxmd.com/read/29600174/outcomes-of-transconjunctival-sutureless-27-gauge-vitrectomy-for-vitreoretinal-diseases
#9
Jie Li, San-Mei Liu, Wen-Tao Dong, Fang Li, Cai-Hong Zhou, Xiao-Dan Xu, Jie Zhong
AIM: To evaluate the safety and efficacy profile of 27-gauge (27G) pars plana vitrectomy (PPV) for the treatment of various vitreoretinal diseases. METHODS: The clinical outcomes of 61 eyes (58 patients) with various vitreoretinal diseases following 27G PPV were retrospectively reviewed. RESULTS: Surgical indications included rhegmatogenous retinal detachment ( n =24), full-thickness macular hole ( n =12), diabetic retinopathy ( n =11), vitreous hemorrhage ( n =6), Eales disease ( n =4), pathological myopia-related vitreous floater ( n =2), and macular epiretinal membrane ( n =2)...
2018: International Journal of Ophthalmology
https://www.readbyqxmd.com/read/29564655/template-based-methodology-for-the-simulation-of-intracorneal-segment-ring-implantation-in-human-corneas
#10
REVIEW
Julio Flecha-Lescún, Begoña Calvo, Jesús Zurita, Miguel Ángel Ariza-Gracia
Keratoconus is an idiopathic, non-inflammatory and degenerative corneal disease characterised by a loss of the organisation in the corneal collagen fibrils. As a result, keratoconic corneas present a localised thinning and conical protrusion with irregular astigmatism and high myopia that worsen visual acuity. Intracorneal ring segments (ICRSs) are used in clinic to regularise the corneal surface and to prevent the disease from progressing. Unfortunately, the post-surgical effect of the ICRS is not explicitly accounted beforehand...
March 21, 2018: Biomechanics and Modeling in Mechanobiology
https://www.readbyqxmd.com/read/29564358/influence-of-overnight-orthokeratology-lens-fitting-decentration-on-corneal-topography-reshaping
#11
Jiaojie Chen, Wei Huang, Rong Zhu, Jun Jiang, Yiyu Li
Background: This retrospective study was designed to investigate the sole influence of orthokeratology (OK) lens fitting decentration on the Zernike coefficients of the reshaped anterior corneal surface. Methods: This study comprised a review of 106 right eyes and measurements of corneal topography both before OK and at 1-month follow-up visit. A routine was designed to calculate local corneal surface astigmatism and assist the determination of OK lens fitting decentration from pupil center...
2018: Eye and Vision (London, England)
https://www.readbyqxmd.com/read/29554811/early-glycaemic-control-for-maintaining-visual-function-in-type-1-diabetes-the-oulu-cohort-study-of-diabetic-retinopathy
#12
Nina Hautala, Mira Siiskonen, Virva Hannula, Kaisu Järvinen, Aura Falck
PURPOSE: The purpose of this study was to evaluate the visual function and the ophthalmic status of young Finnish adults with long duration of type 1 diabetes in relation to the history of the metabolic control. METHODS: A population-based cohort of children with type 1 diabetes examined in the Northern Ostrobothnia hospital district in 1989 (n = 216) was re-examined 18 years later. High-contrast visual acuity (best-corrected visual acuity), contrast sensitivity, refractive error, lens status, intraocular pressure, stage of diabetic retinopathy and received treatments were evaluated...
March 1, 2018: European Journal of Ophthalmology
https://www.readbyqxmd.com/read/29554028/drug-to-prevent-pediatric-myopia-what-would-it-take
#13
Gary D Novack
Because of the epidemic of myopia with both its short-term and long-term effects, we desperately need ways to slow myopic progression. In this study which was part of a myopia prevention symposium, the author answers the following question: Assuming that researchers did come up with a pharmacological treatment to slow myopic progression-what would it take to obtain regulatory approval from the United States Food and Drug Administration (FDA)? Previous publicly available information (a 2003 FDA advisory committee on this topic, International Conference on Harmonisation guidances on drug development, and published articles) as well as the author's experience is used...
March 16, 2018: Eye & Contact Lens
https://www.readbyqxmd.com/read/29522226/nepafenac-ophthalmic-suspension-0-3-for-the-management-of-ocular-pain-after-photorefractive-keratectomy
#14
George A Kontadakis, Konstantina G Chronopoulou, Rodoula Tsopouridou, David Tabibian, George D Kymionis
PURPOSE: To investigate the effect of nepafenac 0.3% in a once daily dosage regarding pain and healing after photorefractive keratectomy (PRK). METHODS: This was a prospective, comparative, contralateral randomized study of 35 patients undergoing PRK for the correction of low to moderate myopia and myopic astigmatism. After randomization, patients received nepafenac 0.3% ophthalmic suspension once daily in one eye (nepafenac 0.3% group) and nepafenac 0.1% ophthalmic suspension three times a day in the other eye (nepafenac 0...
March 1, 2018: Journal of Refractive Surgery
https://www.readbyqxmd.com/read/29522224/clinical-outcomes-of-smile-with-a-triple-centration-technique-and-corneal-wavefront-guided-transepithelial-prk-in-high-astigmatism
#15
Ikhyun Jun, David Sung Yong Kang, Dan Z Reinstein, Samuel Arba-Mosquera, Timothy J Archer, Kyoung Yul Seo, Tae-Im Kim
PURPOSE: To comparatively investigate the clinical outcomes, vector parameters, and corneal aberrations of small incision lenticule extraction (SMILE) with a triple centration technique and corneal wavefront-guided transepithelial photorefractive keratectomy (PRK) for the correction of high astigmatism. METHODS: This retrospective, comparative case series study included 89 eyes (89 patients) that received treatment for myopia with high astigmatism (≥ 2.50 diopters) using SMILE with a triple centration technique (SMILE group; 45 eyes) and corneal wavefront-guided transepithelial PRK (transepithelial PRK group; 44 eyes)...
March 1, 2018: Journal of Refractive Surgery
https://www.readbyqxmd.com/read/29488240/optical-and-pharmacological-strategies-of-myopia-control
#16
REVIEW
Pauline Kang
Recent increases in global myopia prevalence rates have raised significant concerns as myopia increases the lifelong risk of various sight-threatening ocular conditions. This growing public health burden has generated significant research interests into understanding both its aetiology and developing effective methods to slow down or stop its development, methods collectively termed 'myopia control'. The growing body of research has demonstrated benefits of various optical and pharmacological treatments resulting in myopia control management increasingly becoming a part of main stream clinical practice...
February 28, 2018: Clinical & Experimental Optometry: Journal of the Australian Optometrical Association
https://www.readbyqxmd.com/read/29482709/a-rare-presentation-of-cyclitis-induced-myopia
#17
Umar Ijaz, Asad Habib, Hassan Sajjad Rathore
Unilateral cyclitis leading to myopia is a rare and clinical relevant entity. In clinical settings, pseudomyopia is generally encountered in the form of accommodative spasm, which is always bilateral. Cyclitis due to inflammation, on the other hand, can cause pseudomyopia unilaterally and it is a very rare presentation. A young male with acute anterior uveitis, presented with acute episode of unilateral myopia. When patient was examined on first visit, there were no cells in anterior chamber; so he was started on cycloplegic eye drops, but his condition didn't improve...
March 2018: Journal of the College of Physicians and Surgeons—Pakistan: JCPSP
https://www.readbyqxmd.com/read/29473357/-clinical-observation-of-zheng-s-stunt-needling-technique-in-the-treatment-of-juvenile-myopia
#18
Xinglan Li, Huazhi Zhang, Tingzhuo Zhang, Bo Yuan, Liang Tian, Fengfan Zhang, Yixin Wang, Xiang Qiao, Xiaozheng Du
OBJECTIVE: To compare the differences in the clinical therapeutic effects on juvenile myopia between Zheng 's stunt needling technique and traditional even needling technique. METHODS: A total of 166 cases of mild juvenile myopia (diopter <-3.00D) were randomized into an observation group ( Zheng 's stunt needling technique) and a control group (traditional even needling technique), 83 cases in each one (166 affected eyes). Taiyang (EX-HN 5), Fengchi (GB 20), Cuanzhu (BL 2), Hegu (LI 4) and Guangming (GB 37) were used in the two groups...
February 12, 2018: Zhongguo Zhen Jiu, Chinese Acupuncture & Moxibustion
https://www.readbyqxmd.com/read/29453727/floating-flap-of-internal-limiting-membrane-in-myopic-macular-hole-surgery
#19
Kenji Yamashiro, Eri Kinoshita-Nakano, Toru Ota, Yoko Jingami, Isao Nakata, Hisako Hayashi
PURPOSE: To evaluate the surgical results of macular hole (MH) in patients with high myopia treated with pars plana vitrectomy (PPV) leaving the internal limiting membrane (ILM) flap floating in vitreous fluid at the edge of the MH. METHODS: Nine highly myopic eyes with MH of nine consecutive patients who underwent PPV were retrospectively evaluated. Three eyes were accompanied by retinal detachment (RD). ILM peeling was performed around the MH and some part of the ILM flap was left attached to the edge of the MH...
February 16, 2018: Graefe's Archive for Clinical and Experimental Ophthalmology
https://www.readbyqxmd.com/read/29446816/atrophic-tear-retinal-detachment-clinical-characteristics-and-surgical-treatment-results-at-long-term
#20
Imen Ammous, Imène Zhioua Braham, Majdi Boukari, Ilhem Mili Boussen, Khalil Errais, Raja Zhioua
AIM: to analyse clinical and epidemiological characteristics of atrophic tear retinal detachment (ATRD) and evaluate anatomical and functional results. METHODS: Retrospective study of 48 cases underwent primary scleral buckling for ATRD. Mean follow up was 80,52 months. RESULTS: ATRD represented 7% of all reghmatogenous RD. Mean age of patients was 38 years and 7 months. Age was less than 40 years in 62,5% of patients. Male predominance was noted...
March 2017: La Tunisie Médicale
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