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https://www.readbyqxmd.com/read/28917407/corneal-topography-and-keratometry-changes-after-glued-intraocular-lens-implantation
#1
Dhivya Ashok Kumar, Harspreet Kaur, Amar Agarwal, Sajitha Selvaraj, Sathish Kumar Pandian, Vamsi Chintalpati
PURPOSE: To analyze the alterations in corneal topography and keratometry (K) after glued transscleral-fixated intraocular lens (IOL) implantation. SETTING: Dr. Agarwal's Eye Hospital, Chennai, India. DESIGN: Prospective case series. METHODS: Eyes having glued IOL implantation for aphakia or subluxated lens (>180 degrees) were included. Preoperative autorefractometer and corneal topography was performed. Intraoperative parameters, namely the type, position, and incision size, flap position, and number of sutures were noted...
August 2017: Journal of Cataract and Refractive Surgery
https://www.readbyqxmd.com/read/28917405/comparison-of-refractive-and-keratometric-astigmatism-after-microincision-cataract%C3%A2-surgery
#2
Atsushi Kawahara, Yoshinori Takayanagi
PURPOSE: To measure the correlation between refractive and keratometric astigmatism after microincision cataract surgery (MICS). SETTING: Takayanagi Clinic, Kushiro, Hokkaido, Japan. DESIGN: Retrospective case series. METHODS: This study evaluated patients having phacoemulsification and intraocular lens implantation through a 2.0 mm temporal clear corneal incision. Refractive astigmatism and keratometric astigmatism were described by Jackson cross-cylinder with-the-rule (J0) and oblique (J45) components and compared using linear regression analysis...
August 2017: Journal of Cataract and Refractive Surgery
https://www.readbyqxmd.com/read/28917397/evaluation-of-postoperative-toric-intraocular-lens-alignment-with-anterior-segment-optical-coherence-tomography
#3
Andrea Lucisano, Marco Ferrise, Marco Balestrieri, Massimo Busin, Vincenzo Scorcia
We describe the use of a simple tool to evaluate the postoperative alignment of toric intraocular lenses (IOLs). The entire anterior segment is scanned using anterior segment optical coherence tomography and analyzed with an internal dedicated tool. A topographic map is displayed along with an anterior segment image, including a linear axis marker centered on the corneal apex. The marker can be rotated until it is aligned with the line connecting the IOL marking dots, precisely reproducing the IOL astigmatic axis, which is measured in angle degrees...
August 2017: Journal of Cataract and Refractive Surgery
https://www.readbyqxmd.com/read/28916725/characterization-of-enhancers-and-the-role-of-the-transcription-factor-klf7-in-regulating-corneal-epithelial-differentiation
#4
Rachel Herndon Klein, William Hu, Ghaidaa Kashgari, Ziguang Lin, Tuyen Nguyen, Michael Doan, Bogi Andersen
During tissue development, transcription factors bind regulatory DNA regions called enhancers, often located at great distances from the genes they regulate, to control gene expression. The enhancer landscape during embryonic stem cell differentiation has been well characterized. By contrast, little is known about the shared and unique enhancer regulatory mechanisms in different ectodermally derived epithelial cells. Here, we use ChIP-seq to identify domains enriched for histone marks H3K4me3, H3K4me1, and H3K27ac, and define for the first time the super enhancers and typical enhancers active in primary human corneal epithelial cells...
September 15, 2017: Journal of Biological Chemistry
https://www.readbyqxmd.com/read/28914632/stepwise-guided-photorefractive-keratectomy-in-treatment-of-irregular-astigmatism-after-penetrating-keratoplasty-and-deep-anterior-lamellar-keratoplasty
#5
Nir Sorkin, Adi Einan-Lifshitz, Sagi Abelson, Tanguy Boutin, Mahmood Showail, Armand Borovik, Zach Ashkenazy, Clara C Chan, David S Rootman
PURPOSE: To report the outcome of stepwise ablation using topography-guided photorefractive keratectomy to treat irregular astigmatism after either penetrating keratoplasty (PKP) or deep anterior lamellar keratoplasty (DALK). METHODS: This is a retrospective, interventional analysis including patients with irregular astigmatism after either PKP or DALK, who underwent topography-guided photorefractive keratectomy. The entire cohort was analyzed, as well as the PKP and DALK groups separately...
September 12, 2017: Cornea
https://www.readbyqxmd.com/read/28905827/refractive-and-ocular-biometric-profile-of-children-with-a-history-of-laser-treatment-for-retinopathy-of-prematurity
#6
Savleen Kaur, Jaspreet Sukhija, Deeksha Katoch, Mansi Sharma, Ramanuj Samanta, Mangat R Dogra
PURPOSE: Indian children belong to a diverse socioeconomic strata with retinopathy of prematurity (ROP) developing in mature, higher birth weight babies as well. The purpose of our study is to analyze the long-term status of refractive errors and its relationship with ocular biometry in children with ROP who were laser treated at a tertiary center in North India. METHODS: Cross sectional study. Children (<16 years) enrolled from January 2014 to December 2014 with a history of laser treatment for ROP and examined for refractive and biometric status...
September 2017: Indian Journal of Ophthalmology
https://www.readbyqxmd.com/read/28902771/attention-and-visual-motor-integration-in-young-children-with-uncorrected-hyperopia
#7
Marjean Taylor Kulp, Elise Ciner, Maureen Maguire, Maxwell Pistilli, T Rowan Candy, Gui-Shuang Ying, Graham Quinn, Lynn Cyert, Bruce Moore
SIGNIFICANCE: Among 4- and 5-year-old children, deficits in measures of attention, visual-motor integration (VMI) and visual perception (VP) are associated with moderate, uncorrected hyperopia (3 to 6 diopters [D]) accompanied by reduced near visual function (near visual acuity worse than 20/40 or stereoacuity worse than 240 seconds of arc). PURPOSE: To compare attention, visual motor, and visual perceptual skills in uncorrected hyperopes and emmetropes attending preschool or kindergarten and evaluate their associations with visual function...
September 11, 2017: Optometry and Vision Science: Official Publication of the American Academy of Optometry
https://www.readbyqxmd.com/read/28902719/wound-closure-and-tissue-adhesives-in-clear-corneal-incision-cataract-surgery
#8
Amy Y Tong, Preeya K Gupta, Terry Kim
PURPOSE OF REVIEW: Achieving secure wound closure in clear corneal incision cataract surgery remains highly desired for its role in reducing infection risk and leak-related complications, including hypotony, corneal edema, and lens dislocation. Although classic techniques of stromal hydration or wound suturing represent traditional approaches, the introduction of newer and more effective ocular surface adhesives has increased the options that are available. This review aims to provide an update on the peer-reviewed literature regarding wound closure and the currently available and investigational tissue adhesives used to seal clear corneal incisions in cataract surgery...
September 11, 2017: Current Opinion in Ophthalmology
https://www.readbyqxmd.com/read/28900712/-starflo-a-suprachoroidal-drainage-implant-in-glaucoma-surgery
#9
S König, C W Hirneiß
BACKGROUND: The STARflo Glaucoma Device (iSTAR Medical, Wavre, Belgium) offers a new approach to bleb-free filtering surgery in which the intraocular pressure (IOP) is lowered by supporting outflow of the aqueous humor into the suprachoroidal space. MATERIALS AND METHODS: On the basis of a case series of 9 patients with open-angle glaucoma (OAG) unmanageable by drug-based treatment, intra- and postoperative experiences with the implant are presented. The implant, the implantation procedure, and the first results 6 months postoperatively are described...
September 12, 2017: Der Ophthalmologe: Zeitschrift der Deutschen Ophthalmologischen Gesellschaft
https://www.readbyqxmd.com/read/28900109/region-specific-differential-corneal-and-scleral-mrna-expressions-of-mmp2-timp2-and-tgfb2-in-highly-myopic-astigmatic-chicks
#10
Lisa Yan-Yan Xi, Shea Ping Yip, Sze Wan Shan, Jody Summers-Rada, Chea-Su Kee
Myopia and astigmatism, two common refractive errors frequently co-exist, are affecting vision at all working distances in the affected populations worldwide. Eyeballs having these refractive errors are known to exhibit abnormal eye shape at the anterior and posterior eye segments, but whether the outer coats of these abnormal eyeballs, cornea anteriorly and sclera posteriorly, are regulated by region-specific molecular mechanism remains unclear. Here we presented the changes in mRNA expression levels of three genes (MMP2, TIMP2, and TGFB2), all known to participate in extracellular matrix organization, at five regions of the cornea and sclera in chickens developing high myopia and astigmatism induced by form deprivation...
September 12, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28887859/association-between-mode-of-delivery-and-astigmatism-in-preschool-children
#11
Fengyang Liu, Xubo Yang, Angcang Tang, Longqian Liu
PURPOSE: To determine whether mode of delivery has any impact on astigmatism. METHODS: This case-control study was performed in the Department of Ophthalmology in 2015. Exposure was mode of delivery [vaginal delivery (VD) or caesarean section (CS), which here included both elective and emergency CS]. Outcome was astigmatism (≥2.5 D), which was determined by cycloplegic refraction. Odds ratios (ORs) and 95% confidence intervals (95% CIs) were computed to assess the associations between mode of delivery and astigmatism from logistic regression models...
September 9, 2017: Acta Ophthalmologica
https://www.readbyqxmd.com/read/28885667/variations-in-retinal-nerve-fiber-layer-measurements-on-optical-coherence-tomography-after-implantation-of-trifocal-intraocular-lens
#12
Javier García-Bella, José M Martínez de la Casa, Paula Talavero González, José I Fernández-Vigo Escribano, Laura Valcarce Rial, Julián García-Feijóo
PURPOSE: To establish the changes produced after implantation of a trifocal intraocular lens (IOL) on retinal nerve fiber layer measurements performed with Fourier-domain optical coherence tomography (OCT). METHODS: This prospective study included 100 eyes of 50 patients with bilateral cataract in surgical range, no other associated ocular involvement, refractive errors between +5 and -5 spherical diopters, and less than 1.5 D of corneal astigmatism. The eyes were operated by phacoemulsification with implantation of 2 different trifocal IOLs (FineVision and AT LISA tri 839MP) in randomized equal groups...
September 5, 2017: European Journal of Ophthalmology
https://www.readbyqxmd.com/read/28880340/topography-guided-photorefractive-keratectomy-in-the-treatment-of-corneal-scarring
#13
Nir Sorkin, Adi Einan-Lifshitz, Tanguy Boutin, Mahmood Showail, Armand Borovik, Clara C Chan, David S Rootman
PURPOSE: To report the outcome of topography-guided photorefractive keratectomy (TG-PRK) in the treatment of patients with corneal scarring. METHODS: A retrospective, interventional case series including 6 eyes of 6 patients with corneal scarring and irregular astigmatism who underwent TG-PRK. The etiologies for scarring were: infectious corneal ulcers, foreign body trauma, LASIK flap buttonhole, and lamellar keratoplasties performed to correct corneal perforation secondary to corneal melting...
September 1, 2017: Journal of Refractive Surgery
https://www.readbyqxmd.com/read/28880335/refractive-outcomes-of-20-eyes-undergoing-icl-implantation-for-correction-of-hyperopic-astigmatism
#14
Efekan Coskunseven, Isilay Kavadarli, Onurcan Sahin, Belma Kayhan, Ioannis Pallikaris
PURPOSE: To analyze 1-week, 1-month, and 12-month postoperative refractive outcomes of eyes that under-went ICL implantation to correct hyperopic astigmatism. METHODS: The study enrolled 20 eyes of patients with an average age of 32 years (range: 21 to 40 years). The outcomes of spherical and cylindrical refraction, uncorrected distance visual acuity (UDVA), corrected distance visual acuity (CDVA), vault, and angle parameters were evaluated 1 week, 1 month, and 12 months postoperatively...
September 1, 2017: Journal of Refractive Surgery
https://www.readbyqxmd.com/read/28880332/a-technique-to-reduce-incidence-of-opaque-bubble-layer-formation-during-lasik-flap-creation-using-the-visumax-femtosecond-laser
#15
Ningling Wu, Joseph G Christenbury, Jon G Dishler, Tahir Kansu Bozkurt, Daniel Duel, Lijun Zhang, D Rex Hamilton
PURPOSE: To identify risk factors for opaque bubble layer (OBL) formation and compare the incidence of OBL using a cone modification technique versus the original technique for LASIK flap creation using the VisuMax laser (Carl Zeiss Meditec, Jena, Germany). METHODS: This retrospective study examined videos of flap creation using the VisuMax laser to identify OBL occurrence. Eyes were divided into three groups: eyes where OBL occurred using the original technique (OBL group), eyes where OBL did not occur using the original technique (no OBL group), and eyes in which the cone modification technique was used for LASIK flap creation (larger flap diameter) (cone modification technique group)...
September 1, 2017: Journal of Refractive Surgery
https://www.readbyqxmd.com/read/28879667/clinical-biomicroscopy-and-retinoscopy-findings-of-keratoconus-in-a-middle-eastern-population
#16
Mohammad Naderan, Ali Jahanrad, Mahgol Farjadnia
BACKGROUND: The present work was conducted to investigate the prevalence of clinical biomicroscopy and retinoscopy findings of corneas with keratoconus (KC) at first presentation and their relationship with disease severity. METHOD: In a prospective cross-sectional study, 371 consecutive KC patients were examined by slitlamp biomicroscopy and retinoscopy at the time of diagnosis. This research evaluates the prevalence of clinical findings such as a corneal protrusion, Vogt's striae, Fleischer's ring, Munson's sign, Rizzuti's sign, corneal scars, as well as any additional KC signs such as prominent nerve fibres, scissoring reflex and Charleaux 'oil droplet' sign on retinoscopy...
September 6, 2017: Clinical & Experimental Optometry: Journal of the Australian Optometrical Association
https://www.readbyqxmd.com/read/28875250/effect-of-iris-registration-on-outcomes-of-femtolasik-for-myopia-and-myopic-astigmatism
#17
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/28868034/correction-of-high-astigmatism-after-penetrating-keratoplasty-with-toric-multifocal-intraocular-lens-implantation
#18
Raffaele Nuzzi, Francesca Monteu
After penetrating keratoplasty (PK), high astigmatism is often induced, being frequently about 4-6 dpt. According to the entity and typology of astigmatism, different methods of correction can be used. Selective suture removal, relaxing incisions, wedge resections, compression sutures, photorefractive keratectomy, and laser-assisted in situ keratomileusis can reduce corneal astigmatism and ametropia, but meanwhile they can cause a reduction in the corneal integrity and cause an over- or undercorrection. In case of moderate-to-high regular astigmatisms, the authors propose a toric multifocal intraocular lens (IOL) implantation to preserve the corneal integrity (especially in PK after herpetic corneal leukoma keratitis)...
May 2017: Case Reports in Ophthalmology
https://www.readbyqxmd.com/read/28863654/note-measurement-of-synchrotron-radiation-phase-space-beam-properties-to-verify-astigmatism-compensation-in-fresnel-zone-plate-focusing-optics
#19
Yasushi Kagoshima, Takamasa Miyagawa, Saki Kagawa, Shingo Takeda, Hidekazu Takano
The intensity distribution in phase space of an X-ray synchrotron radiation beamline was measured using a pinhole camera method, in order to verify astigmatism compensation by a Fresnel zone plate focusing optical system. The beamline is equipped with a silicon double crystal monochromator. The beam size and divergence at an arbitrary distance were estimated. It was found that the virtual source point was largely different between the vertical and horizontal directions, which is probably caused by thermal distortion of the monochromator crystal...
August 2017: Review of Scientific Instruments
https://www.readbyqxmd.com/read/28861357/the-evolution-of-refractive-status-in-chinese-infants-during-the-first-year-of-life-and-its-affected-factors
#20
Shu-Juan Yu, Guo-Hua Liu, Yi Liu, Jing Huang, Ming-Lei Han, Bo-Jun Zhao, Zhong-Tao Gai
AIM: To study the evolution of the refractive status and examine the affected factors in infants during the first year of life in a large sample size in China. METHODS: A total of 1258 babies (2516 eyes) aged 32wk gestational age to 1y participated in the study, including 766 premature and 492 full-term infants. First, each baby received an orthoptic examination, slit-lamp checking and fundus imaging. Patients with diseases which might affect refractive status were excluded from the cohort...
2017: International Journal of Ophthalmology
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