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Corneal surgery

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https://www.readbyqxmd.com/read/28231267/accuracy-of-optical-biometry-combined-with-placido-disc-corneal-topography-for-intraocular-lens-power-calculation
#1
Giacomo Savini, Kenneth J Hoffer, Piero Barboni, Nicole Balducci, Domenico Schiano-Lomoriello, Pietro Ducoli
PURPOSE: To investigate the accuracy of a new optical biometer for intraocular lens (IOL) power calculation in eyes undergoing cataract surgery. METHODS: Consecutive eyes of patients undergoing cataract surgery with the same IOL model were enrolled in a prospective cohort study. Axial length (AL) and corneal power were measured with an optical biometer based on optical low-coherence interferometry and Placido-disc corneal topography. IOL power was calculated with the Hoffer Q, Holladay 1 and SRK/T formulas...
2017: PloS One
https://www.readbyqxmd.com/read/28225492/clinical-application-of-ticl-implantation-for-ametropia-following-deep-anterior-lamellar-keratoplasty-for-keratoconus-a-consort-compliant-article
#2
Qin Qin, Liping Yang, Zifang He, Zhenping Huang
BACKGROUND: This study aimed to investigate the clinical application of phakic toric intraocular collamer lens (TICL) implantation in treating ametropia following deep anterior lamellar keratoplasty (DALK) for patients with keratoconus, especially the effectiveness and safety of high astigmatism and indications of TICL implantation after corneal transplantation. METHODS: Using the self-controlled case series observation approach, 9 patients with ametropia (9 eyes) who underwent DALK surgery for keratoconus 1...
February 2017: Medicine (Baltimore)
https://www.readbyqxmd.com/read/28223775/a-comparison-of-three-different-corneal-marking-methods-used-to-determine-cyclotorsion-in-the-horizontal-meridian
#3
Hung-Yuan Lin, Yi-Ting Fang, Ya-Jung Chuang, Justin N Karlin, Hsin-Yang Chen, Szu-Yuan Lin, Pi-Jung Lin, Ming Chen
During toric intraocular lens (IOL) implantation, surgeons must take particular care to ensure that inaccurate preoperative measurement and intraoperative misalignment do not cause unexpected postoperative residual astigmatism. This retrospective, comparative case series study aimed to analyze the rotational deviation, or cyclotorsion, of three corneal marking methods: VERION digital marker (VDM; reference), horizontal slit beam marking (HSBM), and subjective direct visual marking (SDVM) on the table (using a bevel knife tip)...
2017: Clinical Ophthalmology
https://www.readbyqxmd.com/read/28222481/effect-of-diquafosol-three-per-cent-ophthalmic-solution-on-tear-film-and-corneal-aberrations-after-cataract-surgery
#4
Hun Lee, Sang Myung Kim, Seonghee Choi, Kyoung Yul Seo, Eung Kweon Kim, Tae-Im Kim
BACKGROUND: The aim was to evaluate the effect of diquafosol on tear film parameters and corneal aberrations after cataract surgery. METHODS: This retrospective, comparative, observational case series included patients who underwent cataract surgery with or without peri-operative use of diquafosol three per cent ophthalmic solution. Patients in group I (31 eyes) were treated with diquafosol three per cent ophthalmic solution six times a day from one week before surgery to three months after surgery...
February 21, 2017: Clinical & Experimental Optometry: Journal of the Australian Optometrical Association
https://www.readbyqxmd.com/read/28222145/cataract-surgery-causes-biomechanical-alterations-to-the-eye-detectable-by-corvis-st-tonometry
#5
Yoshitake Kato, Shunsuke Nakakura, Ryo Asaoka, Kanae Matsuya, Yuki Fujio, Yoshiaki Kiuchi
PURPOSE: Modern cataract surgery is generally considered to bring about modest and sustained intraocular pressure (IOP) reduction. However, the pathophysiological mechanism for this remains unclear. Moreover, a change in ocular biomechanical properties after surgery can affect the measurement of IOP. The aim of the study is to investigate ocular biomechanics, before and following cataract surgery, using Corvis ST tonometry (CST). PATIENTS AND METHODS: Fifty-nine eyes of 59 patients with cataract were analyzed...
2017: PloS One
https://www.readbyqxmd.com/read/28221291/ophthalmic-manifestations-of-facial-dog-bites-in-children
#6
Emily M Bratton, Liliya Golas, Leslie A Wei, Brett W Davies, Vikram D Durairaj
PURPOSE: To characterize ophthalmic manifestations and periocular injuries of pediatric facial dog bites. METHODS: A retrospective review of all children younger than 18 years who sought medical attention after a dog bite to the face between January 1, 2003 and May 22, 2014 was performed at a large tertiary pediatric hospital. Data on type and location of injury, surgical intervention, and complications were collected. RESULTS: A total of 1,989 children aged 0...
February 17, 2017: Ophthalmic Plastic and Reconstructive Surgery
https://www.readbyqxmd.com/read/28220849/the-long-term-anterior-segment-configuration-after-pediatric-cataract-surgery-and-the-association-with-secondary-glaucoma
#7
Ding Chen, Xian-Hui Gong, He Xie, Xue-Ning Zhu, Jin Li, Yun-E Zhao
Secondary glaucoma constitutes major sight-threatening complication of pediatric cataract surgery, yet the etiology remains unclear. The purpose of this study was to investigate the long-term anterior segment configuration and the association with secondary glaucoma in pediatric pseudophakia. Ultrasound biomicroscopy (UBM) was performed on 40 eyes of 26 children underwent pediatric cataract surgery and intraocular lens (IOL) implantation. The anterior chamber depth (ACD), angle-opening distance at 500 μm (AOD500), trabecular-iris angle (TIA), central corneal thickness (CCT), structural abnormities, IOL position, IOP, and incidence of glaucoma were evaluated...
February 21, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28218014/bilateral-otoneurological-pathology-to-operate-or-not
#8
Shivun Khosla, Matthew Elliot, Neil Donnelly
OBJECTIVE: To illustrate our experience when managing a complex patient with potentially life-threatening bilateral otological disease facing multisensory compromise including complete loss of audiovestibular function and visual disturbance Clinical presentation: A 67 year old lady, presented with a large left vestibular schwannoma and extensive right cholesteatoma encircling the otic capsule. She underwent translabyrinthine resection of the vestibular schwannoma, resulting in profound sensorineural hearing loss, vestibular hypofunction and corneal scarring following an initial temporary facial palsy...
February 20, 2017: Cochlear Implants International
https://www.readbyqxmd.com/read/28210183/intraocular-lens-power-overestimation-in-a-patient-with-history-of-circling-keratorraphy
#9
Vasilios F Diakonis, Nilufer Yesilirmak, George D Kymionis, Sonia H Yoo
We report a case of cataract extraction and intraocular lens (IOL) power overestimation in a patient with history of hyperopia managed with circling keratorraphy. A 65-year-old female presented to our institute complaining of decreased vision in both eyes. The patient had a history of bilateral hyperopia that was managed 20 years ago (1994) with circling keratorraphy. At presentation her uncorrected distance visual acuity (UDVA) was 20/70 and 20/60 in her right eye (OD) and left eye (OS), respectively, while her corrected distance visual acuity (CDVA) was 20/25 OD and 20/25 OS with manifest refraction of -0...
July 2016: Saudi Journal of Ophthalmology: Official Journal of the Saudi Ophthalmological Society
https://www.readbyqxmd.com/read/28209236/epithelial-downgrowth-report-of-2-cases-diagnosed-by-ocular-biopsy
#10
REVIEW
Hershel R Patel, Curtis E Margo
Epithelial downgrowth is an uncommon complication of ocular surgery or adverse consequence of accidental trauma, caused by surface squamous epithelium that has gained access to the inner compartments of the eye. Once embedded in the eye, squamous epithelium spreads over contiguous structures, interfering with normal aqueous outflow and vision. The pursuit of improved therapies is ongoing, but the greatest chance of preventing blindness is with early recognition. Two cases of epithelial downgrowth diagnosed from a corneal button and an iris biopsy are presented to familiarize pathologists with this disorder...
February 2017: Annals of Diagnostic Pathology
https://www.readbyqxmd.com/read/28208899/study-of-variation-in-intraocular-pressure-spike-iop-following-nd-yag-laser-capsulotomy
#11
Niharika K Shetty, Sriya Sridhar
INTRODUCTION: Posterior Capsular Opacifications (PCO) is a frequent complication of cataract surgery following posterior chamber intraocular lens implantation. Nd -Yag laser capsulotomy is the treatment of choice for PCO and is known to be associated with complications like Raised Intraocular Pressure (IOP), Intraocular lens pitting, intraocular lens cracks, cystoid macular oedema, retinal detachment, corneal burns. Raised IOP is the most common complication and prescribing anti-glaucoma drugs post capsulotomy is a common practise...
December 2016: Journal of Clinical and Diagnostic Research: JCDR
https://www.readbyqxmd.com/read/28208898/to-study-the-efficacy-of-difluprednate-ophthalmic-emulsion-and-prednisolone-acetate-ophthalmic-suspension-on-post-operative-inflammation-in-cataract-surgery
#12
Punita Garg, Nupur Tuteja, Shazia Qayum
INTRODUCTION: Senile cataract is the most common cause of visual impairment. Removal of cataract and implantation of intraocular lens implantation (IOL) is the main surgical approach for cataract. The major block in quick visual rehabilitation of the patient is post-operative inflammation. To limit post-operative inflammation corticosteroids drugs are used in routine prophylactically. Topical prednisolone acetate 1% and betamethasone 0.1% remain gold standard to control post-operative inflammation but newer drugs like difluprednate, loteprednol are also effective in controlling inflammation...
December 2016: Journal of Clinical and Diagnostic Research: JCDR
https://www.readbyqxmd.com/read/28203055/resident-surgeon-efficiency-in-femtosecond-laser-assisted-cataract-surgery
#13
Andrew C Pittner, Brian R Sullivan
PURPOSE: Comparison of resident surgeon performance efficiencies in femtosecond laser-assisted cataract surgery (FLACS) versus conventional phacoemulsification. PATIENTS AND METHODS: A retrospective cohort study was conducted on consecutive patients undergoing phacoemulsification cataract surgery performed by senior ophthalmology residents under the supervision of 1 attending physician during a 9-month period in a large Veterans Affairs medical center. Medical records were reviewed for demographic information, preoperative nucleus grade, femtosecond laser pretreatment, operative procedure times, total operating room times, and surgical complications...
2017: Clinical Ophthalmology
https://www.readbyqxmd.com/read/28197998/laser-assisted-subepithelial-keratectomy-lasek-versus-laser-assisted-in-situ-keratomileusis-lasik-for-correcting-myopia
#14
REVIEW
Jocelyn Kuryan, Anjum Cheema, Roy S Chuck
BACKGROUND: Near-sightedness, or myopia, is a condition in which light rays entering the eye along the visual axis focus in front of the retina, resulting in blurred vision. Myopia can be treated with spectacles, contact lenses, or refractive surgery. Options for refractive surgery include laser-assisted subepithelial keratectomy (LASEK) and laser-assisted in-situ keratomileusis (LASIK). Both procedures utilize a laser to shape the corneal tissue (front of the eye) to correct refractive error, and both create flaps before laser treatment of corneal stromal tissue...
February 15, 2017: Cochrane Database of Systematic Reviews
https://www.readbyqxmd.com/read/28192842/-keratoplasty-in-children-and-adolescents
#15
S J Lang, C Richter, O Richter, D Böhringer, G Geerling, T Reinhard
Background The conditions for long-term graft survival in infants and children are unfavorable, due to the different immunological features, the impaired clinical examination and the reduced compliance and treatment adherence. However, penetrating keratoplasty is often the only option to prevent amblyopia and there may be no alternative. We examined the different indications, graft survival and complications in two specialised centres. Material and Methods We identified all patients who were under the age of 18 years at the time of their penetrating keratoplasty...
February 13, 2017: Klinische Monatsblätter Für Augenheilkunde
https://www.readbyqxmd.com/read/28192588/conventional-versus-inverted-side-cut-flaps-for-femtosecond-laser-assisted-lasik-laboratory-and-clinical-evaluation
#16
Vishal Jhanji, Tommy C Y Chan, Wai Ying Li, Rayne R Lim, Marco C Y Yu, Kasin Law, Peng Yi, Yolanda W Y Yip, Yumeng Wang, Tsz Kin Ng, Shyam S Chaurasia, Rajiv R Mohan
PURPOSE: To study the differences in early corneal cellular events and biomechanical properties after femtosecond laser-assisted LASIK performed using conventional or inverted side-cut angles. METHODS: In the laboratory study, left eyes of 24 rabbits underwent LASIK flap creation with a 70° or 115° side-cut. The contralateral eyes served as controls. The corneas were harvested 24 hours postoperatively. In the clinical study, 2 eyes of each patient (n = 29) were randomized to corneal flap creation with 70° or 115° side-cut angles during LASIK...
February 1, 2017: Journal of Refractive Surgery
https://www.readbyqxmd.com/read/28192587/advanced-surface-ablation-with-a-new-software-for-the-reduction-of-ablation-irregularities
#17
Paolo Vinciguerra, Fabrizio I Camesasca, Riccardo Vinciguerra, Samuel Arba-Mosquera, Ingrid Torres, Emanuela Morenghi, J Bradley Randleman
PURPOSE: To compare visual outcomes and postoperative aberrations after surface ablation performed with a 750-Hz versus a 1,050-Hz excimer laser coupled with an ablation software designed to reduce corneal surface irregularity. METHODS: Retrospective comparative trial of myopic eyes that had refractive surgery consecutively treated with transepithelial advanced surface ablation with a 750-Hz excimer laser (750 group) versus a 1,050-Hz excimer laser coupled with the Smart Pulse Technology ablation software (SPT group)...
February 1, 2017: Journal of Refractive Surgery
https://www.readbyqxmd.com/read/28192586/three-year-stability-of-posterior-corneal-elevation-after-small-incision-lenticule-extraction-smile-for-moderate-and-high-myopia
#18
Yu Zhao, Weijun Jian, Yingjun Chen, Michael C Knorz, Xingtao Zhou
PURPOSE: To investigate long-term changes in posterior corneal elevation after small incision lenticule extraction (SMILE). METHODS: Thirty-six eyes of 20 patients (7 male, 13 female) who underwent SMILE were recruited for this prospective consecutive study. The mean preoperative manifest spherical equivalent was -6.24 ± 1.47 diopters (D) (range: -3.88 to -8.75 D). Posterior corneal surfaces were measured by a Scheimpflug camera (Pentacam; Oculus Optikgeräte GmbH, Wetzlar, Germany) preoperatively and at 1 month, 6 months, 12 months, 2 years, and 3 years after surgery...
February 1, 2017: Journal of Refractive Surgery
https://www.readbyqxmd.com/read/28188942/photorefractive-keratectomy-with-mitomycin-c-for-high-myopia-three-year-follow-up-results
#19
Hassan Hashemi, Yahya Salimi, Poopak Pir, Soheila Asgari
Photorefractive keratectomy (PRK) is a safe and effective surgical keratorefractive technique which is done with the application of mitomycin-C (MMC) in cases of high myopia to prevent the formation of corneal haze This study was conducted to evaluate 3-year visual acuity and quality outcomes of PRK-MMC in high myopia. This before-after study was conducted on 20 individuals (40 eyes) with myopia more than 6.0 diopter (D). Visual acuity and quality indices were evaluated before and three years after the procedure and their stability was examined between the 1st and 3rd years...
January 2017: Acta Medica Iranica
https://www.readbyqxmd.com/read/28188490/a-review-of-laser-assisted-versus-traditional-phacoemulsification-cataract-surgery
#20
REVIEW
H Burkhard Dick, Tim Schultz
The use of femtosecond laser surgery improves the precision and reproducibility of corneal incisions and the capsular opening; it also reduces the amount of ultrasound energy required for lens nucleus work-up. The rate of complications reported so far appears to be low. There are a number of contraindications such as a history of cornea and/or glaucoma surgery and certain anatomical features like deep-set eyes, kyphosis, tremor, and obesity. Visual recovery and refractive results of both techniques are excellent...
February 10, 2017: Ophthalmology and Therapy
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