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cataract and refractive surgery

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https://www.readbyqxmd.com/read/29331293/toric-lens-implantation-in-cataract-surgery-automated-versus-manual-horizontal-axis-marking-analysis-of-50%C3%A2-cases
#1
M Raucau, H El Chehab, E Agard, C Lagenaite, C Dot
SUBJECT: The main objective of our study was to evaluate the contribution of automated conjunctival registration in the alignment of toric intraocular lenses by comparing automated registration optimized with Callisto® to manual marking of the horizontal axis. MATERIALS AND METHODS: We performed a prospective, descriptive, monocentric study on patients undergoing cataract surgery with a toric intraocular lens (Asphina 709 Zeiss), performed by a surgeon with good experience in toric implants, between September 2016 and March 2017...
January 10, 2018: Journal Français D'ophtalmologie
https://www.readbyqxmd.com/read/29315441/ray-tracing-analysis-of-the-corneal-power-from-scheimpflug-data
#2
Thomas Olsen, Peter Jeppesen
PURPOSE: To describe a method by which mapped corneal elevation data can be used for ray-tracing analysis of the effective corneal power. METHODS: Mapped elevation data of the front and back surface of the cornea exported by a clinical Scheimpflug camera was triangulated into a polygonal format and imported into a commercial optical engineering software. The focal length of the cornea was determined by exact ray tracing analysis of the distance giving the sharpest point spread function (PSF) at the selected image plane...
January 1, 2018: Journal of Refractive Surgery
https://www.readbyqxmd.com/read/29315437/evaluation-of-femtosecond-laser-versus-manual-clear-corneal-incisions-in-cataract-surgery-using-spectral-domain-optical-coherence-tomography
#3
Xiaogang Wang, Zhe Zhang, Xiaoyan Li, Lisha Xie, Haining Zhang, Douglas D Koch, Li Wang, Suhua Zhang
PURPOSE: To investigate the wound healing changes of clear corneal incisions performed with a femtosecond laser or a steel bevel knife in cataract surgery using spectral-domain optical coherence tomography. METHODS: Prospectively, consecutive patients undergoing either femtosecond laser-assisted cataract surgery (femtosecond laser group) using the LenSx laser (Alcon Laboratories, Inc., Fort Worth, TX) or traditional cataract surgery using steel blades (control group) were enrolled...
January 1, 2018: Journal of Refractive Surgery
https://www.readbyqxmd.com/read/29305312/population-based-incidence-of-intraocular-lens-exchange-in-olmsted-county-minnesota
#4
Erick D Bothun, Lilian C B Cavalcante, David O Hodge, Sanjay V Patel
PURPOSE: To determine the population-based incidence of pseudophakic intraocular lens exchange in Olmsted County, Minnesota. DESIGN: Retrospective review of a population-based cohort. METHODS: Patients undergoing pseudophakic intraocular lens exchange in Olmsted County, MN between January 1, 1986 and December 31, 2016, were identified from the Rochester Epidemiology Project medical record linkage system. Indications and outcomes were determined, and the incidence rate was calculated as cases per 1,000,000 person-years...
January 2, 2018: American Journal of Ophthalmology
https://www.readbyqxmd.com/read/29301766/population-based-assessment-of-visual-acuity-outcomes-following-cataract-surgery-in-australia-the-national-eye-health-survey
#5
Stuart Keel, Jing Xie, Joshua Foreman, Hugh R Taylor, Mohamed Dirani
AIM: To assess the visual outcomes of cataract surgery among a national sample of non-Indigenous and Indigenous Australians. METHODS: This was a population-based study of 3098 non-Indigenous Australians (50-98 years) and 1738 Indigenous Australians (40-92 years), stratified by remoteness. A poor postoperative outcome in an eye that had undergone cataract surgery was defined as presenting distance visual acuity (PVA) <6/12-6/60, and a very poor outcome was defined as PVA <6/60...
January 4, 2018: British Journal of Ophthalmology
https://www.readbyqxmd.com/read/29282016/influence-of-corneal-power-on-intraocular-lens-power-of-the-second-eye-in-the-srk-t-formula-in-bilateral-cataract-surgery
#6
Young Choi, Youngsub Eom, Jong Suk Song, Hyo Myung Kim
BACKGROUND: To evaluate the effect of different adjustments of the refractive outcome of the first eye according to corneal power (K) in order to improve the intraocular lens (IOL) power calculation of the second eye in the SRK/T formula. METHODS: One hundred thirty-four patients who underwent uncomplicated bilateral, sequential phacoemulsification with AcrySof IQ implantation were enrolled. The optimal partial adjustment of the refractive outcome of the first eye according to K was retrospectively analyzed using a regression formula...
December 28, 2017: BMC Ophthalmology
https://www.readbyqxmd.com/read/29281342/a-population-based-survey-of-visual-impairment-and-its-correlates-in-mahabubnagar-district-telangana-state-india
#7
Islay Mactaggart, Sarah Polack, Gvs Murthy, Hannah Kuper
PURPOSE: To estimate the prevalence and correlates of visual impairment in Mahabubnagar district, Telangana, India. METHODS: Fifty-one clusters of 80 people (all ages) were sampled with probability proportionate to size. Households within clusters were selected through the compact segment sampling. Visual acuity (VA) was measured with a tumbling "E" chart. An Ophthalmic Assistant or Vision Technician examined people with VA<6/12 in either eye. Other impairments (hearing, physical) were clinically assessed and self-reported functional difficulties measured using the Washington Group Extended Set...
December 27, 2017: Ophthalmic Epidemiology
https://www.readbyqxmd.com/read/29235256/automated-refraction-is-stable-1%C3%A2-week-after-uncomplicated-cataract-surgery
#8
Christoffer Ostri, Stig K Holfort, Marianne S Fich, Per Riise
PURPOSE: To compare automated refraction 1 week and 1 month after uncomplicated cataract surgery. METHODS: In this prospective cohort study, we recruited patients in a 2-month period and included consecutive patients scheduled for bilateral small-incision phacoemulsification cataract surgery. The exclusion criteria were (i) corneal and/or retinal pathology that could lead to automated refraction miscalculation and (ii) surgery complications. Automated refraction was measured 1 week and 1 month after surgery...
December 13, 2017: Acta Ophthalmologica
https://www.readbyqxmd.com/read/29227506/comparison-of-methodologies-using-estimated-or-measured-values-of-total-corneal-astigmatism-for-toric-intraocular-lens-power-calculation
#9
Tiago B Ferreira, Paulo Ribeiro, Filomena J Ribeiro, João G O'Neill
PURPOSE: To compare the prediction error in the calculation of toric intraocular lenses (IOLs) associated with methods that estimate the power of the posterior corneal surface (ie, Barrett toric calculator and Abulafia-Koch formula) with that of methods that consider real measures obtained using Scheimpflug imaging: a software that uses vectorial calculation (Panacea toric calculator: http://www.panaceaiolandtoriccalculator.com) and a ray tracing software (PhacoOptics, Aarhus Nord, Denmark)...
December 1, 2017: Journal of Refractive Surgery
https://www.readbyqxmd.com/read/29223239/phacoemulsification-with-intraocular-lens-implantation-after-previous-descemetorhexis-without-endothelial-keratoplasty
#10
Aaron R Kaufman, Ricardo M Nosé, Yifan Lu, Roberto Pineda
A 58-year-old woman with bilateral Fuchs endothelial corneal dystrophy presented with predominantly central guttata in the left eye causing visually significant stromal edema. A 4.0 mm descemetorhexis without endothelial keratoplasty was performed. At the 6-week follow-up, the central cornea had cleared completely and the central endothelial cell density (ECD) was 541 cells/mm2. The central corneal clearing remained stable for 2 years after the procedure; however, vision declined because of a visually significant cataract in the left eye...
November 2017: Journal of Cataract and Refractive Surgery
https://www.readbyqxmd.com/read/29215393/therapeutic-effects-of-lamellar-keratoplasty-on-terrien-marginal-degeneration
#11
Lin Li, Hualei Zhai, Lixin Xie, Jun Cheng, Weiwei Liu
PURPOSE: To evaluate the therapeutic effects of lamellar keratoplasty (LK) on Terrien marginal degeneration (TMD). METHODS: Retrospective interventional case series. Medical records of 63 patients (71 eyes) who received LK for TMD at Qingdao Eye Hospital, Shandong Eye Institute from December 1995 to March 2014 were reviewed. A total of 56 eyes were treated with partial LK and 15 eyes with total LK. Complications, visual acuity recovery, and graft status were evaluated...
December 5, 2017: Cornea
https://www.readbyqxmd.com/read/29208811/reviewing-the-visual-benefits-of-femtosecond-laser-assisted-cataract-surgery-can-we-improve-our-outcomes
#12
REVIEW
Michael Lawless, Lewis Levitz, Chris Hodge
Femtosecond laser-assisted cataract surgery (FLACS) was introduced in 2009 and has increasingly been incorporated into surgical practice. The automation of three key aspects of cataract surgery was expected to deliver a significant improvement in both refractive and safety outcomes. The published literature has not yet shown consistent refractive improvement above conventional techniques. The purpose of this paper is to review current FLACS refractive outcomes and explore factors that may have contributed to the current findings and whether future improvements are possible...
December 2017: Indian Journal of Ophthalmology
https://www.readbyqxmd.com/read/29208809/optimizing-outcomes-with-multifocal-intraocular-lenses
#13
REVIEW
Gitansha Shreyas Sachdev, Mahipal Sachdev
Modern day cataract surgery is evolving from a visual restorative to a refractive procedure. The advent of multifocal intraocular lenses (MFIOLs) allows greater spectacle independence and increased quality of life postoperatively. Since the inception in 1980s, MFIOLs have undergone various technical advancements including trifocal and extended depth of vision implants more recently. A thorough preoperative workup including the patients' visual needs and inherent ocular anatomy allows us to achieve superior outcomes...
December 2017: Indian Journal of Ophthalmology
https://www.readbyqxmd.com/read/29208808/intraocular-lens-calculations-in-atypical-eyes
#14
REVIEW
Aazim A Siddiqui, Uday Devgan
Cataract surgery is the most performed surgical procedure in the field of ophthalmology. The process of intraocular lens (IOL) calculations is a critical step to achieving successful outcomes. Many IOL formulae exist to guide surgeons through the difficult process of picking the most appropriate lens to achieve a certain target refraction. However, these formulae reach within 0.50 diopters of the target refraction only 75% of the time, leaving 25% of the eyes with a significant refractive surprise. A literature review was performed to investigate all the relevant published material on the history, progress, and recent advancements of IOL calculations...
December 2017: Indian Journal of Ophthalmology
https://www.readbyqxmd.com/read/29181318/validity-of-automated-refraction-after-segmented-refractive-multifocal-intraocular-lens-implantation
#15
César Albarrán-Diego, Gonzalo Muñoz, Stephanie Rohrweck, Santiago García-Lázaro, José Ricardo Albero
AIM: To evaluate the clinical utility of automated refraction (AR) and keratometry (KR) compared with subjective or manifest refraction (MR) after cataract or refractive lens exchange surgery with implantation of Lentis Mplus X (Oculentis GmbH) refractive multifocal intraocular lens (IOL). METHODS: Eighty-six eyes implanted with the Lentis Mplus X multifocal IOL were included. MR was performed in all patients followed by three consecutive AR measurements using the Topcon KR-8000 autorefractor...
2017: International Journal of Ophthalmology
https://www.readbyqxmd.com/read/29177182/glaucoma-surgery-and-induced-astigmatism-a-systematic-review
#16
REVIEW
Helen H L Chan, Yu Xiang G Kong
Background: The refractive outcomes of glaucoma surgeries, particularly their effect on astigmatism, are incompletely understood. Main body: Trabeculectomy is associated with a considerable amount of with-the-rule astigmatic change in the immediate postoperative period. This is followed by a gradual against-the-rule shift. These changes are altered with the use of mitomycin C (MMC). Non-penetrating surgery such as deep sclerectomy is also associated with a similar or smaller degree of induced astigmatism...
2017: Eye and Vision (London, England)
https://www.readbyqxmd.com/read/29165934/first-rapid-assessment-of-avoidable-blindness-survey-in-the-maldives-prevalence-and-causes-of-blindness-and-cataract-surgery
#17
Ubeydulla Thoufeeq, Taraprasad Das, Hans Limburg, Maharshi Maitra, Lapam Panda, Asim Sil, John Trevelyan, Yuddha Sapkota
PURPOSE: A nationwide rapid assessment of avoidable blindness survey was undertaken in the Maldives among people aged 50 years or more to assess the prevalence and causes of blindness and visual impairment, cataract surgical coverage, cataract surgery outcome, and barriers to uptake of cataract surgical services. DESIGN: Prospective population-based study. METHODS: In the cluster sampling probability proportionate to size method, 3100 participants in 62 clusters across all 20 atolls were enrolled through house-to-house visits...
November 22, 2017: Asia-Pacific Journal of Ophthalmology
https://www.readbyqxmd.com/read/29156465/-pseudophacic-additive-lenses
#18
Fritz H Hengerer, Ina Conrad-Hengerer
Implantation of artificial intraocular lenses (IOL) after cataract removal today represents the standard of care in the field of anterior segment surgery. In refractive lens exchange cases the natural lens is replaced by an IOL to correct different types of refractive situations. In the majority of the operations the refractive result is satisfying with only few deviations from target refraction.But daily practice reveals some outliers from the intended corrections with the need for further refractive enhancements, respectively...
November 20, 2017: Klinische Monatsblätter Für Augenheilkunde
https://www.readbyqxmd.com/read/29142886/toric-intraocular-lens-for-astigmatism-correction-in-cataract-patients
#19
Hassan Razmjoo, Mohammad Ghoreishi, Azadeh Mohammadi Milasi, Alireza Peyman, Zahra Jafarzadeh, Mohadeseh Mohammadinia, Nasrollahi Kobra
Background: To assess the clinical consequences of AcrySof toric intraocular lens (IOL) and Hoya toric IOL implantation to correct preexisting corneal astigmatism in patients undergoing cataract surgery. Materials and Methods: In this study, we examined 55 eyes of 45 patients with at least 1.00 D corneal astigmatism who were scheduled for cataract surgery. After phacoemulsification, toric IOL was inserted and axis was aligned. We observed the patients, uncorrected distance visual acuity (UDVA), corrected distance visual acuity (CDVA), keratometry, manifest refraction, and IOL axis alignment 6 months after surgery...
2017: Advanced Biomedical Research
https://www.readbyqxmd.com/read/29131702/postoperative-refractive-errors-following-pediatric-cataract-extraction-with-intraocular-lens-implantation
#20
Maanasa Indaram, Deborah K VanderVeen
PURPOSE: Advances in surgical techniques allow implantation of intraocular lenses (IOL) with cataract extraction, even in young children. However, there are several challenges unique to the pediatric population that result in greater degrees of postoperative refractive error compared to adults. METHODS: Literature review of the techniques and outcomes of pediatric cataract surgery with IOL implantation. RESULTS: Pediatric cataract surgery is associated with several sources of postoperative refractive error...
November 13, 2017: Seminars in Ophthalmology
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