Abstract:
PURPOSE:To determine whether the keratometric and refractive surgical effects of paired intrastromal corneal ring segments (ICRS) depend on their alignment relative to steep and flat topographic meridians. SETTING:St. Paul's Eye Unit, Royal Liverpool University Hospital, Liverpool, United Kingdom. DESIGN:Comparative case series. METHODS:Keratoconic patients who had two 0.3 mm Intacs ICRS inserted were retrospectively grouped depending on alignment of segments within 30 degrees either side of the steep (meridional group) or the flat (perpendicular group) topographic meridians, respectively, with the rest in the oblique group. Principal outcome measures were changes in visual acuity, refractive surgical effect, and keratometric surgical effect 4 months postoperatively. RESULTS:Forty eyes of 40 patients were included. There was a significant reduction in keratometric power (flattening) (P<.01) but not in refractive error in all 3 groups. The reduction in keratometric astigmatism was significantly greater in the perpendicular group (-2.67 diopters [D]) than in the meridional group (-0.65 D) (P=.03), with the oblique group (-0.9 D) in between (P=.12). The principal reduction was flattening orthogonal to the incision site, with relative steepening in the axis of ICRS alignment. In all groups, variations in the refractive surgical effect and keratometric surgical effect were very high. CONCLUSIONS:Placement of two 0.3 mm ICRS had a variable effect with limited predictability. There was predominant flattening of the cornea orthogonal to the axis of ICRS alignment. Irrespective of the location of preoperative steep and flat keratometric meridians, the maximum reduction in astigmatism occurred when the incision and the segments were placed along the flat topographic meridian. FINANCIAL DISCLOSURE:No author has a financial or proprietary interest in any material or method mentioned.
journal_name
J Cataract Refract Surgjournal_title
Journal of cataract and refractive surgeryauthors
Tu KL,Batterbury M,Kaye SBdoi
10.1016/j.jcrs.2012.04.024subject
Has Abstractpub_date
2012-08-01 00:00:00pages
1432-9issue
8eissn
0886-3350issn
1873-4502pii
S0886-3350(12)00650-5journal_volume
38pub_type
杂志文章abstract:PURPOSE:To compare the spatial resolution threshold in the central visual field of pseudophakic patients with monofocal and multifocal intraocular lenses (IOLs). SETTING:Eye Clinic, University of Trieste, Italy. METHODS:Twenty phakic normal subjects and four groups of 20 pseudophakic patients each, implanted with ref...
journal_title:Journal of cataract and refractive surgery
pub_type: 杂志文章
doi:10.1016/s0886-3350(98)80206-x
更新日期:1998-02-01 00:00:00
abstract:PURPOSE:To evaluate the changes occurring in the cornea, anterior segment anatomy, and intraocular pressure (IOP) in pregnant women. SETTING:Department of Ophthalmology, Assaf Harofeh Medical Center, Zerifin, Israel. DESIGN:Prospective single-center comparative study. METHODS:The Ocular Response Analyzer dynamic bid...
journal_title:Journal of cataract and refractive surgery
pub_type: 杂志文章
doi:10.1016/j.jcrs.2014.02.042
更新日期:2014-11-01 00:00:00
abstract::The management of malignant glaucoma involves either anterior vitrectomy with zonulectomy and iridectomy or 3-port core pars plana vitrectomy (PPV) by retinal surgeons. The proposed modification can be performed with reasonable success rates. In this technique, synechiolysis and anterior chamber irrigation is performe...
journal_title:Journal of cataract and refractive surgery
pub_type: 杂志文章
doi:10.1097/j.jcrs.0000000000000519
更新日期:2020-11-23 00:00:00
abstract:PURPOSE:To compare the effect of four commercially available viscoelastic agents on postoperative intraocular pressure (IOP). SETTING:Four outpatient sites. METHODS:Sixty-nine patients having routine extracapsular cataract extraction were enrolled in the study; 54 were available for a 3 month follow-up examination. T...
journal_title:Journal of cataract and refractive surgery
pub_type: 临床试验,杂志文章,多中心研究,随机对照试验
doi:10.1016/s0886-3350(96)80199-4
更新日期:1996-09-01 00:00:00
abstract:PURPOSE:To compare 2 ultrasound (US) frequencies for phacoemulsification for moderate to hard cataract to determine a frequency that makes phacoemulsification safer and more efficacious. SETTING:Post Graduate Institute of Medical Education and Research, New Delhi, India. DESIGN:Randomized controlled trial. METHODS:P...
journal_title:Journal of cataract and refractive surgery
pub_type: 杂志文章,随机对照试验
doi:10.1016/j.jcrs.2019.04.015
更新日期:2019-09-01 00:00:00
abstract:PURPOSE:To evaluate the intraoperative difficulties and long-term outcome of phacoemulsification through a small pupil using minimal iris manipulation. SETTINGS:Iladevi Cataract & IOL Research Centre, Ahmedabad, India. METHODS:This prospective study included 30 consecutive eyes with a maximally dilated pupil size of ...
journal_title:Journal of cataract and refractive surgery
pub_type: 杂志文章
doi:10.1016/s0886-3350(00)00361-8
更新日期:2000-08-01 00:00:00
abstract:PURPOSE:To evaluate negative dysphotopsia in the far periphery of the pseudophakic eye by generating simulated images of text charts. SETTING:Consultancy. DESIGN:Laboratory study. METHODS:Simulated images of a peripheral text chart were created using a ray-trace model of a pseudophakic eye. The point spread function...
journal_title:Journal of cataract and refractive surgery
pub_type: 杂志文章
doi:10.1097/j.jcrs.0000000000000103
更新日期:2020-03-01 00:00:00
abstract::Positive pressure during cataract surgery can adversely affect the clinical outcome if the surgeon is unprepared. A variety of surgical maneuvers are described, including dry insertion of the phacoemulsification needle, capsule protection with the second instrument, dry cortical aspiration in an ophthalmic viscosurgic...
journal_title:Journal of cataract and refractive surgery
pub_type: 杂志文章
doi:10.1016/j.jcrs.2006.06.011
更新日期:2006-09-01 00:00:00
abstract:PURPOSE:To determine the predictability and consistency of corneal flap thickness, flap diameter, and hinge length with the modern 100 microm head of the Moria LSK-One manual microkeratome. SETTING:Private clinic, office-based practice. METHODS:Forty-two consecutive eyes with no previous surgery having thin flap lase...
journal_title:Journal of cataract and refractive surgery
pub_type: 杂志文章
doi:10.1016/j.jcrs.2004.10.056
更新日期:2005-06-01 00:00:00
abstract:PURPOSE:To compare the extension of peripheral visual fields in phakic and pseudophakic patients and to evaluate whether Goldmann kinetic perimetry can be used as an objective measure of negative dysphotopsia. SETTING:University Eye Clinic, Maastricht University Medical Centre, Maastricht, the Netherlands. DESIGN:Pro...
journal_title:Journal of cataract and refractive surgery
pub_type: 杂志文章
doi:10.1016/j.jcrs.2016.09.016
更新日期:2016-11-01 00:00:00
abstract:PURPOSE:To describe surface scattering, a new phenomenon in polyacrylic intraocular lenses (IOLs), and discuss the possible cause of this finding. SETTING:Showa University, Fujigaoka Hospital, Yokohama, Kanagawa, Japan. METHODS:This observational case series involved 40 patients who received the AcrySof(R) IOL (Alcon...
journal_title:Journal of cataract and refractive surgery
pub_type: 杂志文章
doi:10.1016/s0886-3350(02)01994-6
更新日期:2003-07-01 00:00:00
abstract:PURPOSE:To use the double-pass technique to evaluate the in vitro optical quality of foldable monofocal intraocular lenses (IOLs) used to correct aphakia. SETTING:Universitat Politècnica de Catalunya, Terrassa, and Instituto de Microcirugía Ocular de Barcelona, Barcelona, Spain; Universidad Nacional de Tucumán, Tucumá...
journal_title:Journal of cataract and refractive surgery
pub_type: 杂志文章
doi:10.1016/j.jcrs.2009.03.022
更新日期:2009-08-01 00:00:00
abstract:PURPOSE:To compare the change in ocular higher-order wavefront aberrations (HOAs), visual acuity, and modulation transfer function (MTF) after lens extraction with intraocular lens (IOL) implantation in patients with subluxated lenses. SETTING:Iladevi Cataract & IOL Research Centre, Ahmedabad, India. DESIGN:Prospecti...
journal_title:Journal of cataract and refractive surgery
pub_type: 杂志文章
doi:10.1016/j.jcrs.2017.12.017
更新日期:2018-03-01 00:00:00
abstract:PURPOSE:To compare the efficacy and safety of anterior capsulotomy creation with a new selective laser device (CAPSULaser) with those of manual capsulotomies. SETTING:GEMINI Eye Clinic, Zlin, Czech Republic. DESIGN:Prospective case series. METHODS:Patients were placed in cohorts based on age and cataract grade and r...
journal_title:Journal of cataract and refractive surgery
pub_type: 杂志文章
doi:10.1016/j.jcrs.2018.12.012
更新日期:2019-05-01 00:00:00
abstract:PURPOSE:To evaluate the long-term response of 6 types of 3-piece intraocular lenses (IOLs) by assessing the cellular reaction on the anterior IOL surface, the behavior of posterior and anterior capsule fibrosis, and flare. SETTING:Department of Ophthalmology, Medical School, University of Vienna, Vienna, Austria. MET...
journal_title:Journal of cataract and refractive surgery
pub_type: 临床试验,杂志文章,随机对照试验
doi:10.1016/s0886-3350(01)01122-1
更新日期:2002-01-01 00:00:00
abstract::Posterior-assisted levitation is used to retrieve and levitate a sinking nucleus in cataract surgery associated with posterior capsule rupture. After the nucleus is levitated in the anterior chamber, the intraocular lens (IOL) scaffold procedure helps emulsify the nuclear remnants with the phacoemulsification probe an...
journal_title:Journal of cataract and refractive surgery
pub_type: 杂志文章
doi:10.1016/j.jcrs.2017.06.004
更新日期:2017-07-01 00:00:00
abstract::We report the case of a 12-year-old boy with severe keratoconus who had uneventful deep anterior lamellar keratoplasty (DALK) using the big-bubble technique in the left eye for severe loss of best spectacle-corrected visual acuity and contact lens intolerance. Two weeks after surgery, the patient experienced accidenta...
journal_title:Journal of cataract and refractive surgery
pub_type: 杂志文章
doi:10.1016/j.jcrs.2009.01.037
更新日期:2009-06-01 00:00:00
abstract:PURPOSE:To analyze risk factors and management of pupillary intraocular lens (IOL) capture after IOL transscleral fixation. SETTING:Department of Ophthalmology, Seoul National University Hospital, Seoul, South Korea. DESIGN:Retrospective case series. METHODS:A chart review was performed of patients who had transscle...
journal_title:Journal of cataract and refractive surgery
pub_type: 杂志文章
doi:10.1016/j.jcrs.2017.08.021
更新日期:2017-12-01 00:00:00
abstract:PURPOSE:To evaluate irregularity of the anterior and posterior cornea before and after Descemet-stripping endothelial keratoplasty (DSEK) and its effect on visual acuity. SETTING:Department of Ophthalmology, Keio University School of Medicine, Tokyo, Japan. METHODS:Corneal data were acquired using a rotating Scheimpf...
journal_title:Journal of cataract and refractive surgery
pub_type: 杂志文章
doi:10.1016/j.jcrs.2008.11.062
更新日期:2009-04-01 00:00:00
abstract:PURPOSE:To measure the incidence of acute postoperative cystoid macular edema (CME) in clinical practice. SETTING:Private clinical practice, Eugene, Oregon, USA. DESIGN:Retrospective chart review. METHODS:The electronic medical records database was searched for the charts of all patients having cataract surgery duri...
journal_title:Journal of cataract and refractive surgery
pub_type: 杂志文章
doi:10.1016/j.jcrs.2012.07.029
更新日期:2012-12-01 00:00:00
abstract:PURPOSE:To evaluate the outcome of posterior capsule opacification (PCO) after implantation in rabbit eyes of currently available 3-piece and 1-piece hydrophobic acrylic intraocular lenses (IOLs) with square optic edges. SETTING:John A. Moran Eye Center, University of Utah, Salt Lake City, Utah, USA. METHODS:The 3-pi...
journal_title:Journal of cataract and refractive surgery
pub_type: 杂志文章
doi:10.1016/j.jcrs.2004.06.088
更新日期:2005-04-01 00:00:00
abstract:PURPOSE:To assess the visual outcomes of pseudophakic cystoid macular edema (CME) as compared with age- and copathology-matched control subjects, the costs of treatment and follow-up, and the patient-reported outcomes using the new Cat-patient-reported outcome measures (PROM) 5 questionnaire. SETTING:West Suffolk Hosp...
journal_title:Journal of cataract and refractive surgery
pub_type: 杂志文章
doi:10.1097/j.jcrs.0000000000000192
更新日期:2020-06-01 00:00:00
abstract:PURPOSE:Comparison of lens capsule-related complications resulting from femtosecond laser-assisted capsulotomy and manual capsulorhexis in patients with white cataracts. SETTING:Eye Center, Second Affiliated Hospital, Zhejiang Medical School, Hangzhou, China. DESIGN:Prospective consecutive nonrandomized comparative c...
journal_title:Journal of cataract and refractive surgery
pub_type: 杂志文章
doi:10.1016/j.jcrs.2018.10.037
更新日期:2019-03-01 00:00:00
abstract:PURPOSE:To estimate ophthalmologist-level variation in cataract surgery billing and evaluate patient and ophthalmologist characteristics associated with complex cataract surgery coding. SETTING:Cross-sectional study. DESIGN:Retrospective case series. METHODS:Medicare beneficiaries aged 65 years or older who had cata...
journal_title:Journal of cataract and refractive surgery
pub_type: 杂志文章
doi:10.1016/j.jcrs.2019.06.008
更新日期:2019-11-01 00:00:00
abstract::We describe 2 women with high myopia of -12.0 and -18.0 diopters who presented with myopic macular hemorrhages 1 and 4 days, respectively, after being treated by laser in situ keratomileusis (LASIK). One hemorrhage was related to a pre-existing choroidal neovascularization and the other to the presence of lacquer crac...
journal_title:Journal of cataract and refractive surgery
pub_type: 杂志文章
doi:10.1016/s0886-3350(00)00313-8
更新日期:2000-06-01 00:00:00
abstract::About 35% of intraocular lenses now implanted in the United States are narrow profile lenses, measuring on the average 5.0 mm by 6.0 mm. This study sought to determine whether these lenses cause unwanted optical images with a decrease in the quality of vision. Seventy-five eyes with a 5.0 mm x 6.0 mm intraocular lens ...
journal_title:Journal of cataract and refractive surgery
pub_type: 杂志文章
doi:10.1016/s0886-3350(13)80003-x
更新日期:1993-09-01 00:00:00
abstract:PURPOSE:To evaluate the long-term effects of excimer laser treatment for ametropia after surgical treatment of rhegmatogenous retinal detachment (RRD) with scleral buckles. SETTING:Helsinki University Eye Hospital, Helsinki, Finland. METHODS:Ten patients (10 eyes) who had 1 or more surgeries for RRD followed by refra...
journal_title:Journal of cataract and refractive surgery
pub_type: 杂志文章
doi:10.1016/j.jcrs.2007.06.023
更新日期:2007-10-01 00:00:00
abstract:PURPOSE:To determine improvement of near visual acuity by bilateral multifocal aspheric LASIK treatments in presbyopic patients. SETTING:Goethe-University, Frankfurt, Germany. DESIGN:Prospective, non-randomized trial. METHODS:Thirty presbyopic patients underwent laser in situ keratomileusis (LASIK) treatment with a ...
journal_title:Journal of cataract and refractive surgery
pub_type: 杂志文章
doi:10.1097/j.jcrs.0000000000000198
更新日期:2020-03-30 00:00:00
abstract:PURPOSE:To compare the values for corneal power determined by the axial, instantaneous and refractive formulas when imaging normal human corneas using computerized videokeratography. SETTING:Cullen Eye Institute, Baylor College of Medicine, Houston, Texas, USA. METHODS:This prospective clinical trial involved 60 corn...
journal_title:Journal of cataract and refractive surgery
pub_type: 临床试验,杂志文章
doi:10.1016/s0886-3350(98)80009-6
更新日期:1998-09-01 00:00:00
abstract::We examined the use of a geometric model to explain the effects of radial keratotomy (RK) on corneal topography based on wound gape of radial incisions. Histopathologic studies of healed human RK incisions revealed incision gape in Bowman's membrane and anterior stroma, with intervening epithelial ingrowth or fibrous ...
journal_title:Journal of cataract and refractive surgery
pub_type: 杂志文章
doi:10.1016/s0886-3350(13)80850-4
更新日期:1991-07-01 00:00:00