Abstract:
PURPOSE:To evaluate the influence of posterior corneal astigmatism on total corneal astigmatism in patients with 1.00 diopter (D) or more of corneal astigmatism. SETTING:Private practice, Bologna, Italy. DESIGN:Prospective case series. METHODS:Corneal astigmatism was measured using a Scheimpflug camera combined with a corneal topographer (Sirius). Keratometric astigmatism, anterior corneal astigmatism, posterior corneal astigmatism, and total corneal astigmatism were evaluated. Vector analysis was performed according to the Næser method. RESULTS:One hundred fifty-seven eyes were enrolled. Keratometric astigmatism was with the rule (WTR), against the rule (ATR), and oblique in 84.0%, 11.5%, and 4.5% of eyes, respectively. Posterior corneal astigmatism exceeded 0.50 D and 1.00 D in 55.4% of eyes and 5.7% of eyes, respectively. The mean posterior corneal astigmatism was 0.54 D, inclined 91 degrees in relation to the steeper anterior corneal meridian. The steepest meridian was vertically aligned in 93.0% of cases. Compared with total corneal astigmatism, keratometric astigmatism overestimated WTR astigmatism by a mean of 0.22 D ± 0.32 (SD), underestimated ATR astigmatism by 0.21 ± 0.26 D, and overestimated oblique astigmatism by 0.13 ± 0.37 D. In the whole sample, a difference in astigmatism magnitude of 0.50 D or more was detected between keratometric astigmatism and total corneal astigmatism in 16.6% of cases and the difference in the location of the steep meridian was greater than 10 degrees in 3.8% of cases. CONCLUSION:In patients who are candidates for surgical correction of astigmatism, measuring only the anterior corneal curvature can lead to inaccurate evaluation of the total corneal astigmatism. FINANCIAL DISCLOSURE:Mr. Versaci and Mr. Vestri are employees of Costruzione Strumenti Oftalmici Srl. 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
Savini G,Versaci F,Vestri G,Ducoli P,Næser Kdoi
10.1016/j.jcrs.2014.01.046subject
Has Abstractpub_date
2014-10-01 00:00:00pages
1645-53issue
10eissn
0886-3350issn
1873-4502pii
S0886-3350(14)01003-7journal_volume
40pub_type
杂志文章abstract::A 48-year-old man had simultaneous bilateral photorefractive keratectomy (PRK). The surgeon who performed the PRK did not see the patient in follow-up, and there was confusion regarding the comanaging doctor. Therefore, the patient was not examined immediately postoperatively. Several days later, he was hospitalized f...
journal_title:Journal of cataract and refractive surgery
pub_type: 杂志文章
doi:10.1016/s0886-3350(99)00336-3
更新日期:2000-01-01 00:00:00
abstract:PURPOSE:To evaluate and compare the efficacy of topical versus retrobulbar anesthesia for cataract surgery performed by a surgeon newly converting to the topical technique. SETTING:Department of Ophthalmology, Moran Eye Center, University of Utah, Salt Lake City, Utah, USA. METHODS:Ninety patients were prospectively ...
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(98)80143-0
更新日期:1998-06-01 00:00:00
abstract::A technique for phacoemulsification that can be used with or without capsulorhexis and that allows surgery to be performed at the 12 o'clock position is described. Following central sculpting, the nucleus is tipped superiorly to the level of the iris plane with a second instrument and the phacoemulsification tip. The ...
journal_title:Journal of cataract and refractive surgery
pub_type: 杂志文章
doi:10.1016/s0886-3350(13)81054-1
更新日期:1991-09-01 00:00:00
abstract::I describe a technique to manage a subluxated crystalline lens or an in-the-bag posterior chamber intraocular lens (PC IOL) that tilts severely into the anterior or midvitreous cavity. In the absence of intervening vitreous presentation, a 27-gauge needle is inserted via a snugly fitting paracentesis incision to reach...
journal_title:Journal of cataract and refractive surgery
pub_type: 杂志文章
doi:10.1016/j.jcrs.2009.01.030
更新日期:2009-06-01 00:00:00
abstract:PURPOSE:To evaluate an outbreak of infectious keratitis after laser in situ keratomileusis (LASIK) at a single laser center in Japan. SETTING:Tokyo Dental College, Chiba, Japan. DESIGN:Case series. METHODS:Relevant demographic and clinical data were obtained from case records using a standardized multicenter questio...
journal_title:Journal of cataract and refractive surgery
pub_type: 杂志文章,多中心研究
doi:10.1016/j.jcrs.2010.11.034
更新日期:2011-05-01 00:00:00
abstract:PURPOSE:To compare the results of 2 intraocular lens (IOL) implantation techniques in pediatric cataract surgery. SETTING:Labbafinejad Medical Center, Tehran, Iran. METHODS:This contralateral prospective randomized study comprised children with bilateral congenital or developmental cataract. In all cases, anterior ca...
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.2009.02.017
更新日期:2009-06-01 00:00:00
abstract:UNLABELLED:We describe a recently developed chopper, the retrochopper, and a technique for managing black and brunescent cataracts. The technique enables the surgeon to effectively disassemble the nucleus and perform a safe procedure with a short learning curve. FINANCIAL DISCLOSURE:No author has a financial or propri...
journal_title:Journal of cataract and refractive surgery
pub_type: 杂志文章
doi:10.1016/j.jcrs.2013.03.015
更新日期:2013-06-01 00:00:00
abstract:PURPOSE:To describe 7 patients who developed ectasia following laser in situ kerato-mileusis (LASIK). SETTING:Instituto de la Visión, Buenos Aires, Argentina. METHODS:In this retrospective study of 7 patients, visual acuity, refraction, pachymetry, and corneal topography were examined before and after the refractive ...
journal_title:Journal of cataract and refractive surgery
pub_type: 杂志文章
doi:10.1016/s0886-3350(01)00799-4
更新日期:2001-09-01 00:00:00
abstract::Horizontal chopping is effective for endocapsular nucleofractis. We describe pop and chop, a variant of chopping that enables an easy first crack and initial segment removal. It involves partial extracapsular prolapse of the nucleus prior to the initial chop. It is particularly useful when hydrodissection results in p...
journal_title:Journal of cataract and refractive surgery
pub_type: 杂志文章
doi:10.1016/s0886-3350(03)00339-0
更新日期:2003-11-01 00:00:00
abstract:PURPOSE:To evaluate whether photorefractive keratectomy (PRK) for moderate myopia using a solid-state laser with a wavelength of 213 nm alters the corneal endothelial cell density. SETTING:University refractive surgery center. METHODS:The corneal endothelium was analyzed preoperatively and 1, 6, and 12 months postope...
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.2007.06.042
更新日期:2007-11-01 00:00:00
abstract::I describe an intraoperative method for the consistent anchoring of the intraocular lens (IOL) and cataract surgery and on the patient's visual axis using coaxial microscope optics, surgeon-guided patient fixation, the precision pulse capsulotomy (PPC) device (Zepto) and utilizing the first (and fourth) Purkinje image...
journal_title:Journal of cataract and refractive surgery
pub_type: 杂志文章
doi:10.1016/j.jcrs.2018.02.013
更新日期:2018-05-01 00:00:00
abstract:PURPOSE:To evaluate the benefit of various surgical methods to address pseudophakic negative dysphotopsia. SETTING:Private practice, Los Angeles, California, USA. DESIGN:Interventional case series. METHODS:The following 4 surgical methods were used to treat negative dysphotopsia: secondary piggyback intraocular lens...
journal_title:Journal of cataract and refractive surgery
pub_type: 杂志文章
doi:10.1016/j.jcrs.2011.02.022
更新日期:2011-07-01 00:00:00
abstract:PURPOSE:To investigate the clinical outcomes after implantation of a new hydrophobic acrylic intraocular lens (IOL) with hydroxyethyl methacrylate (HEMA) at 1 year and 9 years postoperatively. SETTING:Three surgical sites in Japan. DESIGN:Prospective case series and retrospective review. METHODS:In 110 eyes of 110 p...
journal_title:Journal of cataract and refractive surgery
pub_type: 杂志文章
doi:10.1097/j.jcrs.0000000000000142
更新日期:2020-05-01 00:00:00
abstract:PURPOSE:To compare loteprednol etabonate (LE) gel 0.5% with prednisolone acetate suspension (PA) 1% for the treatment of inflammation after cataract surgery in children. SETTING:Eleven sites in the United States. DESIGN:Randomized, double-masked, parallel-group, noninferiority study. METHODS:Eligible patients were a...
journal_title:Journal of cataract and refractive surgery
pub_type: 杂志文章
doi:10.1097/j.jcrs.0000000000000218
更新日期:2020-08-01 00:00:00
abstract::A simple technique for the accurate surgical alignment of toric phakic and aphakic intraocular lenses (IOLs) is described. The mathematical relationship between toric misalignment and cylinder error is reviewed to demonstrate the importance of toric lens alignment in the setting of increased rotational stability with ...
journal_title:Journal of cataract and refractive surgery
pub_type: 杂志文章
doi:10.1016/j.jcrs.2008.04.041
更新日期:2008-10-01 00:00:00
abstract::A 25-year-old woman with moderate myopia presented for refractive surgery. Bilateral femtosecond laser-assisted small-incision lenticule extraction (SMILE) was scheduled and her right eye was completed smoothly. However, during the lenticule cutting of her left eye, a large inferior black area was noted. The operation...
journal_title:Journal of cataract and refractive surgery
pub_type: 杂志文章
doi:10.1097/j.jcrs.0000000000000185
更新日期:2020-06-01 00:00:00
abstract::For one year we followed 46 eyes that had photoastigmatic refractive keratectomy with an excimer laser to correct simple myopic astigmatism. Mean preoperative cylinder was -2.50 +/- 0.70 diopters (D); mean preoperative best corrected visual acuity was 20/25 +/- 1 Snellen line. Mean postoperative refraction one year af...
journal_title:Journal of cataract and refractive surgery
pub_type: 杂志文章
doi:10.1016/s0886-3350(13)80207-6
更新日期:1995-09-01 00:00:00
abstract:PURPOSE:Previous studies have reported conflicting results on the influence of seasons on post-cataract surgery endophthalmitis incidences. This study aimed to investigate the seasonality associated with the incidence of postoperative endophthalmitis, and to evaluate its association with climate variables in South Kore...
journal_title:Journal of cataract and refractive surgery
pub_type: 杂志文章
doi:10.1016/j.jcrs.2019.07.022
更新日期:2019-12-01 00:00:00
abstract:PURPOSE:To compare patient-reported tolerability, impact on quality of life, interference with activities of daily life, and ocular surface toxicity of branded nepafenac 0.3% and generic ketorolac 0.5% after cataract surgery. SETTING:Harvard Eye Associates, Laguna Hills, California, and the Cincinnati Eye Institute, O...
journal_title:Journal of cataract and refractive surgery
pub_type: 杂志文章,多中心研究,随机对照试验
doi:10.1016/j.jcrs.2018.08.039
更新日期:2019-02-01 00:00:00
abstract::We evaluated two topical cyclo-oxygenase inhibitors (COIs), 0.03% flurbiprofen and 1% indomethacin, for their ability to prevent pseudophakic cystoid macular edema (CME). The study was a randomized, double-masked, vehicle-controlled, parallel group, clinical trial for six months at eight sites in Canada and two in Ger...
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(13)80484-1
更新日期:1995-01-01 00:00:00
abstract:PURPOSE:To compare the relative degrees of adherence of a clinical strain of Pseudomonas aeruginosa to the optic material of four intraocular lenses (IOLs). SETTING:Center for Applied and Environmental Microbiology, Georgia State University, Atlanta, Georgia, USA. METHODS:Intraocular lens optics made of poly(methyl m...
journal_title:Journal of cataract and refractive surgery
pub_type: 杂志文章
doi:10.1016/s0886-3350(98)80085-0
更新日期:1998-01-01 00:00:00
abstract::This paper presents current clinical and experimental uses of the carbon dioxide laser and the results of our human and animal tissue fusion investigations. Trials were conducted with human scleral and corneal eye bank tissue and in albino rabbits. With power settings of 100 to 200 mW, optimal laser effect consisting ...
journal_title:Journal of cataract and refractive surgery
pub_type: 杂志文章
doi:10.1016/s0886-3350(87)80073-1
更新日期:1987-05-01 00:00:00
abstract:PURPOSE:To investigate the association between intraocular pressure (IOP), central corneal thickness (CCT), or both and wavefront aberrations in the anterior cornea and the whole eye in myopia. SETTING:Wenzhou Medical College, Wenzhou, Zhejiang, China. METHODS:Seventy myopic subjects were tested with a Humphrey corne...
journal_title:Journal of cataract and refractive surgery
pub_type: 杂志文章
doi:10.1016/j.jcrs.2007.04.012
更新日期:2007-08-01 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 assess an adherent ocular bandage for clear corneal incisions (CCIs) in cataract surgery using optical coherence tomography (OCT). SETTING:Prince Charles Eye Unit, Windsor, United Kingdom. DESIGN:Case-control study. METHODS:Patients having coaxial microincision cataract surgery (MICS) were allocated to an...
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.2010.06.058
更新日期:2010-11-01 00:00:00
abstract::The ocular response analyzer (ORA) (Reichert, Inc.) was used in the case of a middle-aged man who developed unilateral corneal ectasia after bilateral laser in situ keratomileusis (LASIK). The preoperative refraction was similar in the 2 eyes. Post-LASIK ectasia was central in the left eye; topography was oblate in th...
journal_title:Journal of cataract and refractive surgery
pub_type: 杂志文章
doi:10.1016/j.jcrs.2007.11.018
更新日期:2008-03-01 00:00:00
abstract:PURPOSE:To determine whether microcoaxial phacoemulsification can be reliably and safely performed in a clinical setting and whether a full-sized single-piece acrylic intraocular lens (IOL) can be implanted through a 2.2 mm incision. SETTING:Private practice, Cincinnati, Ohio, USA. METHOD:One hundred consecutive pati...
journal_title:Journal of cataract and refractive surgery
pub_type: 杂志文章
doi:10.1016/j.jcrs.2006.10.055
更新日期:2007-03-01 00:00:00
abstract::Anterior segment optical coherence tomography is a new method to explore the anterior chamber. The target can be focused and defocused with positive or negative lenses to reproduce the conditions of natural accommodation. We studied accommodation in an albino patient because the absence of pigment allows the infrared ...
journal_title:Journal of cataract and refractive surgery
pub_type: 杂志文章
doi:10.1016/j.jcrs.2003.12.043
更新日期:2004-03-01 00:00:00
abstract:PURPOSE:To evaluate safety, efficacy, predictability, and stability in the treatment of myopic astigmatism with laser in situ keratomileusis (LASIK) and photorefractive keratectomy (PRK) using the 200 Hz flying-spot technology of the LaserSight LSX excimer laser. SETTING:SynsLaser Clinic, Tromsø, Norway. METHODS:This...
journal_title:Journal of cataract and refractive surgery
pub_type: 杂志文章
doi:10.1016/s0886-3350(01)00996-8
更新日期:2001-08-01 00:00:00
abstract:PURPOSE:To evaluate the thickness and side-cut angle of laser in situ keratomileusis (LASIK) flaps created by 1 of 3 femtosecond lasers or a microkeratome using Fourier-domain optical coherence tomography (OCT). SETTING:Department of Ophthalmology, Institute of Vision Research, Yonsei University College of Medicine, S...
journal_title:Journal of cataract and refractive surgery
pub_type: 杂志文章
doi:10.1016/j.jcrs.2010.08.042
更新日期:2011-02-01 00:00:00