Abstract：
PURPOSE:To calculate theoretically the magnitude of the excess area between the lower surface of the flap and the underlying ablated stroma. METHODS:On the initial assumptions of a nonextensible flap and a spherical cornea, flap and ablated stromal areas were determined as a function of myopic correction in the range of 0 to -12 diopters (D) for typical values of corneal radius (7.8 mm) and flap thickness (160 microm), together with a range of ablation zone diameters (4.0 mm, 6.0 mm, 8.0 mm, and 10.0 mm). RESULTS:Excess flap area increases with the magnitude of the refractive correction and the diameter of the ablated zone. For a -6.0 D correction and an 8.0 mm ablation zone, the excess area is nominally about 1.0 mm(2), giving a potential overlap of the flap at the edge opposite the hinge of about 100 microm. CONCLUSIONS; Excess flap area may cause striae because of wrinkling. Although a nonextensible flap is assumed in the model, any stretching or contraction due to cutting the flap will be independent of the refractive correction. Hence, a mismatch in areas must still occur. This geometric effect may have clinical consequences in optical aberration, refractive regression, or impaired wound healing.
journal_name
J Cataract Refract Surgjournal_title
Journal of cataract and refractive surgeryauthors
Charman WNdoi
10.1016/s0886-3350(02)01636-xsubject
Has Abstractpub_date
2002-12-01 00:00:00pages
2146-52issue
12eissn
0886-3350issn
1873-4502pii
S088633500201636Xjournal_volume
28pub_type
杂志文章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 study the architecture of clear corneal incisions for phacoemulsification cataract surgery using optical coherence tomography (OCT). SETTING:Doheny Eye Institute and Department of Ophthalmology, Keck School of Medicine of the University of Southern California, Los Angeles, California, USA. METHODS:This pro...
journal_title：Journal of cataract and refractive surgery
pub_type： 杂志文章,多中心研究
doi：10.1016/j.jcrs.2008.05.026
更新日期：2008-09-01 00:00:00
abstract：:Four patients with diabetes mellitus had cataract extraction with implantation of a hydrophilic acrylic intraocular lens (IOL) (ACRL-C160, Ophthalmed). The IOLs showed progressive and generalized opacification 10 to 20 months after implantation, decreasing visual acuity. All 4 IOLs were removed. By light microscopic e...
journal_title：Journal of cataract and refractive surgery
pub_type： 杂志文章
doi：10.1016/s0886-3350(02)01245-2
更新日期：2002-07-01 00:00:00
abstract：:We report a patient who developed an anaphylactic reaction several minutes after intracameral injection of cefuroxime at the end of uneventful phacoemulsification and intraocular lens implantation surgery. The patient had a known allergy to penicillin but not to cefuroxime. This rare life-threatening complication was ...
journal_title：Journal of cataract and refractive surgery
pub_type： 杂志文章
doi：10.1016/j.jcrs.2013.06.008
更新日期：2013-09-01 00:00:00
abstract：UNLABELLED:Spontaneous late subluxation of an intraocular lens (IOL) is a rare but serious complication of cataract surgery, often associated with poor zonular support. The management of this complication with a conventional forceps is difficult because the forceps often cannot adequately grasp the optic or haptic to f...
journal_title：Journal of cataract and refractive surgery
pub_type： 杂志文章
doi：10.1016/j.jcrs.2012.12.004
更新日期：2013-02-01 00:00:00
abstract：PURPOSE:To evaluate the efficacy and safety of intracameral recombinant tissue plasminogen activator (rt-PA) application for fibrinolysis of fibrin formation after cataract surgery in children. SETTING:Johann Wolfgang Goethe-University, Department of Ophthalmology, Frankfurt am Main, Germany. METHODS:This study compr...
journal_title：Journal of cataract and refractive surgery
pub_type： 临床试验,杂志文章
doi：10.1016/s0886-3350(99)80083-2
更新日期：1999-03-01 00:00:00
abstract：:This case outlines the phacoemulsification technique used to overcome the challenge of the hyperdeep anterior chamber, weak zonules, abnormal anterior capsule, and large capsular bag. Key steps included trypan blue staining of the anterior capsule, a large capsulorhexis, prolapse of the nucleus into the anterior chamb...
journal_title：Journal of cataract and refractive surgery
pub_type： 杂志文章
doi：10.1016/j.jcrs.2005.12.143
更新日期：2006-07-01 00:00:00
abstract：:A 22-year-old woman presented with pain, redness, watering, and decrease in vision in her left eye 15 days after laser in situ keratomileusis for myopia. Slitlamp examination showed a central full-thickness infiltrate with hyphate edges. Microscopic examination of corneal scrapings from the edge and underneath the fla...
journal_title：Journal of cataract and refractive surgery
pub_type： 杂志文章
doi：10.1016/s0886-3350(99)00459-9
更新日期：2000-04-01 00:00:00
abstract：:We report 3 cases of Descemet's membrane detachment detected 2 to 3 weeks after surgery that was treated by intracameral injection of perfluoropropane 14% (C(3)F(8)) isoexpansile mixture. We looked at the predisposing factors, the best method of treatment, and the final outcome in cases of Descemet's membrane detachme...
journal_title：Journal of cataract and refractive surgery
pub_type： 杂志文章
doi：10.1016/s0886-3350(02)01919-3
更新日期：2003-06-01 00:00:00
abstract：PURPOSE:To evaluate the effect of a capsular tension ring (CTR) on the shape of the capsular bag, the extent of the capsular opening, and the shape of intraocular lenses (IOLs). SETTING:Department of Ophthalmology, College of Medicine, The Catholic University of Korea, Seoul, Korea. METHODS:The corneal button was rem...
journal_title：Journal of cataract and refractive surgery
pub_type： 杂志文章
doi：10.1016/s0886-3350(00)00610-6
更新日期：2001-03-01 00:00:00
abstract：PURPOSE:To evaluate the repeatability of the Galilei dual-Scheimpflug analyzer in measuring corneal curvature, wavefront aberrations, pachymetry, and anterior chamber depth (ACD). SETTING:Cullen Eye Institute, Baylor College of Medicine, Houston, Texas, USA. METHODS:Three consecutive measurements were performed in 1 ...
journal_title：Journal of cataract and refractive surgery
pub_type： 杂志文章
doi：10.1016/j.jcrs.2009.09.034
更新日期：2010-03-01 00:00:00
abstract：PURPOSE:To study the intensity of trypan blue and fluorescein staining over time in anterior lens capsules and various intraocular lens (IOL) materials. SETTING:Fritz Eye Associates, Geislingen, Germany. METHODS:Excised anterior lens capsules and IOLs were exposed to trypan blue 0.1% and fluorescein 2% solution to as...
journal_title：Journal of cataract and refractive surgery
pub_type： 杂志文章
doi：10.1016/s0886-3350(02)01238-5
更新日期：2002-06-01 00:00:00
abstract：:We describe a small-incision technique that reduces the phacoemulsification time. It reduces the risk for strong intraocular inflammation after surgery and posterior capsule rupture during surgery in young patients with uveitis. ...
journal_title：Journal of cataract and refractive surgery
pub_type： 杂志文章
doi：10.1016/j.jcrs.2008.03.047
更新日期：2008-08-01 00:00:00
abstract：PURPOSE:To determine and compare the amount of apoptosis and changes in rabbit corneal endothelial cell morphology after intracameral administration of different anesthetic agents. SETTING:Department of Ophthalmology, Baskent University Medical Faculty, Ankara, Turkey. METHODS:Right eyes of 64 Vienna white rabbits we...
journal_title：Journal of cataract and refractive surgery
pub_type： 杂志文章
doi：10.1016/j.jcrs.2008.12.016
更新日期：2009-04-01 00:00:00
abstract：PURPOSE:To examine the psychometric properties of the Visual Activities Questionnaire (VAQ) and each of its subscales in a modern cataract population using Rasch analysis and if flawed, to revise the VAQ and create a valid measure that maximizes its measurement properties. SETTING:Flinders Eye Centre, Flinders Medical...
journal_title：Journal of cataract and refractive surgery
pub_type： 杂志文章
doi：10.1016/j.jcrs.2009.05.058
更新日期：2009-11-01 00:00:00
abstract：PURPOSE:To evaluate the effect of genipin, a natural crosslinker, on porcine corneas. SETTING:Department of Ophthalmology, Universidad Nacional de Colombia, Bogota, Colombia. METHODS:Corneal strips (12.0 mm x 2.3 mm) were harvested from porcine eyes and treated by incubation with genipin at concentrations of 1.00%, 0...
journal_title：Journal of cataract and refractive surgery
pub_type： 杂志文章
doi：10.1016/j.jcrs.2009.11.003
更新日期：2010-04-01 00:00:00
abstract：:Eighty-two keratotomy procedures were performed for both idiopathic and postsurgical astigmatism or myopic astigmatism and analyzed for efficacy using vector and linear regression analysis. Delta keratometry values (delta K) were computed for each case as delta K in the desired axis of effect using vector analysis. Si...
journal_title：Journal of cataract and refractive surgery
pub_type： 杂志文章
doi：10.1016/s0886-3350(89)80134-8
更新日期：1989-01-01 00:00:00
abstract：:Twenty-eight epikeratophakia procedures have been performed at the University of Minnesota since December 1985. This report describes several technique modifications and compares the refractive and visual outcome of these cases with the national results. There have been 17 aphakic cases (13 adult and four pediatric), ...
journal_title：Journal of cataract and refractive surgery
pub_type： 杂志文章
doi：10.1016/s0886-3350(89)80091-4
更新日期：1989-05-01 00:00:00
abstract：:Cataract surgery was performed in a 63-year-old man with bilateral coloboma of the lens. There was no traumatic history, but the patient had lower zonule deficiency and zonular weakness in both eyes, leading us to suspect congenital coloboma of the lens. In the first eye having cataract surgery, it was impossible to r...
journal_title：Journal of cataract and refractive surgery
pub_type： 杂志文章
doi：10.1016/S0886-3350(03)00585-6
更新日期：2004-02-01 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:To evaluate the efficacy of epithelial-disruption collagen crosslinking (CXL) for progressive keratoconus using a corneal disruptor device and a riboflavin solution designed for a transepithelial technique. SETTING:Magna Graecia University Eye Clinic, Catanzaro, Italy. DESIGN:Prospective comparative case seri...
journal_title：Journal of cataract and refractive surgery
pub_type： 杂志文章
doi：10.1016/j.jcrs.2013.05.022
更新日期：2013-08-01 00:00:00
abstract：PURPOSE:To study the possible mechanisms of cataractogenesis by evaluating the characteristics of cataractous lens epithelial cells (LECs) in different types of human cataract. SETTING:Kangnam St. Mary's Hospital, The Catholic University of Korea, Seoul, Korea. METHODS:Lens epithelial cells attached to the anterior c...
journal_title：Journal of cataract and refractive surgery
pub_type： 杂志文章
doi：10.1016/s0886-3350(99)00009-7
更新日期：1999-05-01 00:00:00
abstract：PURPOSE:To study the microanatomic edge structures of anterior lens capsule specimens derived from manual and femtosecond laser-assisted capsulotomies. SETTING:Department of Ophthalmology, Goethe-University, Frankfurt, Germany. DESIGN:Experimental study. METHODS:Of 60 eyes with lens removal and intraocular lens impl...
journal_title：Journal of cataract and refractive surgery
pub_type： 杂志文章
doi：10.1016/j.jcrs.2013.07.024
更新日期：2013-10-01 00:00:00
abstract：:We describe a technique for cataract extraction in vitrectomized eyes that uses secured removal of the nucleus with no manipulation of the capsular bag. After a large scleral tunnel is prepared and a capsulorhexis created, a 20-gauge retinal cryoprobe enveloped in a plastic or a silicone sleeve is introduced into the ...
journal_title：Journal of cataract and refractive surgery
pub_type： 杂志文章
doi：10.1016/s0886-3350(02)01272-5
更新日期：2002-10-01 00:00:00
abstract：PURPOSE:To determine the safety and practicality of a combined anesthesiologist and registered nurse model of anesthesia care in cataract surgery. SETTING:Mayo Clinic, Rochester, Minnesota, USA. DESIGN:Case series. METHODS:This retrospective review comprised consecutive patients having phacoemulsification cataract s...
journal_title：Journal of cataract and refractive surgery
pub_type： 杂志文章
doi：10.1016/j.jcrs.2010.09.021
更新日期：2011-03-01 00:00:00
abstract：PURPOSE:To compare the efficacy of 30 minute preoperative versus 1 day postoperative administration of ketorolac tromethamine 0.5% ophthalmic solution (Acular) in reducing anterior chamber inflammation after cataract surgery. SETTING:The Hermann Eye Center, The University of Texas Health Science Center-Houston, Texas,...
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(00)00519-8
更新日期：2000-11-01 00:00:00
abstract：PURPOSE:To evaluate an algorithm for corneal power estimation in intraocular lens (IOL) power calculation after myopic laser refractive surgery using direct corneal measurements. SETTING:International Vision Correction Research Centre, University of Heidelberg, Heidelberg, Germany. METHODS:Corneal parameters in norma...
journal_title：Journal of cataract and refractive surgery
pub_type： 杂志文章
doi：10.1016/j.jcrs.2009.07.011
更新日期：2010-01-01 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：:Weill-Marchesani patients with cataractous lenses may presnet a surgical challenge in the presence of zonular weakness and microsherophakia. A 52-year-old Weill-Marchesani patient developed zonular dehiscence during capsule contraction after cataract extraction in her right eye. Use of a poly(methyl methacrylate) caps...
journal_title：Journal of cataract and refractive surgery
pub_type： 杂志文章
doi：10.1016/s0886-3350(98)80114-4
更新日期：1998-08-01 00:00:00
abstract：:We report 2 cases with a new type of after-cataract. In both, a milky white substance accumulated in a semicircular, closed chamber formed by the intraocular lens optic and the posterior lens capsule. Unlike in previous reports, the closed chamber did not cover the entire capsule but was based on residual lens remnant...
journal_title：Journal of cataract and refractive surgery
pub_type： 杂志文章
doi：10.1016/s0886-3350(02)01423-2
更新日期：2003-01-01 00:00:00
