Abstract：
PURPOSE:To validate clinically in a normal healthy population an algorithm to correct the error in the keratometric estimation of corneal power based on the use of a variable keratometric index of refraction (n(k)). SETTING:Medimar International Hospital (Oftalmar) and University of Alicante, Alicante, Spain. DESIGN:Case series. METHODS:Corneal power was measured with a Scheimpflug photography-based system (Pentacam software version 1.14r01) in healthy eyes with no previous ocular surgery. In all cases, keratometric corneal power was also estimated using an adjusted value of n(k) that is dependent on the anterior corneal radius (r(1c)) as follows: n(kadj) = -0.0064286 r(1c) +1.37688. Agreement between the Gaussian (P(c)(Gauss)) and adjusted keratometric (P(kadj)) corneal power values was evaluated. RESULTS:The study evaluated 92 eyes (92 patients; age range 15 to 64 years). The mean difference between P(c)(Gauss) and P(kadj) was -0.02 diopter (D) ± 0.22 (SD) (P=.43). A very strong, statistically significant correlation was found between both corneal powers (r = .994, P<.01). The range of agreement between P(c)(Gauss) and P(kadj) was 0.44 D, with limits of agreement of -0.46 and +0.42 D. In addition, a very strong, statistically significant correlation of the difference between P(c)(Gauss) and P(kadj) and the posterior corneal radius was found (r = 0.96, P<.01). CONCLUSION:The imprecision in the calculation of corneal power using keratometric estimation can be minimized in clinical practice by using a variable keratometric index that depends on the radius of the anterior corneal surface. 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
Piñero DP,Camps VJ,Mateo V,Ruiz-Fortes Pdoi
10.1016/j.jcrs.2012.03.026subject
Has Abstractpub_date
2012-08-01 00:00:00pages
1333-8issue
8eissn
0886-3350issn
1873-4502pii
S0886-3350(12)00613-Xjournal_volume
38pub_type
杂志文章abstract：PURPOSE:To compare near vision and quality of vision after controlling for pseudoaccommodation in patients with single-optic accommodating intraocular lenses (IOLs) or monofocal IOLs targeted for mini-monovision. SETTING:Clinical practice. DESIGN:Prospective randomized controlled clinical trial. METHODS:Patients wer...
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.2012.08.059
更新日期：2013-01-01 00:00:00
abstract：PURPOSE:To evaluate the safety and complication rates of excimer laser photorefractive keratectomy (PRK). SETTING:Assutah Laser Center, Tel-Aviv, Israel. METHODS:This retrospective study evaluated the complication rate after PRK in 825 consecutive patients who had PRK for myopia and had a follow-up of at least 12 mon...
journal_title：Journal of cataract and refractive surgery
pub_type： 杂志文章
doi：10.1016/s0886-3350(97)80311-2
更新日期：1997-10-01 00:00:00
abstract：:The prophylactic intraoperative use of mitomycin-C (MMC) to prevent haze and scarring after excimer laser surface ablation (phototherapeutic/photorefractive keratectomy [PTK/PRK]) in an eye with a previous laser in situ keratomileusis (LASIK) flap buttonhole with epithelial ingrowth is described. A well-centered butto...
journal_title：Journal of cataract and refractive surgery
pub_type： 杂志文章
doi：10.1016/j.jcrs.2005.06.035
更新日期：2005-10-01 00:00:00
abstract：PURPOSE:To evaluate the visual results and complications of angle-supported phakic intraocular lenses (IOLs) to correct myopia associated with early-stage keratoconus. SETTING:Private practice, Siena, Italy. METHODS:In a prospective noncomparative single-surgeon interventional case series, outcomes in 12 consecutive ...
journal_title：Journal of cataract and refractive surgery
pub_type： 杂志文章
doi：10.1016/s0886-3350(03)00346-8
更新日期：2003-08-01 00:00:00
abstract：PURPOSE:To study the safety and efficacy of refractive enhancement by flap lifting 5 and 10 years after laser in situ keratomileusis (LASIK). SETTING:Vissum Alicante, Spain. DESIGN:Retrospective case series. METHODS:Eyes with a flap lift at least 5 years after primary LASIK with a 3-month follow-up were evaluated. T...
journal_title：Journal of cataract and refractive surgery
pub_type： 杂志文章
doi：10.1016/j.jcrs.2019.05.030
更新日期：2019-10-01 00:00:00
abstract：:We used the finite element method to evaluate different capsulotomy techniques. Nucleus expression was simulated in a computer model to visualize stress distribution in the anterior capsule. The finite element model demonstrated that the capsulorhexis edge is strong because of low and uniform stress distribution in th...
journal_title：Journal of cataract and refractive surgery
pub_type： 杂志文章
doi：10.1016/s0886-3350(13)80176-9
更新日期：1994-07-01 00:00:00
abstract：PURPOSE:To evaluate the factors associated with the efficacy of femtosecond laser intrastromal astigmatic keratotomy (AK). SETTING:Moorfields Eye Hospital, London, United Kingdom. DESIGN:Prospective case series. METHODS:Eyes having intrastromal AK for corneal cylinder correction were analyzed. Preoperative biometric...
journal_title：Journal of cataract and refractive surgery
pub_type： 杂志文章
doi：10.1016/j.jcrs.2015.09.028
更新日期：2016-02-01 00:00:00
abstract：PURPOSE:To measure the rheological behaviour of artificial tears to gain insight into the potential role of rheology in predicting the efficacy of artificial tear solutions for the treatment of dry eye disease (DED). SETTING:Research laboratories of I-MED Pharma, Canada, Rohn and Associates, Inc., New Jersey, and Hyda...
journal_title：Journal of cataract and refractive surgery
pub_type： 杂志文章
doi：10.1097/j.jcrs.0000000000000507
更新日期：2020-11-30 00:00:00
abstract：PURPOSE:To evaluate the results and complications of hyperopic laser in situ keratomileusis (LASIK) with a low-energy femtosecond laser and non-custom tissue-saving ablation profile. SETTING:Private practice, Siena, Italy. DESIGN:Case series. METHODS:Hyperopic eyes with a spherical equivalent (SE) between +1.0 and +...
journal_title：Journal of cataract and refractive surgery
pub_type： 杂志文章
doi：10.1016/j.jcrs.2013.11.031
更新日期：2014-07-01 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：PURPOSE:To evaluate the changes in pupil size after implantation of an iris-supported toric phakic intraocular lens (TPIOL) for correction of myopia and hyperopia with astigmatism. SETTING:Department of Ophthalmology, Johannes Gutenberg-University, Mainz, Germany. METHODS:Twenty-two myopic eyes and 9 hyperopic eyes w...
journal_title：Journal of cataract and refractive surgery
pub_type： 杂志文章
doi：10.1016/j.jcrs.2004.04.040
更新日期：2005-02-01 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：:A 73-year-old woman with bilateral previous radial keratotomies (RK) and symptomatic cataracts was referred. The uncorrected distance visual acuity (UDVA) was 0.24 logarithm of the minimum angle of resolution (logMAR) in the left eye and 0.32 logMAR in the left eye. The American Society of Cataract and Refractive Surg...
journal_title：Journal of cataract and refractive surgery
pub_type： 杂志文章
doi：10.1016/j.jcrs.2018.06.005
更新日期：2018-08-01 00:00:00
abstract：:Eighteen surgeons performed 166 consecutive epikeratoplasty procedures to correct myopia in 103 patients. Of this total, 147 (89%) were first surgeries and 19 (11%) were repeat surgeries. First surgery patients were divided into three subpopulations based on preoperative spherical equivalents (low -5.00 diopters [D] t...
journal_title：Journal of cataract and refractive surgery
pub_type： 杂志文章
doi：10.1016/s0886-3350(13)80869-3
更新日期：1990-01-01 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：PURPOSE:To compare the effects of fluidic parameters on the central corneal thickness (CCT), corneal endothelium, and anterior segment inflammation after phacoemulsification with longitudinal ultrasound. SETTING:Iladevi Cataract & IOL Research Center, Ahmedabad, India. METHODS:In this prospective randomized patient- ...
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.2009.11.009
更新日期：2010-04-01 00:00:00
abstract：:We present a simple, effective technique to remove an intraocular lens (IOL) via a very small incision (2.2 mm). After the IOL is carefully removed from the capsular bag, into the anterior chamber, 2 radial incisions, 35 degrees to 50 degrees apart, are made with a Vannas scissors. This results in 2 IOL pieces (maximu...
journal_title：Journal of cataract and refractive surgery
pub_type： 杂志文章
doi：10.1016/j.jcrs.2009.02.036
更新日期：2009-07-01 00:00:00
abstract：:To evaluate the biocompatibility of various materials including a poly(2-hydroxyethyl methacrylate [HEMA])/(6-hydroxyhexyl methacrylate [HOHEXMA]) hydrophilic hydrogel intraocular lens (IOL) (Hydroview, Bausch & Lomb). Department of Ophthalmology, Wakayama Medical University, Wakayama, Japan. Ten opacified anterior ca...
journal_title：Journal of cataract and refractive surgery
pub_type： 杂志文章
doi：10.1016/s0886-3350(02)01988-0
更新日期：2003-06-01 00:00:00
abstract：:We describe 2 complications of sequential keratorefractive and vitreoretinal surgery not previously reported. Epithelial ingrowth occurred in 1 patient who experienced laser in situ keratomileusis flap dehiscence and replacement during vitreoretinal surgery. In the second patient, a flap could not be created with a mi...
journal_title：Journal of cataract and refractive surgery
pub_type： 杂志文章
doi：10.1016/j.jcrs.2006.05.038
更新日期：2006-12-01 00:00:00
abstract：:We describe a technique to prevent late intraocular lens (IOL) subluxation and dislocation that can be associated with progressive zonulopathy. Supracapsular glued IOL fixation is done to retain an intact anterior hyaloid face and avoid vitreous disturbance while providing stable long-term IOL fixation. Phacoemulsific...
journal_title：Journal of cataract and refractive surgery
pub_type： 杂志文章
doi：10.1016/j.jcrs.2017.02.006
更新日期：2017-03-01 00:00:00
abstract：PURPOSE:To present a series of cases in which the four-flanged technique was used in the management of in-the-bag intraocular lens (IOL) subluxation. SETTING:Shamir medical center, Israel. DESIGN:Retrospective cohort analysis. METHODS:Included were consecutive cases with secondary IOL subluxation that underwent scle...
journal_title：Journal of cataract and refractive surgery
pub_type： 杂志文章
doi：10.1097/j.jcrs.0000000000000474
更新日期：2020-11-02 00:00:00
abstract：PURPOSE:To evaluate the impact of higher-order aberrations on depth of focus using an adaptive optics visual simulator. SETTING:Refractive Surgery Department, Cole Eye Institute, Cleveland Clinic, Cleveland, Ohio, USA. METHODS:An adaptive optics simulator was used to optically introduce individual aberrations in eyes...
journal_title：Journal of cataract and refractive surgery
pub_type： 杂志文章
doi：10.1016/j.jcrs.2009.05.059
更新日期：2009-11-01 00:00:00
abstract：:In eyes with low scleral rigidity, penetrating keratoplasty (PKP) is a high-risk procedure because forward movement of the lens-iris diaphragm can result in prolapse of intraocular contents, expulsive choroidal hemorrhage, and damage to the crystalline lens. We developed a method for safer PKP in eyes with low scleral...
journal_title：Journal of cataract and refractive surgery
pub_type： 临床试验,杂志文章
doi：10.1016/s0886-3350(99)00071-1
更新日期：1999-07-01 00:00:00
abstract：PURPOSE:To perform a pilot study of a new in-the-bag Fresnel prism intraocular lens (IOL) designed to deviate the image from diseased to healthy retina in eyes with bilateral age-related macular degeneration (AMD). SETTING:Anterior segment subspeciality practice, Pretoria, South Africa. DESIGN:Prospective nonmasked t...
journal_title：Journal of cataract and refractive surgery
pub_type： 临床试验,杂志文章
doi：10.1016/j.jcrs.2013.10.049
更新日期：2014-07-01 00:00:00
abstract：PURPOSE:To assess the long-term results and complications of scleral-fixated posterior chamber intraocular lenses (PC IOLs) with the knotless Z-suture technique. SETTING:University Eye Hospital, Tübingen, Germany. DESIGN:Retrospective case series. METHODS:Records of consecutive patients who had implantation of scler...
journal_title：Journal of cataract and refractive surgery
pub_type： 杂志文章
doi：10.1016/j.jcrs.2017.11.009
更新日期：2018-02-01 00:00:00
abstract：:Intraocular metallic-appearing foreign bodies in the anterior segment were seen in six eyes after cataract extraction by two-handed phacoemulsification. These fragments produced no symptoms and had no clinically significant effect on visual function. Similar-appearing foreign bodies were experimentally produced by app...
journal_title：Journal of cataract and refractive surgery
pub_type： 杂志文章
doi：10.1016/s0886-3350(96)80078-2
更新日期：1996-11-01 00:00:00
abstract：:A prospective study of function and fixation was done on 40 patients implanted with small incision poly(methyl methacrylate), single piece, biconvex intraocular lenses after in situ phacoemulsification cataract extraction via a continuous curvilinear capsulorhexis. A 5.0 mm circular optic (Pharmacia 740 P), 14 mm leng...
journal_title：Journal of cataract and refractive surgery
pub_type： 杂志文章
doi：10.1016/s0886-3350(13)80919-4
更新日期：1992-03-01 00:00:00
abstract：:A candidate for refractive surgery presented with classic (type I) Ehlers-Danlos syndrome (EDS). Clinical examination revealed blue sclera, limbus-to-limbus corneal thinning, myopia, and astigmatism. Orbscan (Bausch & Lomb) pachymetry mapping provided a striking demonstration of the limbus-to-limbus thinning with a ce...
journal_title：Journal of cataract and refractive surgery
pub_type： 杂志文章
doi：10.1016/j.jcrs.2004.05.002
更新日期：2004-08-01 00:00:00
abstract：PURPOSE:To assess the efficacy of viscocanalostomy in eyes with uncontrolled glaucoma secondary to uveitis. SETTING:Immunology and Uveitis Service, Department of Ophthalmology and Visual Sciences, University Hospital San Raffaele, Milan, Italy. METHODS:All consecutive patients with glaucoma secondary to uveitis and i...
journal_title：Journal of cataract and refractive surgery
pub_type： 杂志文章
doi：10.1016/j.jcrs.2003.10.029
更新日期：2004-03-01 00:00:00
abstract：:A 25-year-old woman with myopia who had an AC pIOL implantation in the left eye and posterior chamber pIOL implantation in the right eye developed bilateral granulomatous panuveitis 2 months after the second surgery. Physical examination showed bilateral Koeppe and Busacca nodules. Fluorescein angiography showed diffu...
journal_title：Journal of cataract and refractive surgery
pub_type： 杂志文章
doi：10.1016/j.jcrs.2012.02.026
更新日期：2012-06-01 00:00:00
