Abstract:
PURPOSE:To determine the relationship between laser parameters and tissue removal with picosecond laser intrastromal photorefractive keratectomy (ISPRK) and to assess the effect of the parameters on the healing process and the long-term refractive changes. SETTING:Medical Laser Center Lübeck, Germany. METHODS:A modified Intelligent Surgical Lasers (ISL) 2001 system with a cone angle of 30 degrees was used for in vitro investigations of the laser effects in water and on the porcine cornea. Photographic methods were used to determine the plasma volume and to investigate the thickness of the intrastromal bubble layer as a function of the laser pulse energy, the number of layers in which the pulses were applied, and the layer separation. The data were used to calculate the amount of tissue removal. Histologic evaluation was done by polarization microscopy after Sirius-red staining. RESULTS:The laser pulses produced a sponge-like appearance of the stroma in a layer extending through about one third the corneal thickness, accompanied by mechanical distortions of the stromal lamellae. Thermal changes were weak. Tissue removal was impaired by the cavitation bubbles from preceding laser pulses. The amount of evaporated tissue depended only weakly on laser pulse energy and number of layers in which the pulses were applied. The maximum amount of tissue that could be evaporated without damaging the outer corneal layers was a 10.0 microm thick layer. With a 6.0 mm optical zone, the tissue removal produced an immediate refractive effect of only 0.85 diopter. CONCLUSIONS:Intrastromal PRK does not work as originally envisioned because the amount of evaporated tissue is very small. The greater long-term refractive changes observed in animal experiments and clinical studies must therefore be due to the healing response of the cornea. Because the refractive effects are strongly influenced by the healing response of the cornea, they are poorly predictable.
journal_name
J Cataract Refract Surgjournal_title
Journal of cataract and refractive surgeryauthors
Vogel A,Günther T,Asiyo-Vogel M,Birngruber Rdoi
10.1016/s0886-3350(97)80107-1subject
Has Abstractpub_date
1997-11-01 00:00:00pages
1301-10issue
9eissn
0886-3350issn
1873-4502pii
S0886-3350(97)80107-1journal_volume
23pub_type
杂志文章abstract:PURPOSE:To evaluate transient increases in intraocular pressure (IOP) after use of high-viscosity viscoelastic agents in cataract surgery. SETTING:Military Hospital, Ulm, Germany. METHODS:In a prospective, randomized study, we evaluated IOP following cataract surgery using two different viscoelastic substances (Healo...
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(96)80224-0
更新日期:1996-03-01 00:00:00
abstract:PURPOSE:To determine the reproducibility of morphoscopic contrast sensitivity test values in healthy subjects using the Visual Capacity Analyzer (VCA) (L2 Informatique). SETTING:Institute of Vision Research, Department of Ophthalmology, Yong-Dong Severance Hospital, Yonsei University, Seoul, South Korea. METHODS:Five...
journal_title:Journal of cataract and refractive surgery
pub_type: 杂志文章
doi:10.1016/s0886-3350(03)00044-0
更新日期:2003-09-01 00:00:00
abstract:PURPOSE:To determine whether cell adhesion on an intraocular lens (IOL) in Japanese patients is affected by the optic material. SETTING:Department of Ophthalmology, Wakayama Medical University, Wakayama, Japan. DESIGN:Experimental study. METHODS:Intraocular lenses of various materials explanted from Japanese patient...
journal_title:Journal of cataract and refractive surgery
pub_type: 杂志文章
doi:10.1016/j.jcrs.2011.04.001
更新日期:2011-07-01 00:00:00
abstract:PURPOSE:To study refraction variations during the day in eyes with intrastromal corneal ring segments (ICRS) to correct low myopia. SETTING:Monticelli Clinic, Marseille, France. METHODS:Thirteen eyes with ICRS were included in the study; the ICRS was explanted from 3 eyes because of undercorrection. The minimum follo...
journal_title:Journal of cataract and refractive surgery
pub_type: 杂志文章
doi:10.1016/s0886-3350(99)00129-7
更新日期:1999-08-01 00:00:00
abstract:PURPOSE:To compare the shape and volume of the lenticules of corneal tissue ablated for the correction of spherical, cylindrical, and spherocylindrical refractive errors using Boolean operations of theoretical 3-dimensional (3-D) surfaces. SETTING:Department of Ophthalmology, Rothschild Foundation, Paris, France. MET...
journal_title:Journal of cataract and refractive surgery
pub_type: 杂志文章
doi:10.1016/s0886-3350(02)01379-2
更新日期:2002-11-01 00:00:00
abstract:PURPOSE:To define factors affecting cataract surgery operating time for operating room planning, optimizing throughput, enhancing patient experiences, minimizing costs, and allocating training time. SETTING:Epsom and St. Helier University National Health Service Trust, London, United Kingdom. DESIGN:Retrospective cas...
journal_title:Journal of cataract and refractive surgery
pub_type: 杂志文章
doi:10.1016/j.jcrs.2019.01.002
更新日期:2019-06-01 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 levels of ischemia-modified albumin (IMA) in relation to oxidant-antioxidant profiles in the serum, aqueous, and lens in cataract patients. SETTING:Department of Ophthalmology, Menoufia University, Shebin El Kom, Menoufia, Egypt. DESIGN:Prospective case series. METHODS:Patients were divided i...
journal_title:Journal of cataract and refractive surgery
pub_type: 杂志文章
doi:10.1016/j.jcrs.2017.10.051
更新日期:2018-02-01 00:00:00
abstract::The first 45 cases of extracapsular cataract extraction, with posterior chamber intraocular lens implantation performed by ophthalmology residents at an urban county hospital were evaluated. These cases, which were performed from March 1983 to June 1984, involved a patient population that was primarily black and Hispa...
journal_title:Journal of cataract and refractive surgery
pub_type: 杂志文章
doi:10.1016/s0886-3350(86)80054-2
更新日期:1986-01-01 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 evaluate a poly(methyl methacrylate) refractive, zonal-progressive multifocal intraocular lens (IOL) in patients requiring cataract surgery. SETTING:Department of Ophthalmology, Saiseikai Kurihashi Hospital, Saitama, Japan. METHODS:This open-label noncomparative study evaluated 58 eyes of 31 Japanese patie...
journal_title:Journal of cataract and refractive surgery
pub_type: 杂志文章
doi:10.1016/s0886-3350(99)00408-3
更新日期:2000-07-01 00:00:00
abstract::The postoperative astigmatic course of unsutured and sutured 4.0 mm scleral pocket incisions was followed for one year in a small pilot study. Initially, with-the-rule changes were noted only in the sutured group; eventually both groups demonstrated a small against-the-rule change that did not differ clinically or sta...
journal_title:Journal of cataract and refractive surgery
pub_type: 杂志文章
doi:10.1016/s0886-3350(13)80607-4
更新日期:1993-07-01 00:00:00
abstract:PURPOSE:To evaluate the long-term impact of bilateral cataract surgery on postoperative complications, influence of age at surgery on the pattern of axial growth and central corneal thickness (CCT), and visual and orthoptic assessment in microphthalmic eyes. SETTING:Iladevi Cataract and IOL Research Centre, Ahmedabad,...
journal_title:Journal of cataract and refractive surgery
pub_type: 杂志文章
doi:10.1016/j.jcrs.2015.10.005
更新日期:2015-09-01 00:00:00
abstract:PURPOSE:To understand some of the variable refractive changes that occur during routine cataract surgery that could affect the accuracy and effectiveness of intraoperative aberrometry as it relates to the postoperative refractive state. SETTING:John A. Moran Eye Center, University of Utah, Salt Lake City, Utah, USA. ...
journal_title:Journal of cataract and refractive surgery
pub_type: 杂志文章
doi:10.1016/j.jcrs.2011.09.039
更新日期:2012-03-01 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 study the intraocular pressure (IOP) as a prognostic indicator on the first day after combined phacoemulsification and nonpenetrating deep sclerectomy. SETTING:Ramón y Cajal Hospital, Madrid, Spain. METHODS:This retrospective study included 70 eyes of 70 patients who had combined phacoemulsification-nonpen...
journal_title:Journal of cataract and refractive surgery
pub_type: 杂志文章
doi:10.1016/j.jcrs.2008.04.025
更新日期:2008-08-01 00:00:00
abstract:PURPOSE:To assess the refractive accuracy of different formulas for intraocular lens (IOL) power calculation in eyes with keratoconus. SETTING:IRCCS Fondazione Bietti, Rome, Italy. DESIGN:Multicenter retrospective interventional study. METHODS:A consecutive series of eyes with keratoconus that had cataract surgery w...
journal_title:Journal of cataract and refractive surgery
pub_type: 杂志文章,多中心研究
doi:10.1016/j.jcrs.2018.11.029
更新日期:2019-05-01 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::We describe a technique for creating a continuous curvilinear capsulorhexis (CCC) using an endoscope. Three 2.0 mm limbal incisions 120 degrees apart were made in 4 cadaver eyes. The anterior capsule was stained with trypan blue 0.1% (Vision Blue). Under endoscopic visualization, a CCC was attempted in each of the 4 g...
journal_title:Journal of cataract and refractive surgery
pub_type: 杂志文章
doi:10.1016/j.jcrs.2003.09.051
更新日期:2004-05-01 00:00:00
abstract:PURPOSE:To compare complication rates, visual acuity, and refractive outcomes of secondary intraocular lens (IOLs) implantation. SETTING:Department of Ophthalmology, Cullen Eye Institute, Baylor College of Medicine, Houston, Texas, USA. DESIGN:Retrospective case series. METHODS:All secondary IOLs placed by the anter...
journal_title:Journal of cataract and refractive surgery
pub_type: 杂志文章
doi:10.1016/j.jcrs.2016.12.024
更新日期:2017-03-01 00:00:00
abstract:PURPOSE:To study prospectively the success rate and complications of deep sclerectomy with collagen implant (DSCI), a nonpenetrating filtration procedure. SETTING:Glaucoma Unit, Department of Ophthalmology, Hôpital Ophtalmique Jules Gonin, University of Lausanne, Lausanne, Switzerland. METHODS:This nonrandomized pros...
journal_title:Journal of cataract and refractive surgery
pub_type: 临床试验,杂志文章
doi:10.1016/s0886-3350(01)01032-x
更新日期:2001-11-01 00:00:00
abstract:PURPOSE:To evaluate noncorneal astigmatism after implantation of a one-piece, plate-haptic silicone or one-piece poly(methyl methacrylate) PMMA intraocular lens (IOL). SETTING:Klinik und Poliklinik für Augenheilkunde der Universität Regensburg, Germany. METHODS:After a follow-up of at least 3 months, the degree of po...
journal_title:Journal of cataract and refractive surgery
pub_type: 杂志文章
doi:10.1016/s0886-3350(97)80117-4
更新日期:1997-11-01 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 investigate if a combination of topical nonsteroid anti-inflammatory drugs (NSAIDs) and steroids were superior in controlling early postoperative inflammation after cataract surgery compared with topical NSAIDs alone and with dropless surgery where a subtenon depot of steroid was placed during surgery. SETT...
journal_title:Journal of cataract and refractive surgery
pub_type: 杂志文章
doi:10.1097/j.jcrs.0000000000000455
更新日期:2020-10-16 00:00:00
abstract:PURPOSE:To assess the repeatability and agreement of corneal power, corneal astigmatism, axis location, and astigmatic vector component measurements using an autokeratometer and a corneal topographer in healthy subjects. SETTING:Department of Ophthalmology, Kitasato University, Kanagawa, Japan. DESIGN:Evaluation of d...
journal_title:Journal of cataract and refractive surgery
pub_type: 杂志文章
doi:10.1016/j.jcrs.2011.11.026
更新日期:2012-04-01 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::Any ocular surface disease (OSD), but most commonly, dry-eye disease (DED), can reduce visual quality and quantity and adversely affect refractive measurements before keratorefractive and phacorefractive surgeries. In addition, ocular surgery can exacerbate or induce OSD, leading to worsened vision, increased symptoms...
journal_title:Journal of cataract and refractive surgery
pub_type: 杂志文章,评审
doi:10.1016/j.jcrs.2019.03.023
更新日期:2019-05-01 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::Small incision cataract surgery has several advantages over conventional surgery, including faster postoperative visual rehabilitation. We evaluated 100 consecutive cases of no-stitch, small incision surgery with a square sclerocorneal tunnel and a flexible intraocular lens. Permanent self-sealing of the wound seemed ...
journal_title:Journal of cataract and refractive surgery
pub_type: 杂志文章
doi:10.1016/s0886-3350(13)80234-9
更新日期:1994-09-01 00:00:00
abstract::We describe a technique for making an optimal flange in intraocular lenses (IOLs) used for flanged intrascleral IOL fixation. The flange shape varies in poly(methyl methacrylate) (PMMA) haptics of different IOLs of different manufacturers. We identified the distance between the forceps grip of the haptic and the end o...
journal_title:Journal of cataract and refractive surgery
pub_type: 评论,杂志文章
doi:10.1016/j.jcrs.2018.07.042
更新日期:2018-11-01 00:00:00