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 varies strongly with a radial location. Retinal angles subtended at the second nodal point were used to linearly scale retinal locations to a polar plot in object space, weighting rays by the object luminance, the total transmittance, and a cosine normalization for pupil effects. Improved scaling using a phakic 70-year-old eye was also explored. RESULTS:Images demonstrate a distinct shadow with a 2.5 mm pupil between the upper limit of the text image formed by the intraocular lens (IOL) and a second larger image due to light missing the IOL. The shadow is rapidly softened by a small increase in pupil diameter. CONCLUSIONS:The images verified characteristics that previously were only inferred indirectly: (1) With a 2.5 mm pupil, there is a prominent dark shadow. (2) Light missing the IOL experiences lower power and forms a larger image and also comes from a lower visual angle. (3) A small increase in pupil diameter causes the shadow to fade. The calculations showed that imaging in the far periphery is very different for the pseudophakic eye in comparison with the phakic eye. The limit of the focused image is probably the primary cause of the shadow, yet relatively few patients find this to be bothersome.
journal_name
J Cataract Refract Surgjournal_title
Journal of cataract and refractive surgeryauthors
Simpson MJdoi
10.1097/j.jcrs.0000000000000103subject
Has Abstractpub_date
2020-03-01 00:00:00pages
451-458issue
3eissn
0886-3350issn
1873-4502pii
02158034-202003000-00018journal_volume
46pub_type
杂志文章abstract：PURPOSE:To investigate the effects of phacoemulsification in glaucomatous eyes with functioning Baerveldt tube shunts. SETTING:Department of Ophthalmology, Mayo Clinic College of Medicine, Rochester, Minnesota, USA. METHODS:This retrospective analysis followed 9 eyes of 8 patients with functioning Baerveldt tube shun...
journal_title：Journal of cataract and refractive surgery
pub_type： 杂志文章
doi：10.1016/j.jcrs.2006.04.008
更新日期：2006-09-01 00:00:00
abstract：PURPOSE:To establish a refractive surgery unit at Tilganga Institute of Ophthalmology through support from international donations and provide knowledge transfer for doctors and management to make the unit self-sustaining, nonprofit laser refractive surgery, and financial support for other eyecare projects at Tilganga....
journal_title：Journal of cataract and refractive surgery
pub_type： 杂志文章
doi：10.1016/j.jcrs.2018.05.023
更新日期：2018-08-01 00:00:00
abstract：PURPOSE:To evaluate visual quality after laser in situ keratomileusis (LASIK) performed to achieve monovision in presbyopic patients. SETTING:Laboratory of Vision Sciences and Applications, Department of Optics, University of Granada, Granada, and Clínica Novovisión, Madrid, Spain. DESIGN:Cohort study. METHODS:Laser...
journal_title：Journal of cataract and refractive surgery
pub_type： 杂志文章
doi：10.1016/j.jcrs.2011.03.042
更新日期：2011-09-01 00:00:00
abstract：PURPOSE:To study the change in postoperative position of an angulated, 3-piece, foldable acrylic intraocular lenses (IOLs) and evaluate the effect of a sharp posterior optic edge compared with that of a round optic edge on the change in postoperative anterior chamber depth (ACD). SETTING:Department of Ophthalmology, U...
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(02)02049-7
更新日期：2003-10-01 00:00:00
abstract：PURPOSE:To assess the safety, efficacy, and predictability in eyes that had refractive lens exchange (RLE) with implantation of a spherical diffractive intraocular lens (IOL) after previous hyperopic laser in situ keratomileusis (LASIK). SETTING:Fernández-Vega Ophthalmological Institute, Oviedo, Spain. METHODS:This p...
journal_title：Journal of cataract and refractive surgery
pub_type： 杂志文章
doi：10.1016/j.jcrs.2009.04.045
更新日期：2009-10-01 00:00:00
abstract：:We describe a technique for stromal expansion of thin and ultrathin corneas in keratoconus patients that uses refractive stromal lenticules of patients having small-incision lenticule extraction for myopic correction. The stromal lenticule is placed and spread over the host cornea following epithelial debridement so t...
journal_title：Journal of cataract and refractive surgery
pub_type： 杂志文章
doi：10.1016/j.jcrs.2015.04.007
更新日期：2015-05-01 00:00:00
abstract：PURPOSE:To evaluate the incidence of epithelial disruptions during primary laser in situ keratomileusis (LASIK) with the use of a preoperative hyperosmotic treatment comprising sodium chloride 5% ophthalmic ointment (Muro-128) and to identify the incidence of epithelial disruptions in various demographic populations. ...
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.2014.07.042
更新日期：2015-05-01 00:00:00
abstract：PURPOSE:To determine the ability of the limulus amoebocyte lysate (LAL) assay and the in vitro pyrogen test (IPT) to detect pyrogens adsorbed to intraocular lenses (IOLs). SETTING:Berlin Eye Research Institute, Berlin, Germany. METHODS:Fifteen of each of the following IOLs were used: MicroSil MS 612 ASP, AcrySof SA60...
journal_title：Journal of cataract and refractive surgery
pub_type： 杂志文章
doi：10.1016/j.jcrs.2009.03.012
更新日期：2009-07-01 00:00:00
abstract：:We developed and evaluated a method of visualizing vitreous gel in the anterior segment. In this study, 0.2 mL of injectable triamcinolone (Kenalog) 40 mg/mL was captured in a 5 microm filter and rinsed with 2 mL of balanced salt solution (BSS). It was then resuspended in 5 mL of BSS and recaptured to thoroughly remov...
journal_title：Journal of cataract and refractive surgery
pub_type： 临床试验,杂志文章
doi：10.1016/s0886-3350(03)00016-6
更新日期：2003-04-01 00:00:00
abstract：PURPOSE:To evaluate and compare the incidence of cyanopsia using the neutralization method in eyes in which clear or yellow intraocular lenses (IOLs) were implanted. SETTING:Miyata Eye Clinic, Hiroshima, Japan. DESIGN:Retrospective comparative study. METHODS:Patients who had cataract surgery with the implantation of...
journal_title：Journal of cataract and refractive surgery
pub_type： 杂志文章
doi：10.1016/j.jcrs.2014.07.040
更新日期：2015-04-01 00:00:00
abstract：PURPOSE:To define one possible etiology for the rise in intraocular pressure (IOP) after neodymium: YAG (Nd:YAG) laser capsulotomy and provide information for the continued investigation of this process. SETTING:Laser Center, Eye and Ear Institute, Pittsburgh, Pennsylvania. METHODS:Samples of 1% sodium hyaluronate or...
journal_title：Journal of cataract and refractive surgery
pub_type： 杂志文章
doi：10.1016/s0886-3350(96)80315-4
更新日期：1996-07-01 00:00:00
abstract：PURPOSE:To compare the development of posterior capsule opacification (PCO) and neodymium:YAG (Nd:YAG) capsulotomy rates between 2 microincision intraocular lenses (IOLs) 4 years after surgery. SETTING:Department of Ophthalmology, Medical University of Vienna, Vienna, Austria. DESIGN:Prospective randomized clinical t...
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.2014.09.037
更新日期：2015-05-01 00:00:00
abstract：:We received approval from the U.S. implant Food and Drug Administration and the University's Institutional Review Board to the Artisan lens (Ophtec BV) in both eyes of a patient who was aphakic and had megalocornea. No other intraocular lens would easily solve this patient's need because of the large anterior segment....
journal_title：Journal of cataract and refractive surgery
pub_type： 杂志文章
doi：10.1016/j.jcrs.2005.12.060
更新日期：2006-03-01 00:00:00
abstract：PURPOSE:To compare the 6-month results of accelerated and standard collagen crosslinking (CXL) treatment of progressive keratoconus. SETTING:Noor Eye Hospital, Tehran, Iran. DESIGN:Prospective randomized clinical trial. METHODS:Two groups of eyes (intervention and control) received corneal collagen crosslinking (CXL...
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.2014.07.030
更新日期：2015-03-01 00:00:00
abstract：:We report six-month results of the Summit Technology Myopic Keratomileusis Phase I multicenter study. Fifty-seven eyes of 57 patients had keratomileusis to correct high myopia. A microkeratome was used for the primary keratectomy and the excimer laser was used to ablate the stroma of the resected lenticle (cap) or the...
journal_title：Journal of cataract and refractive surgery
pub_type： 临床试验,杂志文章,多中心研究
doi：10.1016/s0886-3350(13)80648-7
更新日期：1994-11-01 00:00:00
abstract：PURPOSE:To assess the effect of folding procedures on modulation transfer function (MTF) and resolving power (RP) in soft acrylic intraocular lenses (IOLs). SETTING:Faculty of Engineering, Chiba University, Chiba, Japan. METHODS:Folding procedures and other manipulations were performed on +18.0 diopter soft acrylic l...
journal_title：Journal of cataract and refractive surgery
pub_type： 杂志文章
doi：10.1016/s0886-3350(96)80098-8
更新日期：1996-01-01 00:00:00
abstract：:Visual acuity and contrast sensitivity after cataract surgery were evaluated in best-case eyes that received a Storz bifocal zonal intraocular lens (IOL) or a 3M diffractive multifocal IOL. A group of eyes with a monofocal IOL was used as a control. Postoperatively, all eyes had a best corrected visual acuity of 20/40...
journal_title：Journal of cataract and refractive surgery
pub_type： 杂志文章
doi：10.1016/s0886-3350(13)80536-6
更新日期：1995-07-01 00:00:00
abstract：PURPOSE:To compare the volumetric occlusion break surge responses of phacoemulsification units from 1 company over 3 generations under varying vacuum limits and target intraocular pressure (IOP) settings. SETTING:Alcon Research, Ltd., Lake Forest, California, USA. DESIGN:Experimental study. METHODS:Three generations...
journal_title：Journal of cataract and refractive surgery
pub_type： 杂志文章
doi：10.1016/j.jcrs.2018.01.032
更新日期：2018-12-01 00:00:00
abstract：PURPOSE:To determine the astigmatic effect of a supero-oblique clear corneal phacoemulsification cataract incision. SETTING:A university-based general ophthalmology practice. METHODS:All eyes having supero-oblique phacoemulsification cataract surgery using the right hand of a single surgeon between April 17, 1997, an...
journal_title：Journal of cataract and refractive surgery
pub_type： 杂志文章
doi：10.1016/s0886-3350(99)00074-7
更新日期：1999-07-01 00:00:00
abstract：PURPOSE:To observe changes in intraocular pressure (IOP), the manner in which the eye is suctioned, and the effect of the number of suction ports. SETTING:Department of Ophthalmology, Tokyo Dental College, Suidobashi Hospital, Tokyo, Japan. METHODS:Suction rings with single or dual ports were made of transparent acry...
journal_title：Journal of cataract and refractive surgery
pub_type： 杂志文章
doi：10.1016/j.jcrs.2004.06.085
更新日期：2005-03-01 00:00:00
abstract：:A patient with bilateral Salzmann's nodular degeneration developed a myopic shift of 9 diopters in the right eye and 5 diopters in the left eye after removal of his nodules. This previously unreported complication of removal of peripheral corneal pathology is discussed in light of our current understanding of keratore...
journal_title：Journal of cataract and refractive surgery
pub_type： 杂志文章
doi：10.1016/s0886-3350(13)80658-x
更新日期：1994-11-01 00:00:00
abstract：:We report 2 patients who experienced progressive blurring of vision following myopic laser in situ keratomileusis (LASIK) in 1 eye (Case 1) and bilaterally (Case 2). High against-the-rule astigmatism, associated with perilimbal thinning inferiorly, was seen on refraction in all eyes. Regional corneal pachymetry confir...
journal_title：Journal of cataract and refractive surgery
pub_type： 杂志文章
doi：10.1016/s0886-3350(03)00047-6
更新日期：2003-04-01 00:00:00
abstract：PURPOSE:To describe the postoperative evolution of visual acuity, flap morphology, and stromal optical density femtosecond laser-assisted laser in situ keratomileusis (FS-LASIK). SETTING:Clínica Rementería, Madrid, Spain. DESIGN:Prospective case series. METHODS:The study comprised 44 consecutive eyes that had FS-LAS...
journal_title：Journal of cataract and refractive surgery
pub_type： 杂志文章
doi：10.1097/j.jcrs.0000000000000008
更新日期：2020-02-01 00:00:00
abstract：PURPOSE:To evaluate changes in anterior chamber depth (ACD) and intraocular pressure (IOP) after phacoemulsification in eyes with occludable angles and compare the results with those in eyes with normal open angles. SETTING:Eye Clinic, Ipoh General Hospital, Ipoh, Perak, Malaysia. METHODS:Patients with nonglaucomatou...
journal_title：Journal of cataract and refractive surgery
pub_type： 杂志文章
doi：10.1016/j.jcrs.2010.02.024
更新日期：2010-08-01 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
abstract：PURPOSE:To find the conditions that prevent posterior capsule opacification through in vitro analysis of the relationship between intraocular lens (IOL) optic configuration and lens epithelial cell (LEC) migration. SETTING:Division of Morphogenesis, Department of Developmental Biology, National Institute for Basic Bio...
journal_title：Journal of cataract and refractive surgery
pub_type： 杂志文章
doi：10.1016/s0886-3350(97)80245-3
更新日期：1997-07-01 00:00:00
abstract：PURPOSE:To evaluate forward light scattering and straylight in single-piece hydrophobic acrylic intraocular lenses (IOLs) (Acrysof) removed from cadaver eyes and design- and power-matched controls, as well as the effect of subsurface nanoglistenings on other optical quality and performance indicators. SETTING:John A. ...
journal_title：Journal of cataract and refractive surgery
pub_type： 杂志文章
doi：10.1016/j.jcrs.2015.07.043
更新日期：2016-01-01 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：UNLABELLED:A nationwide postal survey of all consultant ophthalmologists in the United Kingdom was conducted to determine attitudes and techniques of cataract surgery trainers, identify trainer-related factors that determine surgical opportunity, and ascertain whether trainers had received adequate training in how to t...
journal_title：Journal of cataract and refractive surgery
pub_type： 杂志文章
doi：10.1016/j.jcrs.2011.12.024
更新日期：2012-03-01 00:00:00
abstract：:To compare the effect of a fixed dorzolamide-timolol combination with that of latanoprost on intraocular pressure (IOP) after small incision cataract surgery. Department of Ophthalmology, University of Vienna, Vienna, Austria. This prospective randomized study comprised 60 eyes of 30 patients scheduled for small incis...
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(00)00706-9
更新日期：2001-05-01 00:00:00
