Estimating Total Corneal Astigmatism From Anterior Corneal Data.

Abstract:

PURPOSE:To determine keratometric astigmatism (KA), posterior corneal astigmatism (PCA), and total corneal astigmatism (TCA) in 951 normal eyes, to establish a model for estimating TCA from anterior corneal data, and to test this method in a new group of eyes with toric intraocular lenses (TIOLs). METHODS:We used a Pentacam HR (high-resolution) Scheimpflug camera to determine KA, PCA, and TCA in 951 normal eyes. A model to estimate TCA from anterior corneal data was evaluated by the difference (=error) between the measured TCA and the estimated value. The model was tested in 40 eyes with TIOLs. RESULTS:KA, TCA, and PCA averaged 1.06 (±0.85) D, 1.05 (±0.83) D, and 0.33 (±0.17) D. The error of the model to estimate TCA averaged zero with an SD of ±0.21 D. Application of this model and of direct Pentacam TCA measurements in TIOL calculation gave similar results, namely a slight reduction of overcorrection in with-the-rule astigmatism, but an eradication of undercorrection in against-the-rule astigmatism. CONCLUSIONS:It was possible to estimate TCA accurately from anterior corneal data with a new formula. However, application of both this model on keratometric data and of direct Pentacam measurements in a group of 40 eyes with TIOLs did not completely eradicate the refractive error in TIOL calculation. More studies comparing Pentacam TCA and refractive astigmatism are required.

journal_name

Cornea

journal_title

Cornea

authors

Næser K,Savini G,Bregnhøj JF

doi

10.1097/ICO.0000000000001224

subject

Has Abstract

pub_date

2017-07-01 00:00:00

pages

828-833

issue

7

eissn

0277-3740

issn

1536-4798

journal_volume

36

pub_type

杂志文章

相关文献

CORNEA文献大全
  • Incidence and clinical characteristics of enterococcus keratitis.

    abstract:PURPOSE:To study the incidence, clinically relevant factors, and antibiotic sensitivity profile of cases of enterococcal keratitis presenting at the New York Eye and Ear Infirmary between January 1, 1996, and December 31, 2005. METHODS:The records of all corneal cultures submitted to the Microbiology Laboratory of the...

    journal_title:Cornea

    pub_type: 杂志文章

    doi:10.1097/ICO.0b013e31816f633b

    authors: Rau G,Seedor JA,Shah MK,Ritterband DC,Koplin RS

    更新日期:2008-09-01 00:00:00

  • Functional Morphology of the Lipid Layer of the Tear Film.

    abstract::Meibomian glands secrete the oily layer of the tear film, which prevents excessive evaporation of tear fluid. Dysfunction of meibomian glands is not only one of the causes of evaporative dry eye but also one of the main causes of entire dry eye. To understand the pathophysiology of meibomian gland dysfunction, it is i...

    journal_title:Cornea

    pub_type: 杂志文章,评审

    doi:10.1097/ICO.0000000000001367

    authors: Arita R,Fukuoka S,Morishige N

    更新日期:2017-11-01 00:00:00

  • Localized amyloidosis of the cornea secondary to trichiasis: clinical course and pathogenesis.

    abstract:PURPOSE:To present four cases of localized corneal amyloidosis secondary to trichiasis and to discuss its pathogenesis. METHODS:Medical and pathologic records of four patients with corneal amyloidosis secondary to trichiasis were reviewed retrospectively. Two patients underwent trichiasis surgery and then lamellar ker...

    journal_title:Cornea

    pub_type: 杂志文章,评审

    doi:10.1097/00003226-200307000-00020

    authors: Lin PY,Kao SC,Hsueh KF,Chen WY,Lee SM,Lee FL,Shiuh WM

    更新日期:2003-07-01 00:00:00

  • Cell-based approach for treatment of corneal endothelial dysfunction.

    abstract::Decompensation of the corneal endothelium causes severe visual impairments that lead to blindness. Although corneal transplantation is a well-known effective therapy for corneal endothelial dysfunction, many patients are not afforded that therapeutic opportunity owing to the worldwide shortage of donor corneas. Thus, ...

    journal_title:Cornea

    pub_type: 杂志文章,评审

    doi:10.1097/ICO.0000000000000229

    authors: Okumura N,Kinoshita S,Koizumi N

    更新日期:2014-11-01 00:00:00

  • Anatomical Changes in the Anterior Chamber Volume After Descemet Membrane Endothelial Keratoplasty.

    abstract:PURPOSE:To evaluate changes in the anterior chamber of eyes that have undergone Descemet membrane endothelial keratoplasty (DMEK) and to identify factors that affect these changes. METHODS:This retrospective study included 25 pseudophakic eyes of 25 patients who underwent DMEK. We determined the preoperative and posto...

    journal_title:Cornea

    pub_type: 杂志文章

    doi:10.1097/ICO.0000000000002535

    authors: Onouchi H,Hayashi T,Shimizu T,Matsuzawa A,Suzuki Y,Kato N

    更新日期:2020-09-29 00:00:00

  • Corneal ulceration and perforation with ketorolac tromethamine (Acular) use after PRK.

    abstract:PURPOSE:To report a case of corneal ulceration and perforation after PRK connected with high doses of ketorolac tromethamine (Acula). METHODS:A 31-year-old man presented 5 days after PRK in the left eye with corneal ulceration and perforation requiring penetrating keratoplasty. The patient admitted to using Acular eve...

    journal_title:Cornea

    pub_type: 杂志文章

    doi:10.1097/01.ico.0000179931.05275.dd

    authors: Mian SI,Gupta A,Pineda R 2nd

    更新日期:2006-02-01 00:00:00

  • Combination topical therapy for conjunctival primary acquired melanosis with atypia and periocular lentigo maligna.

    abstract:PURPOSE:To report the case of a patient who initially presented with primary acquired melanosis (PAM) without atypia of the conjunctiva and later developed lentigo maligna of the eyelids and PAM with atypia of the conjunctiva. We illustrate the utility of combination topical therapy with adjunctive cryotherapy to treat...

    journal_title:Cornea

    pub_type: 杂志文章

    doi:10.1097/ICO.0000000000000277

    authors: Bratton EM,Knutsen-Larson S,Durairaj VD,Gregory DG,Mellette JR

    更新日期:2015-01-01 00:00:00

  • Evaluation of Anterior and Posterior Corneal Irregularity After Descemet Membrane Endothelial Keratoplasty.

    abstract:PURPOSE:To investigate the changes in anterior and posterior corneal irregularity after Descemet membrane endothelial keratoplasty (DMEK). METHODS:This retrospective study included 27 eyes of 23 patients who underwent DMEK and 27 eyes of age-matched healthy controls. Corneal irregularity indexes, surface regularity of...

    journal_title:Cornea

    pub_type: 杂志文章

    doi:10.1097/ICO.0000000000001722

    authors: Oyakawa I,Hayashi T,Kobashigawa Y,Matsuzawa A,Takahashi H,Kato N

    更新日期:2018-11-01 00:00:00

  • Evaluation of corneal topography with Orbscan II in first-degree relatives of patients with keratoconus.

    abstract:PURPOSE:To evaluate the corneal topographic characteristics of first-degree relatives of patients with keratoconus with corneal topography to determine the incidence of clinical keratoconus and topographic abnormalities. METHODS:Between February and August 2006, Orbscan II analysis was done in 144 eyes of 72 cases who...

    journal_title:Cornea

    pub_type: 杂志文章

    doi:10.1097/ICO.0b013e318165d110

    authors: Kaya V,Utine CA,Altunsoy M,Oral D,Yilmaz OF

    更新日期:2008-06-01 00:00:00

  • Outcomes of Flap Lift Laser In Situ Keratomileusis Enhancements in a Large Patient Population: Does Application of a Bandage Contact Lens Affect Incidence of Epithelial Ingrowth?

    abstract:PURPOSE:To compare the incidence of corneal epithelial ingrowth (EIG) and the visual outcomes of enhancement with laser in situ keratomileusis (LASIK) by flap lift when a bandage soft contact lens (CL) was fitted after the procedure and when it was not. METHODS:This is a multicenter, retrospective, interventional case...

    journal_title:Cornea

    pub_type: 杂志文章,多中心研究

    doi:10.1097/ICO.0000000000002132

    authors: Ortega-Usobiaga J,Baviera-Sabater J,Llovet-Osuna F,González-López F,Bilbao-Calabuig R,Llovet-Rausell A,Beltrán-Sanz J

    更新日期:2019-12-01 00:00:00

  • Donor factors associated with epithelial defects after penetrating keratoplasty.

    abstract::The records of 39 patients undergoing 40 consecutive penetrating keratoplasties were reviewed to identify donor factors that might correlate with the presence of an epithelial defect on the first postoperative day. Of the 40 transplanted corneas, 13 (32.5%) had no epithelial defect, 18 (45%) had some epithelial defect...

    journal_title:Cornea

    pub_type: 杂志文章

    doi:

    authors: Kim T,Palay DA,Lynn M

    更新日期:1996-09-01 00:00:00

  • Intraoperative mitomycin C and corneal endothelium after pterygium surgery.

    abstract:PURPOSE:To determine the effect of mitomycin C (MMC) on the corneal endothelium after primary pterygium surgery. METHODS:This prospective, interventional, nonrandomized, observer-masked study included 46 consecutive patients (51 eyes) with primary pterygium. The bare sclera technique with 1-minute application of 0.02%...

    journal_title:Cornea

    pub_type: 杂志文章

    doi:10.1097/ICO.0b013e3181a3c548

    authors: Pérez-Rico C,Benítez-Herreros J,Montes-Mollón MA,Germain F,Castro-Rebollo M,Gómez-SanGil Y,Paz-Moreno J,Teus MA

    更新日期:2009-12-01 00:00:00

  • Listeria monocytogenes sclerokeratitis: a case report and literature review.

    abstract:PURPOSE:To report a case of Listeria monocytogenes sclerokeratitis and to review the literature. METHODS:Case report. RESULTS:A 25-year-old non-contact lens-wearing male rugby player was referred with progressive infective sclerokeratitis unresponsive to topical antivirals and antibiotics. On examination, visual acui...

    journal_title:Cornea

    pub_type: 杂志文章

    doi:10.1097/ICO.0b013e31816c4078

    authors: Tay E,Rajan M,Tuft S

    更新日期:2008-09-01 00:00:00

  • Colchicine in tear fluid of treated patients with familial Mediterranean fever.

    abstract:PURPOSE:The study aimed to determine whether detectable concentrations of colchicine are present in the tear fluid of treated patients with familial Mediterranean fever (FMF) and thus demonstrate a possible route by which colchicine reaches the corneal surface. METHODS:Tear fluid samples (50-100 microL) were collected...

    journal_title:Cornea

    pub_type: 杂志文章

    doi:10.1097/00003226-200304000-00001

    authors: Leibovitch I,Alster Y,Scherrmann JM,Azmon B,Barequet IS,Livneh A,O'Brien TP,Lazar M,Loewenstein A

    更新日期:2003-04-01 00:00:00

  • Association Between Dyslipidemia and Dry Eye Syndrome Among the Korean Middle-Aged Population.

    abstract:PURPOSE:Dry eye syndrome (DES) is a common eye disease caused by tear deficiency or excessive tear evaporation. Because the tear film layers play a major role in the pathogenesis of the evaporative dry eye, some previous articles have suggested the possible mechanism of dyslipidemia and DES. However, the previous resul...

    journal_title:Cornea

    pub_type: 杂志文章

    doi:10.1097/ICO.0000000000002133

    authors: Choi HR,Lee JH,Lee HK,Song JS,Kim HC

    更新日期:2020-02-01 00:00:00

  • Ocular surface reconstruction in LOGIC syndrome by amniotic membrane transplantation.

    abstract:PURPOSE:To determine whether preserved amniotic membrane can be used to reconstruct the ocular surface after excision of the invading granulation material typical of LOGIC syndrome (laryngeal and ocular granulation tissue in children from the Indian subcontinent). METHODS:Granulation tissue was dissected and excised f...

    journal_title:Cornea

    pub_type: 杂志文章

    doi:10.1097/00003226-200110000-00016

    authors: Moore JE,Dua HS,Page AB,Irvine AD,Archer DB

    更新日期:2001-10-01 00:00:00

  • Prevalence of positive microbiology results from donor cornea tissue in different methods of corneal transplantation.

    abstract:PURPOSE:To evaluate the prevalence of positive microbiology results (culture and/or Gram stain) in donor cornea tissue with newer transplant methods and to assess if the results subsequently correlate with higher incidence of clinical infection. METHODS:A retrospective review of the microbiology records of 569 consecu...

    journal_title:Cornea

    pub_type: 杂志文章

    doi:10.1097/ICO.0b013e3182542368

    authors: Garg S,Said B,Farid M,Steinert RF

    更新日期:2013-02-01 00:00:00

  • New graft inserter for descemet stripping automated endothelial keratoplasty.

    abstract:PURPOSE:The aim of this study was to introduce a newly developed graft inserter for Descemet stripping automated endothelial keratoplasty, which can be readily used with 1 hand, and to examine endothelial cell loss (ECL) after graft insertion using this new inserter in an ex vivo rabbit model. METHODS:Rabbit corneal g...

    journal_title:Cornea

    pub_type: 杂志文章

    doi:10.1097/ICO.0000000000000073

    authors: Toyama T,Honda N,Usui T,Amano S

    更新日期:2014-04-01 00:00:00

  • Progressive nonulcerative paracentral keratolysis associated with elevated corneal metalloproteinases.

    abstract:PURPOSE:We report a patient with progressive idiopathic, nonulcerative, noninflammatory, avascular, bilateral, paracentral and peripheral corneal thinning monitored for 13 years. METHODS:Because of progressive corneal thinning, the patient underwent several surgical procedures, including an arcuate lamellar keratectom...

    journal_title:Cornea

    pub_type: 杂志文章

    doi:

    authors: Hagen KB,Waring GO 3rd,Johnson-Wint B

    更新日期:1997-07-01 00:00:00

  • In vivo corneal and conjunctival epithelial nuclear stain.

    abstract::Epithelium plays a very important structural and functional role in the cornea and conjunctiva. Evaluation of the epithelium is the first step in diagnosing many pathologic states. We have developed a new technique for the in vivo staining of nuclei of corneal and conjunctival epithelium in rabbits and guinea pigs. Se...

    journal_title:Cornea

    pub_type: 杂志文章

    doi:

    authors: Wander AH,Neumeister RD,Tschismadia I,Choromokos EA,Masukawa T

    更新日期:1985-01-01 00:00:00

  • Concurrent use of 5% natamycin and 2% econazole for the management of fungal keratitis.

    abstract:PURPOSE:To determine if concurrent use of 5% natamycin and 2% econazole offers greater benefits than monotherapy with 5% natamycin for the management of fungal keratitis. METHODS:Subjects presenting to the cornea service were treated with 5% natamycin and 2% econazole used concurrently. We compared the results with a ...

    journal_title:Cornea

    pub_type: 杂志文章

    doi:10.1097/01.ico.0000134193.64357.82

    authors: Prajna NV,Nirmalan PK,Mahalakshmi R,Lalitha P,Srinivasan M

    更新日期:2004-11-01 00:00:00

  • Comparison of 5% Sulfur Hexafluoride Versus 100% Air Tamponade in Descemet Membrane Endothelial Keratoplasty.

    abstract:PURPOSE:To compare the rebubbling rate and clinical outcomes of Descemet membrane endothelial keratoplasty (DMEK) with 5% sulfur hexafluoride (SF6) gas versus 100% air as a tamponade for graft attachment. METHODS:Retrospective, comparative, interventional case series including 368 consecutive pseudophakic eyes with Fu...

    journal_title:Cornea

    pub_type: 杂志文章

    doi:10.1097/ICO.0000000000001299

    authors: Ampazas P,Droutsas K,Giallouros E,Schroeder FM,Sekundo W

    更新日期:2017-10-01 00:00:00

  • Selective Endothelial Removal for Peters Anomaly.

    abstract:PURPOSE:Peters anomaly is the most common cause of congenital corneal opacities. Although conservative management is often ineffective except in mild cases, surgical intervention in the form of penetrating keratoplasty is fraught with unpredictability and often has unacceptable postoperative outcomes. As such, there is...

    journal_title:Cornea

    pub_type: 杂志文章,评审

    doi:10.1097/ICO.0000000000001472

    authors: Soh YQ,Mehta JS

    更新日期:2018-03-01 00:00:00

  • Scleral Pneumatonometry in Penetrating Keratoplasty: A Clinical Study.

    abstract:PURPOSE:To evaluate the reliability between pneumatonometry intraocular pressure (IOP) measurement in different scleral locations and corneal IOP in a penetrating keratoplasty (PK) setting. Our aim is to validate a method that can potentially be used for patients with keratoprostheses. METHODS:This is a prospective ob...

    journal_title:Cornea

    pub_type: 杂志文章

    doi:10.1097/ICO.0000000000001314

    authors: Magalhaes OA,Aldave AJ

    更新日期:2017-10-01 00:00:00

  • Femtosecond laser-assisted intracorneal biopolymer insertion for the symptomatic treatment of bullous keratopathy.

    abstract:PURPOSE:To describe a new minimally invasive surgical technique for the symptomatic management of bullous keratopathy in blind eyes. METHODS:Four patients with severe corneal edema due to endothelial decompensation and no visual function in the affected eye presented for the relief of their ocular symptoms (pain and t...

    journal_title:Cornea

    pub_type: 杂志文章

    doi:10.1097/ICO.0000000000000081

    authors: Kymionis GD,Diakonis VF,Kankariya VP,Plaka AD,Panagopoulou SI,Kontadakis GA,Grentzelos MA,Tsilimbaris MK,Pallikaris IG

    更新日期:2014-05-01 00:00:00

  • Impression cytology study of conjunctival epithelial phenotypes on the healing ocular surface after pterygium excision.

    abstract:PURPOSE:To compare the process of conjunctival epithelial regeneration after three types of pterygium excision procedures. METHODS:Thirty-eight patients (45 eyes) with primary pterygium were randomly assigned to a bare-sclera procedure (group 1, 15 eyes of 12 patients), bare-sclera with intraoperative mitomycin C (MMC...

    journal_title:Cornea

    pub_type: 临床试验,杂志文章,随机对照试验

    doi:10.1097/00003226-200104000-00002

    authors: Tseng SH,Chen YT,Cheng HC,Huang FC,Lee SC,Chen FK

    更新日期:2001-04-01 00:00:00

  • Hyaluronic acid-CD44 interaction mediates the adhesion of lymphocytes by amniotic membrane stroma.

    abstract:PURPOSE:To demonstrate the role of intrinsic hyaluronic acid (HA) in the entrapment of inflammatory cells by amniotic membrane (AM) in vitro. METHODS:HA concentration in AM was analyzed by the sandwich protein binding assay, and the approximate molecular weight was measured by gel filtration chromatography. To localiz...

    journal_title:Cornea

    pub_type: 杂志文章

    doi:10.1097/01.ico.0000133999.45262.83

    authors: Higa K,Shimmura S,Shimazaki J,Tsubota K

    更新日期:2005-03-01 00:00:00

  • Late microbial keratitis after corneal transplantation.

    abstract::Infectious keratitis after penetrating keratoplasty can be devastating to the survival of the graft and its visual outcome. From November 1989 to October 1994, we treated 41 episodes of late microbial keratitis among 354 consecutive penetrating keratoplasty patients and reviewed their medical records retrospectively. ...

    journal_title:Cornea

    pub_type: 杂志文章

    doi:

    authors: Tseng SH,Ling KC

    更新日期:1995-11-01 00:00:00

  • Histopathologic findings in explanted osteo-odontokeratoprosthesis.

    abstract:PURPOSE:To report the histologic findings in three explanted osteo-odontokeratoprosthesis (OOKP) laminae. METHODS:The osteodental lamina of patient 1 with linear IgA bullous dermatosis had to be explanted 15 months after OOKP surgery because of permanent leakage after the resorption of the inferior half of the bone/de...

    journal_title:Cornea

    pub_type: 杂志文章

    doi:10.1097/00003226-200205000-00013

    authors: Stoiber J,Csáky D,Schedle A,Ruckhofer J,Grabner G

    更新日期:2002-05-01 00:00:00

  • Acanthamoeba keratitis: a parasite on the rise.

    abstract:PURPOSE:To report a recent significant increase of the number of patients diagnosed with Acanthamoeba keratitis (AK) at Wills Eye Hospital between 2004 and 2005. To determine the risk factors, clinical characteristics, treatments, and outcomes of patients with AK. METHODS:Retrospective consecutive case series of 20 ey...

    journal_title:Cornea

    pub_type: 杂志文章

    doi:10.1097/ICO.0b013e31805b7e63

    authors: Thebpatiphat N,Hammersmith KM,Rocha FN,Rapuano CJ,Ayres BD,Laibson PR,Eagle RC Jr,Cohen EJ

    更新日期:2007-07-01 00:00:00