keyword
MENU ▼
Read by QxMD icon Read
search

Toric lens

keyword
https://www.readbyqxmd.com/read/28991609/optimized-keratometry-and-total-corneal-astigmatism-for-toric-intraocular-lens-calculation
#1
Giacomo Savini, Kristian Næser, Domenico Schiano-Lomoriello, Pietro Ducoli
PURPOSE: To compare keratometric astigmatism (KA) and different modalities of measuring total corneal astigmatism (TCA) for toric intraocular lens (IOL) calculation and optimize corneal measurements to eliminate the residual refractive astigmatism. SETTING: G.B. Bietti Foundation IRCCS, Rome, Italy. DESIGN: Prospective case series. METHODS: Patients who had a toric IOL were enrolled. Preoperatively, a Scheimpflug camera (Pentacam HR) was used to measure TCA through ray tracing...
September 2017: Journal of Cataract and Refractive Surgery
https://www.readbyqxmd.com/read/28991336/four-stage-procedure-for-keratoconus-icrs-implantation-corneal-cross-linking-toric-phakic-intraocular-lens-implantation-and-topography-guided-photorefractive-keratectomy
#2
Efekan Coskunseven, Daya Papalkar Sharma, Michael A Grentzelos, Onurcan Sahin, George D Kymionis, Ioannis Pallikaris
PURPOSE: To evaluate a four-stage combined treatment for keratoconus including intrastromal corneal ring segment (ICRS) implantation followed by corneal cross-linking (CXL), toric phakic intraocular lens (IOL) implantation, and topography-guided photorefractive keratectomy (TG-PRK). METHODS: In this retrospective interventional case series, 11 eyes of 7 patients with progressive keratoconus were treated with a four-stage procedure including the following: Keraring ICRS (Mediphacos Ltda, Belo Horizonte, Brazil) implantation followed by CXL, phakic IOL implantation, and TG-PRK (minimum 6 months between each stage)...
October 1, 2017: Journal of Refractive Surgery
https://www.readbyqxmd.com/read/28988643/a-novel-fitting-algorithm-for-alignment-curve-radius-estimation-using-corneal-elevation-data-in-orthokeratology-lens-trial
#3
Lu Zhang, Yue Zhang, Yanlin Liu, Kai Wang, Mingwei Zhao
PURPOSE: To evaluate a novel fitting algorithm for estimation of alignment curve (AC) radius during orthokeratology lens trial. METHODS: Fifty myopic children were recruited in this study. AC radii were estimated by both traditional method using flat K readings and eccentricity values and by a novel fitting algorithm, which was composed of 256 circle fittings using corneal elevation data from the corresponding AC region and a succedent toric fitting based on these calculated AC curvatures...
October 4, 2017: Contact Lens & Anterior Eye: the Journal of the British Contact Lens Association
https://www.readbyqxmd.com/read/28961565/cataract-surgery-in-eyes-with-keratoconus-a-review-of-the-current-literature
#4
Majid Moshirfar, Brian D Walker, Orry C Birdsong
PURPOSE OF REVIEW: There are an increasing number of keratoconic eyes, requiring cataract surgery. We review the preoperative planning, intraoperative options, and postoperative management that aid in successful outcomes. RECENT FINDINGS: Management of keratoconic eyes requiring cataract surgery requires a multifaceted approach. Preoperatively, corneal crosslinking and intrastromal corneal ring segments can be considered in order to provide stable keratometry values for intraocular lens (IOL) calculations...
September 28, 2017: Current Opinion in Ophthalmology
https://www.readbyqxmd.com/read/28953492/descemet-membrane-endothelial-keratoplasty-in-eyes-with-previous-laser-refractive-surgery-outcomes-and-complications
#5
Dorian A Zeidenweber, Zachary M Mayko, Michael D Straiko, Mark A Terry
PURPOSE: To evaluate the refractive predictability and efficacy of Descemet membrane endothelial keratoplasty (DMEK) for patients with previous laser refractive surgery. METHODS: We retrospectively reviewed our cohort of endothelial keratoplasty surgical cases. We identified 21 eyes that underwent laser-assisted in situ keratomileusis (n = 17) or photorefractive keratectomy (n = 4) and were treated with DMEK for endothelial failure. Patients were analyzed preoperatively and at 6 months postoperatively for changes in visual acuity, refraction, and corneal topography...
September 27, 2017: Cornea
https://www.readbyqxmd.com/read/28945646/efficacy-of-toric-contact-lenses-in-fitting-and-patient-reported-outcomes-in-contact-lens-wearers
#6
Stephanie M Cox, David A Berntsen, Katherine M Bickle, Jessica H Mathew, Daniel R Powell, B Kim Little, Kathrine Osborn Lorenz, Jason J Nichols
OBJECTIVES: To assess whether patient-reported measures are improved with soft toric contact lenses (TCLs) compared with soft spherical contact lenses (SCLs) and whether clinical time needed to fit TCL is greater than SCL. METHODS: Habitual contact lens wearers with vertexed spherical refraction +4.00 to +0.25 D or -0.50 to -9.00 D and cylinder -0.75 to -1.75 DC were randomly assigned to be binocularly fitted into a TCL or SCL, and masked to treatment assignment...
September 21, 2017: Eye & Contact Lens
https://www.readbyqxmd.com/read/28945644/effects-of-contact-lens-wear-on-biometry-measurements-for-intraocular-lens-calculations
#7
Jay J Meyer, Michelle J Kim, Terry Kim
OBJECTIVES: To determine the effects of contact lens (CL) wear on biometry measurements for cataract surgery and whether a CL hiatus can reduce the prediction error of intraocular lens (IOL) calculations. METHODS: Retrospective, interventional case series of eyes that received repeat biometry measurements for IOL calculations after discontinuing hard or soft CLs for at least 14 days. PRIMARY OUTCOME MEASURES: intersession change in axial length, average keratometry, astigmatism, and axis...
September 21, 2017: Eye & Contact Lens
https://www.readbyqxmd.com/read/28932335/cataract-surgery-in-patients-with-keratoconus-pearls-and-pitfalls
#8
F Aiello, Q J Nasser, C Nucci, R I Angunawela, Z Gatzioufas, V Maurino
BACKGROUND: Keratoconus (KC) is a common ectatic disorder resulting in progressive corneal thinning and irregular astigmatism. It has been observed that patients affected by KC are more likely to develop lens opacities earlier compared to non-keratoconic patients. OBJECTIVE: Intraocular lens (IOL) selection and refractive outcome prediction are among a number of factors that can make cataract surgery in keratoconic patients challenging. Accurate biometry is often difficult to obtain due to unreliable K measurements and lack of dedicated biometric formulae...
2017: Open Ophthalmology Journal
https://www.readbyqxmd.com/read/28931181/-refractive-lens-exchange
#9
Fritz H Hengerer, Ina Conrad-Hengerer
In refractive surgery the removal of the natural lens followed by implantation of an artificial intraocular lens has been an established method to treat refractive errors. The term "clear lens exchange" separates this approach from cataract surgery, where a cloudy lens has to be removed. With regard to currently available intraocular lens technologies, there is a wide range to correct myopia, hyperopia as well as astigmatism. Trifocal or extended depth-of-focus lenses (EDOF) even with a toric component offer the patients a potential benefit to further address presbyopia, respectively...
October 2017: Klinische Monatsblätter Für Augenheilkunde
https://www.readbyqxmd.com/read/28924444/implantation-of-a-multifocal-toric-intraocular-lens-after-radial-keratotomy-and-cross-linking-with-hyperopia-and-astigmatism-residues-a-case-report
#10
Raffaele Nuzzi, Francesca Monteu, Federico Tridico
Radial keratotomy is a refractive surgical technique, widely used in the 80s and early 90s to correct myopia and astigmatism, but now overcome by more recent laser techniques. Important consequences, often in patients with more than 45 years of age, are progressive hyperopic shift and/or an increase in corneal astigmatism, whose main cause seems to be an increase in the curvature radius of the central portion of the cornea. This seems to be due to radial keratotomy incisions - with the consequent need for cross-linking - intraocular pressure, and corneal biomechanical parameters...
May 2017: Case Reports in Ophthalmology
https://www.readbyqxmd.com/read/28917397/evaluation-of-postoperative-toric-intraocular-lens-alignment-with-anterior-segment-optical-coherence-tomography
#11
Andrea Lucisano, Marco Ferrise, Marco Balestrieri, Massimo Busin, Vincenzo Scorcia
We describe the use of a simple tool to evaluate the postoperative alignment of toric intraocular lenses (IOLs). The entire anterior segment is scanned using anterior segment optical coherence tomography and analyzed with an internal dedicated tool. A topographic map is displayed along with an anterior segment image, including a linear axis marker centered on the corneal apex. The marker can be rotated until it is aligned with the line connecting the IOL marking dots, precisely reproducing the IOL astigmatic axis, which is measured in angle degrees...
August 2017: Journal of Cataract and Refractive Surgery
https://www.readbyqxmd.com/read/28880340/topography-guided-photorefractive-keratectomy-in-the-treatment-of-corneal-scarring
#12
Nir Sorkin, Adi Einan-Lifshitz, Tanguy Boutin, Mahmood Showail, Armand Borovik, Clara C Chan, David S Rootman
PURPOSE: To report the outcome of topography-guided photorefractive keratectomy (TG-PRK) in the treatment of patients with corneal scarring. METHODS: A retrospective, interventional case series including 6 eyes of 6 patients with corneal scarring and irregular astigmatism who underwent TG-PRK. The etiologies for scarring were: infectious corneal ulcers, foreign body trauma, LASIK flap buttonhole, and lamellar keratoplasties performed to correct corneal perforation secondary to corneal melting...
September 1, 2017: Journal of Refractive Surgery
https://www.readbyqxmd.com/read/28880336/toric-icl-implantation-after-sequential-intracorneal-ring-segments-implantation-and-corneal-cross-linking-in-keratoconus-2-year-follow-up
#13
Youssef Abdelmassih, Sylvain El-Khoury, Elias Chelala, Elise Slim, Carole G Cherfan, Elias Jarade
PURPOSE: To evaluate 6-month and 2-year safety and clinical outcomes of Visian toric Implantable Collamer Lens (toric ICL) (STAAR Surgical, Monrovia, CA) implantation for the treatment of residual refractive errors after sequential intracorneal ring segments (ICRS) insertion and cross-linking (CXL) in keratoconus. METHODS: This consecutive case series included the results of a three-step ICRS-CXL-toric ICL procedure in 16 eyes of 13 patients with moderate to severe keratoconus (stages II and III of Amsler-Krumeich classification)...
September 1, 2017: Journal of Refractive Surgery
https://www.readbyqxmd.com/read/28868034/correction-of-high-astigmatism-after-penetrating-keratoplasty-with-toric-multifocal-intraocular-lens-implantation
#14
Raffaele Nuzzi, Francesca Monteu
After penetrating keratoplasty (PK), high astigmatism is often induced, being frequently about 4-6 dpt. According to the entity and typology of astigmatism, different methods of correction can be used. Selective suture removal, relaxing incisions, wedge resections, compression sutures, photorefractive keratectomy, and laser-assisted in situ keratomileusis can reduce corneal astigmatism and ametropia, but meanwhile they can cause a reduction in the corneal integrity and cause an over- or undercorrection. In case of moderate-to-high regular astigmatisms, the authors propose a toric multifocal intraocular lens (IOL) implantation to preserve the corneal integrity (especially in PK after herpetic corneal leukoma keratitis)...
May 2017: Case Reports in Ophthalmology
https://www.readbyqxmd.com/read/28836956/comparison-of-astigmatism-prediction-error-taken-with-the-pentacam-measurements-baylor-nomogram-and-barrett-formula-for-toric-intraocular-lens-implantation
#15
Dae-Young Park, Dong Hui Lim, Sungsoon Hwang, Joo Hyun, Tae-Young Chung
BACKGROUND: To evaluate and compare the astigmatism prediction errors taken with the Pentacam measurements, Baylor nomogram, and Barrett formula for toric intraocular lens (IOL) implantation. METHODS: Phacoemulsification with toric Precizon IOL implantation was performed in 41 eyes with corneal astigmatism (range, 1 to 5 diopters (D)) determined by IOLMaster and SimK on Pentacam. Preoperative corneal astigmatism measurements were obtained from IOLMaster readings (IOLMaster, Baylor-IOLMaster, and Barrett-IOLMaster) and Pentacam readings (SimK, Baylor-SimK, Barrett-SimK, wavefront, true net power, total corneal refractive power, and vector derived by manual vector summation using corneal front and back astigmatism)...
August 24, 2017: BMC Ophthalmology
https://www.readbyqxmd.com/read/28832744/posterior-argentinean-flag-like-sign-during-primary-posterior-continuous-curvilinear-capsulorhexis
#16
Frederico França Marques, Daniela Mieira Villano Marques, Fabio Kenji Matsumoto
We describe a unique complication during primary posterior continuous curvilinear capsulorhexis (PCCC) in a patient with megalocornea scheduled for phacoemulsification with toric multifocal intraocular lens (IOL) implantation. After nucleus emulsification and cortex removal, the capsular bag was filled with cohesive viscoelastic in preparation for PCCC to achieve reverse optic capture of the IOL, thus ensuring stability. However, as soon as the initial puncture was made using a 27-gauge needle to start the capsulotomy, the posterior capsule opening extended peripherally from 0º-180º...
June 2017: Arquivos Brasileiros de Oftalmologia
https://www.readbyqxmd.com/read/28828390/comparison-between-toric-and-spherical-phakic-intraocular-lenses-combined-with-astigmatic-keratotomy-for-high-myopic-astigmatism
#17
Lin-Yan Zheng, Shuang-Qian Zhu, Yan-Feng Su, Hu-Yong Zou, Qin-Mei Wang, A-Yong Yu
BACKGROUND: To compare the outcomes of a toric phakic intraocular lens (PIOL) and a spherical PIOL combined with astigmatic keratotomy (AK) for the correction of high myopic astigmatism. METHODS: This study enrolled patients with high myopic astigmatism, including 30 eyes (22 patients) that received a toric PIOL implantation (TICL group), and 32 eyes (24 patients) that received combined AK and a spherical PIOL implantation (AK+ ICL group). The outcomes were compared between the two groups before surgery, and at the following time points after surgery: 1 week, 1, 3, 6 months, and 1, 2 years...
2017: Eye and Vision (London, England)
https://www.readbyqxmd.com/read/28801741/scleral-suture-fixation-technique-for-dislocated-plate-haptic-toric-iol
#18
Remzi Karadag, Bahar Gunes, Veysel Aykut, Halit Oguz, Ahmet Demirok
Purpose We describe a scleral suture fixation technique for dislocated plate haptic toric intraocular lens (IOL) implantation. Materials and methods A double-armed 10-0 straight polypropylene suture was passed into the eye from the sclera (2 mm away from the limbus). A suture needle was passed through the hole on the corner of the IOL and pulled out from the paracentesis with a 27-gauge needle. Afterward, the suture needle was reinserted from the same paracentesis and then removed from the eye with the help of a 27-gauge needle entering the eye from a nearby point to the first scleral entrance...
August 11, 2017: International Ophthalmology
https://www.readbyqxmd.com/read/28790805/bilateral-implantation-of-3-0-d-multifocal-toric-intraocular-lenses-results-of-a-us-food-and-drug-administration-clinical-trial
#19
Robert Lehmann, Satish Modi, Bret Fisher, Magda Michna, Michael Snyder
PURPOSE: The purpose of this study was to evaluate the clinical outcomes of apodized diffractive +3.0 D multifocal toric intraocular lens (IOL) implantations in subjects with preoperative corneal astigmatism. PATIENTS AND METHODS: This was a prospective cohort study conducted at 21 US sites. The study population consisted of 574 subjects, aged ≥21 years, with preoperative astigmatism 0.75-2.82 D, and potential postoperative visual acuity (VA) ≥0.2 logMAR, undergoing bilateral cataract removal by phacoemulsification...
2017: Clinical Ophthalmology
https://www.readbyqxmd.com/read/28774937/clinical-outcomes-after-implantation-of-a-toric-intraocular-lens-with-a-transitional-conic-toric-surface
#20
Bettina C Thomas, Ramin Khoramnia, Gerd U Auffarth, Mike P Holzer
PURPOSE: To evaluate the postoperative outcomes after implantation of a hydrophilic toric intraocular lens (tIOL) with a transitional conic toric surface in patients with astigmatism undergoing refractive lens exchange (RLE) or cataract surgery. METHODS: In this monocentric study, clinical outcomes following implantation of the hydrophilic Precizon toric IOL model 565 (Ophtec) were analysed. For intraoperative axis alignment, the Verion Image Guided System was used...
August 3, 2017: British Journal of Ophthalmology
keyword
keyword
61063
1
2
Fetch more papers »
Fetching more papers... Fetching...
Read by QxMD. Sign in or create an account to discover new knowledge that matter to you.
Remove bar
Read by QxMD icon Read
×

Search Tips

Use Boolean operators: AND/OR

diabetic AND foot
diabetes OR diabetic

Exclude a word using the 'minus' sign

Virchow -triad

Use Parentheses

water AND (cup OR glass)

Add an asterisk (*) at end of a word to include word stems

Neuro* will search for Neurology, Neuroscientist, Neurological, and so on

Use quotes to search for an exact phrase

"primary prevention of cancer"
(heart or cardiac or cardio*) AND arrest -"American Heart Association"