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Toric lens

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https://www.readbyqxmd.com/read/29675386/comparison-of-myopia-control-between-toric-and-spherical-periphery-design-orthokeratology-in-myopic-children-with-moderate-to-high-corneal-astigmatism
#1
Yu Zhang, Yue-Guo Chen
AIM: To compare clinical results between toric and spherical periphery design orthokeratology (ortho-k) in myopic children with moderate-to-high corneal astigmatism. METHODS: This retrospective study enrolled 62 eyes of 62 subjects using toric ortho-k lenses. These subjects were assigned to the toric group. Based on the one-to-one match principle (same age, proximate spherical equivalence and corneal astigmatism), 62 eyes of 62 subjects were enrolled and included in the spherical group...
2018: International Journal of Ophthalmology
https://www.readbyqxmd.com/read/29667423/suturing-technique-for-scleral-fixation-of-toric-intraocular-lens-in-the-traumatic-aphakic-eye-with-corneal-astigmatism
#2
Qintuo Pan, Zhengwei Yang, Xiaomeng Chen, Wenlong Wei, Zhisheng Ke, Ding Chen, Fang Huang, Junyong Cai, Zhenquan Zhao
PURPOSE: To describe the clinical outcomes of traumatic aphakic eyes with corneal astigmatism after using a novel technique for toric intraocular lens suture fixation. METHODS: In total, 12 eyes of 12 patients who underwent a new scleral suture fixation technique of one-piece toric intraocular lens (SN6AT series, Alcon Inc., TX, USA) were included in our retrospective study. Preoperative patient status, postoperative visual acuity and refractive outcomes, postoperative intraocular lens rotation, tilt, decentration, and complications were analyzed...
April 1, 2018: European Journal of Ophthalmology
https://www.readbyqxmd.com/read/29666120/true-rotational-stability-of-a-single-piece-hydrophobic-intraocular-lens
#3
Daniel Schartmüller, Sabine Schriefl, Luca Schwarzenbacher, Christina Leydolt, Rupert Menapace
BACKGROUND: To evaluate rotation and its influencing factors of an aspheric one-piece hydrophobic acrylic intraocular lens (IOL) Vivinex XY1 during 6 months after operation. METHODS: In this institutional trial, 122 eyes of 66 patients were implanted with a non-toric aspheric IOL Vivinex XY1 (Hoya Corporation, Tokyo, Japan). IOL alignment was assessed at the end of surgery, 1 hour, 1 week, 1 month and 6 months after implantation. Confounding factors such as axial length, presence of anterior fibrosis and randomised implantation in four different intended axes (0°, 45°, 90°, 135°) were evaluated...
April 17, 2018: British Journal of Ophthalmology
https://www.readbyqxmd.com/read/29644243/comparison-of-visual-refractive-and-aberration-measurements-of-intacs-versus-toric-icl-lens-implantation-a-four-year-follow-up
#4
Shahrokh Ramin, Azad Sangin Abadi, Farideh Doroodgar, Mehrdad Esmaeili, Faizollah Niazi, Sana Niazi, Cyrus Alinia, Yaser Golestani, Reza Taj Abadi
This study was performed to evaluate the visual, refractive, and aberration measurement results of 2 implants, including Intacs Intracorneal Ring Segments (ICRS) and phakic Toric Implantable Collamer Lens (TICL), in patients with moderate Keratoconus (KCN). In this retrospective cross-sectional study, 30 patients with KCN with a mean age of 29.83 years were included in 2 groups, including the Intacs Intracorneal Ring Segments (ICRS) group and the phakic Toric Implantable Collamer Lens (TICL) group. Preoperative data as well as 6-month, 1-, 2-, 3- and 4-year follow-up data after the operation were collected and analyzed with the SPSS software (ver...
2018: Medical Hypothesis, Discovery and Innovation in Ophthalmology
https://www.readbyqxmd.com/read/29582820/surgical-technique-for-management-of-isolated-lenticular-coloboma-with-high-corneal-astigmatism
#5
Simar Rajan Singh, Sonam Yangzes, Rohit Gupta, Jagat Ram
We describe a surgical technique for the correction of isolated congenital lenticular coloboma associated with high corneal astigmatism. Transscleral fixation of the capsular bag with a single eyelet Cionni capsular tension ring was followed by in-the-bag implantation of a toric intraocular lens (IOL). This lead to complete correction of the lenticular defect and perfect alignment of the toric lens. In this case, the child attained an unaided distance visual acuity of 20/30 following amblyopia therapy and a well-aligned toric IOL at 12 months of follow-up...
April 2018: Indian Journal of Ophthalmology
https://www.readbyqxmd.com/read/29572936/long-term-outcomes-of-posterior-chamber-phakic-intraocular-lens-implantation-in-keratoconus
#6
Seyed Javad Hashemian, Nahid Saiepoor, Leila Ghiasian, Hossein Aghai, Mohammad Ebrahim Jafari, Sayyed Pooya Alemzadeh, Mahsa Sadat Hashemian, Seyed Mahyar Hashemian
BACKGROUND: In this retrospective observational case series study, the aim was to evaluate the long-term safety, efficacy, stability and predictability of posterior chamber phakic intraocular lens (pIOL) implantation to correct myopia and myopic astigmatism associated with keratoconus. METHODS: Uncorrected distance visual acuity (UDVA), best spectacle-corrected distance visual acuity (BSCDVA), refraction and adverse effects were evaluated in 23 keratoconic eyes of 13 patients after five years with Visian ICMV4 pIOL (STAAR Surgical)...
March 23, 2018: Clinical & Experimental Optometry: Journal of the Australian Optometrical Association
https://www.readbyqxmd.com/read/29545950/comparison-of-two-toric-iol-calculation-methods
#7
C Kern, K Kortüm, M Müller, A Kampik, S Priglinger, W J Mayer
Purpose: To compare two calculators for toric intraocular lens (IOL) calculation and to evaluate the prediction of refractive outcome. Methods: Sixty-four eyes of forty-five patients underwent cataract surgery followed by implantation of a toric intraocular lens (Zeiss Torbi 709 M) calculated by a standard industry calculator using front keratometry values. Prediction error, median absolute error, and refractive astigmatism error were evaluated for the standard calculator...
2018: Journal of Ophthalmology
https://www.readbyqxmd.com/read/29545518/a-direct-method-for-determining-toricity-ratios-of-toric-intraocular-lens-calculators
#8
Lauren G Gabra, Samir I Sayegh
This study develops a method to determine toricity ratios used by arbitrary toric intraocular lens calculators. Access to this information allows for the improvement of refractive results. We derive the Sayegh-Gabra formula, which uses input and output parameters in a toric calculator to extract toricity ratios that are typically not disclosed. We illustrate the method on a number of commercial calculators. For each calculator, high, average, and low axial length values are crossed with high, average, and low mean corneal power values to generate a 3 × 3 matrix...
March 15, 2018: Scientific Reports
https://www.readbyqxmd.com/read/29527012/accuracy-of-intraocular-lens-power-calculation-using-three-optical-biometry-measurement-devices-the-oa-2000-lenstar-ls900-and-iolmaster-500
#9
Olga Reitblat, Adi Levy, Guy Kleinmann, Ehud I Assia
PURPOSE: To compare ocular measurements of three optical biometry devices and their application in intraocular lens (IOL) power calculations. METHODS: One hundred and forty eyes which had undergone cataract extraction surgery with preoperative biometry with OA--2000, IOLMaster-500, and Lenstar-LS900 were enrolled. Biometry measurements of the three devices were compared. The deviation of the postoperative refraction from the preoperative refractive target was calculated with different formulas (Barrett Universal II, Hoffer Q, Holladay I, and SRK/T)...
March 12, 2018: Eye
https://www.readbyqxmd.com/read/29525618/new-algorithm-for-toric-intraocular-lens-power-calculation-considering-the-posterior-corneal-astigmatism
#10
Carmen Canovas, Aixa Alarcon, Robert Rosén, Sanjeev Kasthurirangan, Joseph J K Ma, Douglas D Koch, Patricia Piers
PURPOSE: To assess the accuracy of toric intraocular lens (IOL) power calculations of a new algorithm that incorporates the effect of posterior corneal astigmatism (PCA). SETTING: Abbott Medical Optics, Inc., Groningen, the Netherlands. DESIGN: Retrospective case report. METHODS: In eyes implanted with toric IOLs, the exact vergence formula of the Tecnis toric calculator was used to predict refractive astigmatism from preoperative biometry, surgeon-estimated surgically induced astigmatism (SIA), and implanted IOL power, with and without including the new PCA algorithm...
March 7, 2018: Journal of Cataract and Refractive Surgery
https://www.readbyqxmd.com/read/29523441/visual-and-refractive-outcomes-in-manual-versus-femtosecond-laser-assisted-cataract-surgery-a-single-center-retrospective-cohort-analysis-of-1838-eyes
#11
Thomas A Berk, Matthew B Schlenker, Xavier Campos-Möller, Austin M Pereira, Iqbal Ike K Ahmed
PURPOSE: Femtosecond laser-assisted cataract surgery (FLACS) has emerged as an alternative to manual cataract surgery (MCS) for corneal incision and capsulorhexis creation, as well as nuclear fragmentation. This study compares postoperative refractive and visual outcomes in eyes receiving MCS or FLACS. DESIGN: Single-center, comparative, retrospective cohort analysis. PARTICIPANTS: Consecutive eyes receiving FLACS and MCS from July 1, 2012, to July 31, 2015, at a single tertiary care center...
March 6, 2018: Ophthalmology
https://www.readbyqxmd.com/read/29522223/evaluation-of-the-accuracy-of-two-marking-methods-and-the-novel-toricam-application-for-toric-intraocular-lens-alignment
#12
Andreas Pallas, Tun Kuan Yeo, Michelle Trevenen, Graham Barrett
PURPOSE: To compare the accuracy of two common reference marking methods for toric intraocular lens alignment before and after using the novel toriCAM application. METHODS: In this prospective, randomized study, 22 participants were randomly allocated to two groups, either freehand or slit-lamp-assisted marking. Corneal markings at 0° and 180° were made using either method. The toriCAM application on a smartphone was then used to assess the rotational alignment of these markings and compared to the actual alignment as measured by the Zaldivar calipers on the iTrace Topographer (Tracey Technologies, Houston, TX) as a reference...
March 1, 2018: Journal of Refractive Surgery
https://www.readbyqxmd.com/read/29496328/trends-in-contact-prescribing-in-japan-2003-2016
#13
Motohiro Itoi, Motozumi Itoi, Nathan Efron, Philip Morgan, Craig Woods
PURPOSE: To review contact lens prescribing trends in Japan between 2003 and 2016. METHODS: An annual survey of contact lens prescribing trends was conducted each year between 2003 and 2016. Japanese ophthalmologists were asked to provide information relating to ten consecutive contact lens fittings between January and March every year. RESULTS: Over the 14 years of the annual survey, data from a total of 64,122 contact lens fits were returned by ophthalmologists...
February 26, 2018: Contact Lens & Anterior Eye: the Journal of the British Contact Lens Association
https://www.readbyqxmd.com/read/29496327/the-influence-of-limbal-and-scleral-shape-on-scleral-lens-design
#14
REVIEW
Daddi Fadel
PURPOSE: To summarize the research findings on the ocular surface profile, to provide a definition and a classification of the corneoscleral shape, and to offer guidelines in selecting scleral lens design. METHODS: The definition of rotational symmetry and rotational asymmetry was inquired and PubMed searches were conducted. RESULTS: The better understanding of the scleral contact lens comportment on the eye and the introduction of new diagnostic instruments to measure the anterior ocular surface have led to improve comprehension of corneoscleral contour formulating new scleral lens designs...
February 26, 2018: Contact Lens & Anterior Eye: the Journal of the British Contact Lens Association
https://www.readbyqxmd.com/read/29480253/comparative-evaluation-of-rotational-stability-and-visual-outcome-of-toric-intraocular-lenses-with-and-without-a-capsular-tension-ring
#15
Anju Rastogi, Samreen Khanam, Yashpal Goel, Prolima Thacker, Prateek Kumar
Purpose: To evaluate the rotational stability of toric intraocular lens (IOL) when co-implanted with a capsular tension ring (CTR) as compared to that of a toric IOL without a CTR. Methods: This was a prospective randomized clinical trial performed in a tertiary care centre in India. Fifty adult human eyes with visually significant cataract and regular corneal astigmatism ≥1.5D divided into two groups of 25 eyes each, A and B by simple randomization. Eyes with corneal pathology, lens subluxation, and a specular endothelial cell count <2000/mm2 were excluded from the study...
March 2018: Indian Journal of Ophthalmology
https://www.readbyqxmd.com/read/29478226/reverse-pupillary-block-after-retinal-detachment-surgery-in-an-eye-with-toric-implantable-collamer-lens
#16
Tarannum Mansoori, Satish Gooty Agraharam
PURPOSE: To report an interesting phenomenon, after vitreoretinal surgery, in an eye with toric implantable collamer lens (ICL). METHODS: A 20-year-old male presented with raised intraocular pressure (IOP) after the retinal detachment surgery in the left eye. He had toric ICL in both the eyes, and left eye showed shallow peripheral anterior chamber depth (ACD), narrow iridocorneal angle (ICA), increased ICL vault and pigments debris blocking central hole. After dilation, peripheral ACD deepened, ICL vault decreased and ICA increased, with posterior bowing of iris...
February 24, 2018: International Ophthalmology
https://www.readbyqxmd.com/read/29426763/-toric-lens-implantation-in-cataract-surgery-automatic-versus-manual-horizontal-axis-marking-analysis-of-50%C3%A2-cases
#17
M Raucau, H El Chehab, E Agard, C Lagenaite, C Dot
SUBJECT: The main objective of our study is to evaluate the contribution of automated conjunctival recognition in the alignment of toric implants by comparing the automatic alignment optimized with Callisto™ to the manual marking of the horizontal axis. MATERIALS AND METHODS: We performed a prospective, descriptive, and monocentric study on patients undergoing cataract surgery with toric implantation (Asphina 709 Zeiss), operated by a surgeon with good experience in toricity, between September 2016 and March 2017...
February 6, 2018: Journal Français D'ophtalmologie
https://www.readbyqxmd.com/read/29426457/transscleral-fixation-of-a-toric-intraocular-lens-by-a-slipable-suture-technique
#18
Jong Hwa Jun, Seung Pil Bang
No abstract text is available yet for this article.
February 2018: Canadian Journal of Ophthalmology. Journal Canadien D'ophtalmologie
https://www.readbyqxmd.com/read/29425386/rotational-stability-of-monofocal-and-trifocal-intraocular-toric-lenses-with-identical-design-and-material-but-different-surface-treatment
#19
Kristof Vandekerckhove
PURPOSE: To compare the rotational stability, total misalignment, and visual and refractive outcomes achieved with a trifocal toric versus a monofocal toric intraocular lens (IOL). METHODS: In this prospective, interventional case series, eyes of patients consecutively scheduled for cataract surgery who had clinically relevant astigmatism were implanted with a FineVision Pod FT trifocal toric IOL or an Ankoris monofocal toric IOL (both PhysIOL SA, Liège, Belgium)...
February 1, 2018: Journal of Refractive Surgery
https://www.readbyqxmd.com/read/29422856/refractive-lens-exchange-with-multifocal-intraocular-lens-for-treatment-of-chronic-intermittent-spasm-of-the-near-reflex
#20
Guy Sallet
We report the case of an emmetropic 32-year-old female with decreased uncorrected visual acuity and diplopia due to intermittent episodes of spasm of the near reflex. Neurologic, general, and ophthalmic examination could not find an organic cause. Attempts at spontaneous recovery, psychogenic therapy, and cycloplegic therapy were unsuccessful and the symptoms persisted for almost 5 years, leading to psychogenic distress. Final treatment with refractive lens exchange and implantation of a toric trifocal intraocular lens resolved the spasm of the near reflex, resulting in an uncorrected distance and near visual acuity of 20/20...
September 2017: Case Reports in Ophthalmology
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