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https://www.readbyqxmd.com/read/29770644/comparative-efficacy-of-the-new-optical-biometer-on-intraocular-lens-power-calculation-al-scan-versus-iolmaster
#1
Ahnul Ha, Won Ryang Wee, Mee Kum Kim
PURPOSE: To evaluate the agreement in axial length (AL), keratometry, and anterior chamber depth measurements between AL-Scan and IOLMaster biometers and to compare the efficacy of the AL-Scan on intraocular lens (IOL) power calculations and refractive outcomes with those obtained by the IOLMaster. METHODS: Medical records of 48 eyes from 48 patients who underwent uneventful phacoemulsification and IOL insertion were retrospectively reviewed. One of the two types of monofocal aspheric IOLs were implanted (Tecnis ZCB00 [Tecnis, n = 34] or CT Asphina 509M [Asphina, n = 14])...
May 15, 2018: Korean Journal of Ophthalmology: KJO
https://www.readbyqxmd.com/read/29736407/investigating-the-impact-of-preoperative-corneal-astigmatism-orientation-on-the-postoperative-spherical-equivalent-refraction-following-intraocular-lens-implantation
#2
Richard N McNeely, Salissou Moutari, Eric Pazo, Jonathan E Moore
Background: To investigate the impact of the orientation of preoperative corneal astigmatism on achieving the postoperative target refraction following monofocal intraocular lens (IOL) implantation. Methods: This study enrolled 339 eyes who had uneventful cataract surgery or refractive lens exchange (RLE) with subsequent monofocal IOL implantation. Eyes were initially categorized dependent upon axial length and then on the orientation of preoperative anterior corneal astigmatism...
2018: Eye and Vision (London, England)
https://www.readbyqxmd.com/read/29721927/estimations-of-retinal-blue-light-irradiance-values-and-melatonin-suppression-indices-through-clear-and-yellow-tinted-intraocular-lenses
#3
Masaki Tanito, Ichiya Sano, Tsutomu Okuno, Yoshihisa Ishiba, Akihiro Ohira
Spectral transmittance values in the wavelength range of 300 to 800 nanometers were measured using a spectrophotometer for 18 intraocular lenses (IOLs) including clear (ZCB00) and yellow-tinted (ZCB00V, both from AMO Japan) IOLs with three different lens powers. Also measured were the blue-light irradiance (BLI) values, which might reflect retinal damage caused by sunlight, and the melatonin suppression indices (MSIs), which might reflect the nonvisual photoreception function, through these IOLs. The BLIs (in mWcm-2 ) calculated were 7...
2018: Advances in Experimental Medicine and Biology
https://www.readbyqxmd.com/read/29703290/quality-of-images-with-toric-intraocular-lenses
#4
Daniele Tognetto, Alberto Armando Perrotta, Francesco Bauci, Silvia Rinaldi, Manlio Antonuccio, Felice Andrea Pellegrino, Gianfranco Fenu, George Stamatelatos, Noel Alpins
PURPOSE: To objectively evaluate the image quality obtained with toric intraocular lenses (IOLs) when misaligned from the intended axis. SETTING: University Eye Clinic and the Department of Industrial and Information Engineering, University of Trieste, Trieste, Italy. DESIGN: Experimental study. METHODS: An experimental optoelectronic test bench was created. It consisted of a high-resolution monitor to project target images and an artificial eye...
March 2018: Journal of Cataract and Refractive Surgery
https://www.readbyqxmd.com/read/29700651/comparison-of-anterior-segment-parameters-and-axial-length-measurements-performed-on-a-scheimpflug-device-with-biometry-function-and-a-reference-optical-biometer
#5
Maria Muzyka-Woźniak, Adam Oleszko
PURPOSE: To compare measurements of axial length (AL), corneal curvature (K), anterior chamber depth (ACD) and white-to-white (WTW) distance on a new device combining Scheimpflug camera and partial coherence interferometry (Pentacam AXL) with a reference optical biometer (IOL Master 500). To evaluate differences between IOL power calculations based on the two biometers. METHODS: Ninety-seven eyes of 97 consecutive cataract or refractive lens exchange patients were examined preoperatively on IOL Master 500 and Pentacam AXL units...
April 26, 2018: International Ophthalmology
https://www.readbyqxmd.com/read/29700617/the-role-of-the-vitreous-body-in-effective-iol-positioning
#6
Joris Vander Mijnsbrugge, Jean-Francois Fils, Joyce Jansen, Minh-Tri Hua, Peter Stalmans
PURPOSE: To compare the effective lens position (ELP) after phaco surgery alone and after combined phacovitrectomy surgery. METHODS: Twenty patients who were scheduled for elective surgery in both eyes were included. In one eye, phacovitrectomy surgery was performed (without any tamponade), and in the fellow eye, only phaco surgery was performed using the same IOL type. Pre- and postoperative biometric measurements were performed using laser interference biometry...
April 26, 2018: Graefe's Archive for Clinical and Experimental Ophthalmology
https://www.readbyqxmd.com/read/29692478/a-clinical-study-to-evaluate-the-results-after-toric-intraocular-lens-implantation-in-cases-of-corneal-astigmatism
#7
P S Moulick, V K Mohindra, V S Gurunadh, Parth Patel, Sandeep Gupta, M A Khan
Backgroud: Modern day cataract surgery aims at a spectacle free vision which becomes difficult in cases with pre-operative astigmatism more than 1.5 D. Implantation of toric intra-ocular lenses (IOL) after phacoemulsification in such eyes is one of the ways to counteract this problem. Methods: Thirty eyes with pre-operative astigmatism between 1.5 D and 4.5 D were implanted with toric IOLs following uneventful phaco-emulsification. The estimation of the axis of implantation of this toric IOL included calculating the surgically induced astigmatism (SIA) of the surgeon...
April 2018: Medical Journal, Armed Forces India
https://www.readbyqxmd.com/read/29685742/-is-holladay-2-formula-acurate-enough-for-calculating-intraocular-lens-power-in-non-standard-eyes
#8
C Cordelette, C Arndt, J Vidal, M Afriat, E Durbant, C Brugniart, A Ducasse, F Favre, A Denoyer
PURPOSE: To evaluate the benefit of the Holladay 2 formula versus the 3rd generation formulae in calculating the IOL power in eyes with non-standard axial length or keratometry before cataract surgery. PATIENTS: Retrospectiv study from January to December 2015. The inclusion critaeria were axial length (AL) <22mm or >26mm, or average keratometry <42 D or >46 D, dividing the patients in 4 groups respectively. The 7 parameters required to calculate the Holladay 2 formula were collected...
April 2018: Journal Français D'ophtalmologie
https://www.readbyqxmd.com/read/29675379/photorefractive-keratectomy-after-cataract-surgery-in-uncommon-cases-long-term-results
#9
Anna Maria Roszkowska, Mario Urso, Giuseppe Alberto Signorino, Leopoldo Spadea, Pasquale Aragona
AIM: To evaluate the efficacy and safety of the excimer laser correction of the residual refractive errors after cataract extraction with intraocular lens (IOL) implantation in uncommon cases. METHODS: Totally 24 patients with high residual refractive error after cataract surgery with IOL implantation were examined. Twenty-two patients had a history of phacoemulsification and IOL implantation, and two had extra-capsular cataract extraction with IOL implantation...
2018: International Journal of Ophthalmology
https://www.readbyqxmd.com/read/29615113/intraocular-lens-power-calculation-for-the-equine-eye
#10
Ulrike Meister, Christiane Görig, Christopher J Murphy, Hubertus Haan, Bernhard Ohnesorge, Michael H Boevé
BACKGROUND: Phacoemulsification and intraocular lens (IOL) implantation during cataract surgery in horses occur with increasing frequency. To reduce the postoperative refractive error it is necessary to determine the proper IOL power. In the present study retinoscopy, keratometry and ultrasonographic biometry were performed on 98 healthy equine eyes from 49 horses. The refractive state, corneal curvature (keratometry) and the axial location of all optical interfaces (biometry) were measured...
April 3, 2018: BMC Veterinary Research
https://www.readbyqxmd.com/read/29607215/calculation-of-unknown-preoperative-k-readings-in-postrefractive-surgery-patients
#11
Nicola Rosa, Maddalena De Bernardo, Maria Borrelli
Purpose: To determine the unknown preoperative K readings (Kpre) to be used in history-based methods, for intraocular lens (IOL) power calculation in patients who have undergone myopic photorefractive keratectomy (PRK). Methods: A regression formula generated from the left eyes of 174 patients who had undergone PRK for myopia or for myopic astigmatism was compared with other methods in 168 right eyes. The Pearson index and paired t -test were utilized for statistical analysis...
2018: Journal of Ophthalmology
https://www.readbyqxmd.com/read/29605815/predictability-of-formulae-for-intraocular-lens-power-calculation-according-to-the-age-of-implantation-in-paediatric-cataract
#12
Byung Joo Lee, Sang-Mok Lee, Jeong Hun Kim, Young Suk Yu
AIMS: To analyse the predictability of diverse intraocular lens (IOL) power calculation formulae in paediatric patients with congenital cataract. METHODS: The medical records of patients who underwent cataract surgery and posterior chamber IOL implantation (in-the-bag) for congenital cataract before 17 years of age were reviewed retrospectively. Target refractions calculated by Sanders-Retzlaff-Kraff (SRK)/II, SRK/T and Hoffer-Q formulae were compared with the actual refraction...
March 31, 2018: British Journal of Ophthalmology
https://www.readbyqxmd.com/read/29566052/effect-of-chemical-interaction-between-oleic-acid-and-l-arginine-on-oral-perception-as-a-function-of-polymorphisms-of-cd36-and-obpiia-and-genetic-ability-to-taste-6-n-propylthiouracil
#13
Melania Melis, Mariano Mastinu, Massimiliano Arca, Roberto Crnjar, Iole Tomassini Barbarossa
Oral sensitivity to fats varies in individuals influencing nutritional status and health. Variations in oleic acid perception are associated with CD36 and odorant binding protein (OBPIIa) polymorphisms, and 6-n-propylthiouracil (PROP) sensitivity, which is mediated by TAS2R38 receptor. L-Arginine (L-Arg) supplementation was shown to modify the perception of the five taste qualities. Here we analyzed the effect of three concentrations (5, 10, 15 mmol/L) of L-Arg on oral perception of oleic acid in forty-six subjects classified for PROP taster status and genotyped for TAS2R38, CD36 and OBPIIa polymorphisms...
2018: PloS One
https://www.readbyqxmd.com/read/29564411/comparison-of-okulix-ray-tracing-software-with-srk-t-and-hoffer-q-formula-in-intraocular-lens-power-calculation
#14
Mohammad Ghoreyshi, Ahmadreza Khalilian, Mohammadreza Peyman, Mohaddeseh Mohammadinia, Alireza Peyman
Purpose: To compare the performance of OKULIX ray-tracing software with SRK-T and Hoffer Q formula in intraocular lens (IOL) power calculation in patients presenting with cataract. Methods: In this prospective study, 104 eyes of 104 patients with cataract who underwent phacoemulsification and IOL implantation were recruited. Three IOL brands were used and for all eyes, IOL power calculation was performed using SRK-T, Hoffer Q formula and also OKULIX ray-tracing software...
March 2018: Journal of Current Ophthalmology
https://www.readbyqxmd.com/read/29545950/comparison-of-two-toric-iol-calculation-methods
#15
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/29543854/comparison-of-axial-length-anterior-chamber-depth-and-intraocular-lens-power-between-iolmaster-and-ultrasound-in-normal-long-and-short-eyes
#16
Jing Dong, Yaqin Zhang, Haining Zhang, Zhijie Jia, Suhua Zhang, Xiaogang Wang
PURPOSE: To compare the axial length (AL), anterior chamber depth (ACD) and intraocular lens power (IOLP) of IOLMaster and Ultrasound in normal, long and short eyes. METHODS: Seventy-four normal eyes (≥ 22 mm and ≤ 25 mm), 74 long eyes (> 25 mm) and 78 short eyes (< 22 mm) underwent AL and ACD measurements with both devices in the order of IOLMaster followed by Ultrasound. The IOLP were calculated using a free online LADAS IOL formula calculator. RESULTS: The difference in AL and IOLP between IOLMaster and Ultrasound was statistically significant when all three groups were combined...
2018: PloS One
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
#17
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
#18
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...
February 2018: Journal of Cataract and Refractive Surgery
https://www.readbyqxmd.com/read/29514530/accuracy-of-the-fetal-cerebroplacental-ratio-for-the-detection-of-intrapartum-compromise-in-nonsmall-fetuses
#19
José Morales-Roselló, Asma Khalil, Victoria Fornés-Ferrer, Alfredo Perales-Marín
OBJECTIVE: To study the accuracy of the cerebroplacental ratio (CPR) for the detection of intrapartum fetal compromise (IFC) in fetuses growing over the 10th centile. METHODS: This was a prospective study of 569 nonsmall fetuses attending the day hospital unit of a tertiary hospital that underwent an ultrasound examination at 36-40 weeks, and were delivered within 4 weeks of examination. IFC was defined as a composite of abnormal intrapartum fetal heart rate or intrapartum fetal scalp pH <7...
March 21, 2018: Journal of Maternal-fetal & Neonatal Medicine
https://www.readbyqxmd.com/read/29502613/wang-koch-formula-for-optimization-of-intraocular-lens-power-calculation-evaluation-at-a-canadian-center
#20
Marko Popovic, Matthew B Schlenker, Xavier Campos-Möller, Austin Pereira, Iqbal Ike K Ahmed
PURPOSE: To externally validate the Wang-Koch method for optimization of intraocular lens (IOL) formulas. SETTING: TLC Laser Eye Centre, Mississauga, Ontario, Canada. DESIGN: Retrospective case series. METHODS: Consecutive cataract patients with an axial length (AL) of 25.0 mm or longer were recruited. The predicted postoperative spherical equivalents (SEs) calculated from the Holladay 1 formula were compared with the 3-week postoperative SEs to yield prediction errors for Wang-Koch adjusted and unadjusted ALs...
January 2018: Journal of Cataract and Refractive Surgery
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