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https://www.readbyqxmd.com/read/28528120/objective-evaluation-of-corneal-and-lens-clarity-in-children-with-type-1-diabetes-mellitus
#1
Kemal Tekin, Merve Inanc, Erdal Kurnaz, Elvan Bayramoglu, Emre Aydemir, Mustafa Koc, Zehra Aycan
PURPOSE: To investigate whether abnormal glucose metabolism and duration of diabetes mellitus (DM) affected the corneal and lens clarity in children with well-controlled Type 1 DM and to compare the results obtained with those in healthy children. DESIGN: Cross-sectional prospective study. METHODS: This multicenter study enrolled 56 patients with DM and 51 control subjects. The duration of DM and the glycosylated hemoglobin (HbA1c) levels of the patients in the DM group were recorded...
May 17, 2017: American Journal of Ophthalmology
https://www.readbyqxmd.com/read/28513495/effect-of-post-crosslinking-haze-on-the-repeatability-of-scheimpflug-based-and-slit-scanning-imaging-devices
#2
Rohit Shetty, Aarti Agrawal, Rashmi Deshmukh, Luci Kaweri, Harsha L Rao, Harsha Nagaraja, Chaitra Jayadev
PURPOSE: The aim of this study was to analyze the effect of postcollagen crosslinking (CXL) haze on the measurement and repeatability of pachymetry and mean keratometry (Km) of four corneal topographers. MATERIALS AND METHODS: Sixty eyes of sixty patients with progressive keratoconus who had undergone accelerated CXL (ACXL) underwent imaging with a scanning slit imaging device (Orbscan II) and three Scheimpflug imaging devices (Pentacam HR, Sirius, and Galilei)...
April 2017: Indian Journal of Ophthalmology
https://www.readbyqxmd.com/read/28513492/repeatability-and-agreement-of-five-imaging-systems-for-measuring-anterior-segment-parameters-in-healthy-eyes
#3
Mukesh Kumar, Rohit Shetty, Chaitra Jayadev, Harsha L Rao, Debarun Dutta
PURPOSE: The purpose of this study is to assess the repeatability and agreement of five imaging devices, namely, the Pentacam (Oculus), Sirius (CSO), Orbscan IIz (Bausch and Lomb), Corvis (Oculus), and ultrasound pachymetry (UP, Tomey) in measuring steep keratometry (sKm), flat keratometry (fKm), central corneal thickness (CCT), thinnest corneal thickness (TCT), and anterior chamber depth (ACD) in healthy individuals. DESIGN: This was prospective, comparative study...
April 2017: Indian Journal of Ophthalmology
https://www.readbyqxmd.com/read/28503438/comparison-of-visual-effects-of-fs-lasik-for-myopia-centered-on-the-coaxially-sighted-corneal-light-reflex-or-the-line-of-sight
#4
Jing Zhang, Shi-Sheng Zhang, Qin Yu, Jing-Cai Lian
AIM: To compare visual quality after femtosecond laser in situ keratomileusis (FS-LASIK), between the coaxially sighted corneal light reflex (CSCLR) group and conventional ablation line of sight (LOS) group. METHODS: In total, 243 eyes (122 patients) were treated with centration on the CSCLR (visual axis) and 238 eyes (119 patients) treated with centration on the pupil center (LOS). Postoperative outcomes [uncorrected visual acuity (UCVA), best spectacle-corrected visual acuity (BSCVA)], safety index, efficacy index, refractive outcome, ablation center distance from the visual axis, corneal high-order aberrations, subjective discomfort glare and shadowing incidence rate, and contrast sensitivity at 1, 3, and 6mo were measured and compared...
2017: International Journal of Ophthalmology
https://www.readbyqxmd.com/read/28501441/repeatability-of-topographic-corneal-thickness-in-keratoconus-comparing-visante%C3%A2-oct-and-oculus-pentacam-hr-%C3%A2-topographer
#5
Heinz Otchere, Luigina Sorbara
PURPOSE: To assess the repeatability and reproducibility of Visante™ OCT and Oculus Pentacam HR® in measuring central (CCT) and topographic corneal thickness (TCT) along the principle meridians in keratoconus (KC) corneae. METHOD: Twenty participants diagnosed with KC were recruited. There were two study visits. On the first study visit, two repeated corneal thickness measurements were obtained with each instrument. Measurements were repeated at least 48hrs later in the same order...
May 10, 2017: Contact Lens & Anterior Eye: the Journal of the British Contact Lens Association
https://www.readbyqxmd.com/read/28497619/change-in-over-refraction-after-scleral-lens-settling-on-average-corneas
#6
Chelsea Bray, Stephanie Britton, Debby Yeung, Lacey Haines, Luigina Sorbara
PURPOSE: The purpose of this study was to determine the change in over-refraction, if any, after a scleral lens settled on the eye for 6-8 h. METHODS: Sixteen patients of varying refractive errors and normal corneal curvatures (measured with Pentacam(™) Oculus) were fitted with trial Mini-Scleral Design (MSD) scleral lenses (15.8 mm diameter) in one eye. The sagittal depths of the scleral lenses were selected by adding 350 μm to the corneal sagittal heights measured at a chord length of 15 mm with the Visante(™) optical coherence tomographer (OCT) anterior segment scans and picking the closest available trial lens in the set...
May 12, 2017: Ophthalmic & Physiological Optics: the Journal of the British College of Ophthalmic Opticians (Optometrists)
https://www.readbyqxmd.com/read/28486724/noncontact-quantification-of-topography-of-anterior-corneal-surface-and-bowman-s-layer-with-high-speed-oct
#7
Himanshu Matalia, Mathew Francis, Tarun Gangil, Rachana S Chandapura, Mathew Kurian, Rohit Shetty, Everette Jacob Remington Nelson, Abhijit Sinha Roy
PURPOSE: To quantify keratometry and wavefront aberration of the anterior corneal surface and epithelium-Bowman's layer interface using anterior segment optical coherence tomography (OCT). METHODS: Twenty-five normal eyes and 25 eyes with keratoconus were retrospectively analyzed. The anterior corneal edge and epithelium-Bowman's layer interface were segmented from 12 distortion-corrected OCT B-scans. Axial tangential curvatures and wavefront aberration were calculated by ray tracing and 6th order Zernike analyses...
May 1, 2017: Journal of Refractive Surgery
https://www.readbyqxmd.com/read/28481050/anisometropia-of-spherical-equivalent-and-astigmatism-among-myopes-a-23-year-follow-up-study-of-prevalence-and-changes-from-childhood-to-adulthood
#8
Olavi Pärssinen, Markku Kauppinen
PURPOSE: To study anisometropia of spherical equivalent and astigmatism from the onset of myopia at school age to adulthood. METHODS: A total of 240 myopic schoolchildren (mean age 10.9 years), with no previous spectacles, were recruited during 1983-1984 to a randomized 3-year clinical trial of bifocal treatment of myopia. Examinations with subjective cyclopedic refraction were repeated 3 years later (follow-up 1) for 238 subjects and thereafter at the mean ages of 23...
May 8, 2017: Acta Ophthalmologica
https://www.readbyqxmd.com/read/28463890/estimating-total-corneal-astigmatism-from-anterior-corneal-data
#9
Kristian Næser, Giacomo Savini, Jesper Flethøj Bregnhøj
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...
May 1, 2017: Cornea
https://www.readbyqxmd.com/read/28450380/in-vivo-confocal-microscopy-and-tear-cytokine-analysis-in-post-lasik-ectasia
#10
Natasha Kishore Pahuja, Rohit Shetty, Rashmi Deshmukh, Anupam Sharma, Rudy M M A Nuijts, Vishal Jhanji, Swaminathan Sethu, Arkasubhra Ghosh
AIM: Corneal keratectasia is one of the complications associated with laser in situ keratomileusis (LASIK) that results in vision impairment. The pathogenesis of post-LASIK ectasia (PLE) remains underexplored. We report the tear cytokine profile and in vivo confocal microscopy (IVCM) findings in eyes with PLE. METHODS: This retrospective study included age-matched 7 (14 eyes) post-LASIK controls (PLCs) and 6 (12 eyes) PLE subjects. Corneal topography was used to categorise the subjects into PLC and PLE groups...
April 27, 2017: British Journal of Ophthalmology
https://www.readbyqxmd.com/read/28437274/axial-length-and-anterior-segment-alterations-in-former-preterm-infants-and-full-term-neonates-analyzed-with-scheimpflug-imaging
#11
Achim Fieß, Ruth Kölb-Keerl, Markus Knuf, Bernd Kirchhof, Christiane Blecha, Isabel Oberacher-Velten, Philipp S Muether, Jacqueline Bauer
PURPOSE: To compare the axial length and anterior segment alterations in preterm infants with and without retinopathy of prematurity with those of full-term infants. METHODS: The Wiesbaden Prematurity Study investigated 503 participants of former gestational age ≤32 weeks and gestational age ≥37 weeks now being aged 4 to 10 years. This study included 485 participants in the prospective controlled cross-sectional, hospital-based study with successful Pentacam Scheimpflug imaging...
April 21, 2017: Cornea
https://www.readbyqxmd.com/read/28432114/intereye-asymmetry-in-bilateral-keratoconus-keratoconus-suspect-and-normal-eyes-and-its-relationship-with-disease-severity
#12
Mohammad Naderan, Mohammad Taher Rajabi, Parviz Zarrinbakhsh
BACKGROUND/AIM: To describe the intereye asymmetry in patients with keratoconus (KC), keratoconus suspect (KCS) and normal participants, and to evaluate the relationship between asymmetry and disease severity. METHODS: In this prospective observational comparative study, 446 patients with bilateral KC, 68 patients with bilateral KCS and 306 normal participants underwent topographic, keratometric and pachymetric evaluations by Pentacam as well as refractive and visual acuity examinations...
April 21, 2017: British Journal of Ophthalmology
https://www.readbyqxmd.com/read/28412801/-preliminary-report-on-the-application-of-femtosecond-laser-assisted-anterior-capsulotomy-in-intumescent-white-cataract-surgery
#13
T T Peng, Y Wang, X Y Bao
Objective: To assess the effect of femtosecond laser-assisted anterior capsulotomy in intumescent white cataract surgery. Methods: Retrospective case series study. One hundred and fifty cataract patients (150 eyes) from June 2014 to June 2015 in Wuhan Aier ophthalmology hospital were enrolled in this study. They were divided into three groups: 50 intumescent white cataract patients (50 eyes) in the study group were performed femtosecond laser-assisted capsulotomy (LenSx system) operation selectively. Fifty intumescent white cataract patients (50 eyes) underwent normal manual continuous circular capsulorhexis as the control group 1...
April 11, 2017: [Zhonghua Yan Ke za Zhi] Chinese Journal of Ophthalmology
https://www.readbyqxmd.com/read/28412797/-correlation-between-axial-length-and-corneal-curvature-and-spherical-aberration
#14
X J Wang, Y Z Bao
Objective: To discuss the correlation between axial length and corneal curvature and corneal spherical aberration in a group of cataract patients with axial length greater than 24 mm. Methods: Retrospective case series. This study comprised 117 (234 eyes) age-related cataract patients. There were 51 men (43.59%) and 66 women (56.41%) with mean age of (69.0±8.7) years (range from 52.0 to 85.0 years). The average axial length was 27.6±1.8 (range from 24.2 to 31.9 mm). We devided them into four groups according to the axial length...
April 11, 2017: [Zhonghua Yan Ke za Zhi] Chinese Journal of Ophthalmology
https://www.readbyqxmd.com/read/28403194/calculations-of-actual-corneal-astigmatism-using-total-corneal-refractive-power-before-and-after-myopic-keratorefractive-surgery
#15
Kyoung Yul Seo, Hun Yang, Wook Kyum Kim, Sang Min Nam
PURPOSE: To calculate actual corneal astigmatism using the total corneal refractive astigmatism for the 4-mm apex zone of the Pentacam (TCRP4astig) and keratometric astigmatism (Kastig) before and after photorefractive keratectomy or laser in situ keratomileusis. METHODS: Uncomplicated 56 eyes after more than 6 months from the surgery were recruited by chart review. Various corneal astigmatisms were measured using the Pentacam and autokeratometer before and after surgery...
2017: PloS One
https://www.readbyqxmd.com/read/28396804/impact-of-treatment-decentration-on-higher-order-aberrations-after-smile
#16
Ying Yu, Wenwen Zhang, Xinliang Cheng, Jianru Cai, Hui Chen
Purpose. To evaluate decentration following femtosecond laser small incision lenticule extraction (SMILE) and sub-Bowman keratomileusis (SBK) and its impact on higher-order aberrations (HOAs). Methods. Prospective, nonrandom, and comparison study. There were 96 eyes of 52 patients who received SMILE and 96 eyes of 49 patients who received SBK in this study. Decentration was calculated 6 months after surgery with Pentacam. HOAs and visual acuity after the surgery were examined for patients in both groups before and 6 months after surgery...
2017: Journal of Ophthalmology
https://www.readbyqxmd.com/read/28396803/corneal-clarity-and-visual-outcomes-after-small-incision-lenticule-extraction-and-comparison-to-femtosecond-laser-assisted-in-situ-keratomileusis
#17
Apostolos Lazaridis, Konstantinos Droutsas, Walter Sekundo, Michael Petrak, Stephan Schulze
Purpose. To evaluate corneal clarity and visual outcomes after small-incision lenticule extraction (SMILE) and compare them to femtosecond laser-assisted in situ keratomileusis (FS-LASIK). Materials and Methods. Fifty-eight myopic eyes of 33 patients who underwent SMILE were compared to 58 eyes of 33 patients treated with FS-LASIK. All procedures were performed using VisuMax® femtosecond laser and MEL 80® excimer laser (Carl Zeiss Meditec AG, Germany). Pentacam™ (Oculus, Germany) was used for pre- and 3-month postoperative corneal densitometry (CD) analysis...
2017: Journal of Ophthalmology
https://www.readbyqxmd.com/read/28379654/corneal-collagen-crosslinking-for-post-lasik-ectasia-an-australian-study
#18
Jessica Y Tong, Deepa Viswanathan, Christopher Hodge, Gerard Sutton, Colin Chan, John J Males
PURPOSE: Post laser-assisted in situ keratomileusis (LASIK) ectasia is a rare and unpredictable complication after LASIK. Corneal collagen crosslinking (CXL) has emerged as a promising technique to address this complication. Our study evaluates the long-term efficacy of CXL for post-LASIK ectasia in an Australian setting. DESIGN: Retrospective review of post-LASIK ectasia patients referred to and treated at 3 corneal refractive surgery institutions in Sydney, Australia...
March 29, 2017: Asia-Pacific Journal of Ophthalmology
https://www.readbyqxmd.com/read/28368992/validation-of-an-objective-keratoconus-detection-system-implemented-in-a-scheimpflug-tomographer-and-comparison-with-other-methods
#19
Irene Ruiz Hidalgo, Jos J Rozema, Alain Saad, Damien Gatinel, Pablo Rodriguez, Nadia Zakaria, Carina Koppen
PURPOSE: To validate a recently developed program for automatic and objective keratoconus detection (Keratoconus Assistant [KA]) by applying it to a new population and comparing it with other methods described in the literature. METHODS: KA uses machine learning and 25 Pentacam-derived parameters to classify eyes into subgroups, such as keratoconus, keratoconus suspect, postrefractive surgery, and normal eyes. To validate this program, it was applied to 131 eyes diagnosed separately by experienced corneal specialists from 2 different centers (Fondation Rothschild, Paris, and Antwerp University Hospital [UZA])...
June 2017: Cornea
https://www.readbyqxmd.com/read/28367522/corneal-thickness-measurements-with-scheimpflug-and-slit%C3%A2-scanning%C3%A2-imaging-techniques-in-keratoconus
#20
Mohammad Aghazadeh Amiri, Hassan Hashemi, Shahroukh Ramin, Abbasali Yekta, Azadeh Taheri, Payam Nabovati, Mehdi Khabazkhoob
PURPOSE: To determine the repeatability of corneal thickness measurements with Scheimpflug (Pentacam) and slit scanning (Orbscan) imaging techniques in different grades of keratoconus. METHODS: This study was conducted as a cross-sectional research. Imaging with Orbscan and Pentacam was performed on patients with different grades of keratoconus. With each device, 3 measurements were taken at 10 min intervals. Repeatability indices in different grades of keratoconus were calculated for each device...
March 2017: Journal of Current Ophthalmology
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