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https://www.readbyqxmd.com/read/28646441/safety-efficacy-and-refractive-outcomes-of-lasik-surgery-in-patients-aged-65-or-older
#1
Paloma López-Montemayor, Jorge E Valdez-García, Denise Loya-García, Julio C Hernandez-Camarena
PURPOSE: Report on the safety, efficiency and refractive outcomes of LASIK surgery in patients aged 65 or older. METHODS: This study includes a case series of patients ≥65 years that underwent corneal refractive surgery during the period June 2010 to June 2015 at Hospital Zambrano Hellion, Monterrey, Mexico. Inclusion criteria were normal topography, central corneal thickness >500 μm, preoperative manifest refraction spherical equivalent (MRSE) up to -8...
June 23, 2017: International Ophthalmology
https://www.readbyqxmd.com/read/28639087/haigis-and-srkt-formulae-accuracy-for-intentional-myopic-overcorrection
#2
Rodrigo Faeda Dalto, Miriam A Ferreira, Wilian Queiroz, Roberto Pinto Coelho, Jayter Silva Paula, Andre Messias
PURPOSE: To investigate the influence of preoperative biometric parameters on the accuracy of Haigis and SRKT formulae in predicting postoperative target refraction. METHODS: Retrospective analysis of 108 eyes (70 patients) underwent uneventful phacoemulsification surgery with implant of Alcon-SN60WF intraocular lens (IOL). Forty-five eyes were intentionally targeted to myopia (-0.75 to -1.25 dpt), while the others targeted between 0 and -0.75 dpt. Preoperative axial length and keratometry (K) were measured with optical biometry (LENSTAR-Haag-Streit)...
June 21, 2017: International Ophthalmology
https://www.readbyqxmd.com/read/28634928/comparison-of-formulas-and-methods-for-high-myopia-patients-requiring-intraocular-lens-powers-less-than-six-diopters
#3
Harry S Geggel
PURPOSE: To determine the best method to minimize postoperative hyperopia and achieve mild myopia in patients requiring low-powered (<6.00 D) MN60MA intraocular lenses (IOLs). METHODS: This retrospective non-comparative case series consists of 32 eyes (20 patients). Postoperative spherical equivalent (SE) refractions were compared using four methods: standard formulas with varying target refractions (Haigis -1.00 D, Hoffer Q -1.75 D, Holladay 1 -1.50 D and SRK/T -1...
June 20, 2017: International Ophthalmology
https://www.readbyqxmd.com/read/28632403/effect-of-amblyopia-treatment-on-choroidal-thickness-in-children-with-hyperopic-anisometropic-amblyopia
#4
Seray Aslan Bayhan, Hasan Ali Bayhan
PURPOSE: To evaluate choroidal thickness (CT) in the eyes of children with hyperopic anisometropic amblyopia and to assess changes in CT during amblyopia treatment using spectral-domain optical coherence tomography (SD-OCT). METHODS: This longitudinal study, initially enrolled 40 patients, aged 3-9 years with hyperopic anisometropic amblyopia. Patients underwent treatment with refractive correction alone for 16 weeks and if needed, with refractive correction and patching treatment thereafter (6 months)...
June 20, 2017: Current Eye Research
https://www.readbyqxmd.com/read/28625971/peripheral-leptochoroid-clinical-and-anatomical-findings
#5
Jasmine H Francis, Larissa A Habib, David H Abramson
BACKGROUND/AIMS: To investigate the clinical findings and anatomical characteristics of patients with a thinned peripheral choroid (leptochoroid) presenting with bilateral macular geographical hyperpigmented fundus and compare with matched controls. METHODS: A retrospective, observational case series of 44 eyes (24 patients): 22 study eyes (12 study patients) with clinical findings of leptochoroid (geographical hyperpigmented fundus centred in the macula) matched with 22 control eyes (12 control patients)...
June 16, 2017: British Journal of Ophthalmology
https://www.readbyqxmd.com/read/28617854/choroidal-thickness-in-school-children-the-gobi-desert-children-eye-study
#6
Dan Zhu, Yan Wang, Yan Fei Zheng, Da Yong Yang, Kai Guo, Xian Rong Yang, Xin Xia Jing, Ian Y Wong, Qi Sheng You, Yong Tao, Jost B Jonas
PURPOSE: To investigate choroidal thickness (CT) and its associations in children in a school-based study. METHODS: The cross-sectional school-based Gobi Desert Children Eye Study included 1565 out of 1911 (81.9%) eligible children from all schools in the oasis region of Ejina in the Gobi Desert. A detailed ophthalmic examination was performed, including spectral-domain optical coherence tomography with enhanced depth imaging for CT measurement. RESULTS: CT measurements were available for 1463 (93...
2017: PloS One
https://www.readbyqxmd.com/read/28600708/effect-of-refractive-status-on-valsalva-induced-anterior-segment-changes
#7
Necip Kara, Serhat Kenan
PURPOSE: To evaluate the effect of the Valsalva maneuver (VM) on anterior segment parameters and its association with refractive status. METHOD: In this prospective study, 120 eyes of 120 subjects were evaluated. Subjects were divided into three groups: myopic (n = 40 patients), hyperopic (n = 40 patients), and emmetropic (control group, n = 40 subjects). The anterior segment parameters, including keratometric, pachymetric, and anterior chamber parameters, were measured using the Sirius System (Costruzione Strumenti Oftalmici, Florence, Italy) before and during VM...
June 9, 2017: International Ophthalmology
https://www.readbyqxmd.com/read/28596085/brief-hyperopic-defocus-or-form-deprivation-have-different-effects-on-eye-growth-and-ocular-rhythms-depending-on-the-time-of-day-of-exposure
#8
Debora L Nickla, Kelsey Jordan, Jane Yang, Kristen Totonelly
It is generally accepted that myopic defocus is a more potent signal to the emmetropization system than hyperopic defocus: one hour per day of myopic defocus cancels out 11 h of hyperopic defocus. However, we have recently shown that the potency of brief episodes of myopic defocus at inhibiting eye growth depends on the time of day of exposure. We here ask if this will also be true of the responses to brief periods of hyperopic defocus: may integration of the signal depend on time of day? If so, are the rhythms in axial length and choroidal thickness altered? Hyperopic defocus: Birds had one eye exposed to hyperopic defocus by the wearing of -10D lenses for 2 or 6 h at one of 3 times of day for 5 days: Morning (7 a...
June 5, 2017: Experimental Eye Research
https://www.readbyqxmd.com/read/28589448/-laser-in-situ-keratomileusis-with-microkeratome-or-femtosecond-laser
#9
REVIEW
T Kohnen, G Steinwender
OBJECTIVE AND PRINCIPLES: In LASIK, after cutting a lamellating stromal corneal incision (flap) with a microkeratome or a femtosecond laser, the underlying tissue is treated with an excimer laser for refractive correction. The objective is to achieve independency from spectacles and contact lenses due to correction of ametropia. INDICATIONS: Surgery is indicated when the patient wishes to achieve independency from spectacles and contact lenses. For LASIK, the German Commission for Refractive Surgery defined a range of applicability for myopic correction up to -8 diopters (D), astigmatic correction up to 5 D and hyperopic correction up to +3 D...
June 6, 2017: Der Ophthalmologe: Zeitschrift der Deutschen Ophthalmologischen Gesellschaft
https://www.readbyqxmd.com/read/28586496/small-incision-lenticule-extraction-smile-for-hyperopia-optical-zone-diameter-and-spherical-aberration-induction
#10
Dan Z Reinstein, Kishore R Pradhan, Glenn I Carp, Timothy J Archer, Marine Gobbe, Walter Sekundo, Raynan Khan, Purushottam Dhungana
PURPOSE: To evaluate optical zone diameter efficacy and spherical aberration change in hyperopic small incision lenticule extraction (SMILE). METHODS: Prospective study of 60 consecutive hyperopic SMILE procedures using the VisuMax femtosecond laser (Carl Zeiss Meditec, Jena, Germany) and matched LASIK procedures with the VisuMax and MEL 80 excimer (Carl Zeiss Meditec) lasers. Inclusion criteria were maximum attempted hyperopic meridian of between +1.00 and +7.00 diopters (D)...
June 1, 2017: Journal of Refractive Surgery
https://www.readbyqxmd.com/read/28542088/corneal-breakthrough-haze-after-photorefractive-keratectomy-with-mitomycin-c-incidence-and-risk-factors
#11
Igor Kaiserman, Naʼava Sadi, Michael Mimouni, Tzahi Sela, Gur Munzer, Shmuel Levartovsky
PURPOSE: To identify preoperative and intraoperative factors affecting breakthrough corneal haze incidence after photorefractive keratectomy (PRK) with mitomycin C (MMC). METHODS: In this retrospective study of PRK performed at the Care Vision Refractive Laser Center, Tel Aviv, Israel, a total of 7535 eyes (n = 3854 patients; mean age ± SD, 26 ± 6 years; 55% men) underwent PRK with intraoperative MMC application. Patients with histories of corneal pathology or surgery were excluded...
May 23, 2017: Cornea
https://www.readbyqxmd.com/read/28540493/investigation-of-corneal-biomechanics-at-moderate-to-high-refractive-errors
#12
Nehir İnceoğlu, Sinan Emre, Mahmut Oğuz Ulusoy
PURPOSE: Corneal hysteresis (CH) and corneal resistance factor (CRF) are corneal biomechanical parameters which were measured by ocular response analyzer (ORA). Aim of this study was to define the CH and CRF in high myopic and hyperopic patients and compare the results with emmetropic control group. METHODS: A total of 193 eyes of 100 healthy volunteers were included. Study groups were high myopic patients (n = 27) with spherical refractive errors (SRE) of greater than -5...
May 24, 2017: International Ophthalmology
https://www.readbyqxmd.com/read/28540007/anterior-chamber-depth-change-following-cataract-surgery-in-pseudoexfoliation-syndrome-a-preliminary-study
#13
Mohammad Reza Fallah Tafti, Hossein Abdollah Beiki, S Farzad Mohammadi, Golshan Latifi, Elham Ashrafi, Zahra Fallah Tafti
PURPOSE: To assess the pseudophakic anterior chamber depth (PP-ACD) or effective lens position (ELP) change after cataract surgery in patients with pseudoexfoliation syndrome (PEX). METHODS: Consecutive eyes with PEX and cataract underwent standard phacoemulsification and were implanted with single-piece acrylic posterior chamber intraocular lenses (IOLs). Eyes with severe PEX and with axial length (AL) greater than 24 mm or less than 22 mm were not included. Eyes with capsular complication or unstable bags that needed capsular tension ring insertion were excluded...
April 2017: Journal of Ophthalmic & Vision Research
https://www.readbyqxmd.com/read/28532939/guiding-flying-spot-laser-transepithelial-phototherapeutic-keratectomy-with-optical-coherence-tomography
#14
REVIEW
Yan Li, Hideaki Yokogawa, Maolong Tang, Winston Chamberlain, Xinbo Zhang, David Huang
PURPOSE: To analyze transepithelial phototherapeutic keratectomy (PTK) results using optical coherence tomography (OCT) and develop a model to guide the laser dioptric and depth settings. SETTING: Casey Eye Institute, Portland, Oregon, USA. DESIGN: Prospective nonrandomized case series. METHODS: Patients with superficial corneal opacities and irregularities had transepithelial PTK with a flying-spot excimer laser by combining wide-zone myopic and hyperopic astigmatic ablations...
April 2017: Journal of Cataract and Refractive Surgery
https://www.readbyqxmd.com/read/28532936/intraoperative-aberrometry-versus-preoperative-biometry-for-intraocular-lens-power-selection-in-axial-myopia
#15
Darren C Hill, Shruti Sudhakar, Christopher S Hill, Tonya S King, Ingrid U Scott, Brett B Ernst, Seth M Pantanelli
PURPOSE: To compare the accuracy of intraoperative wavefront aberrometry (ORA) and the Hill-radial basis function (RBF) formula with other formulas based on preoperative biometry in predicting residual refractive error after cataract surgery in eyes with axial myopia. SETTING: Private practice, Harrisburg, Pennsylvania, USA. DESIGN: Retrospective consecutive case series. METHODS: Eyes with an axial length (AL) greater than 25...
April 2017: Journal of Cataract and Refractive Surgery
https://www.readbyqxmd.com/read/28524133/-wavefront-aberrations-and-accommodation-in-myopes-and-hyperopes
#16
V V Neroev, E P Tarutta, S G Arutyunyan, A T Khandzhyan, N V Khodzhabekyan
AIM: to comparatively investigate accommodation, pseudoaccommodation, and higher-order aberrations in children and young adults with myopia and hyperopia. MATERIAL AND METHODS: A total of 39 myopic (the mean error of (-)5.2±1.5 diopters) and 53 hyperopic (the mean error of (+)3.1±1.15 diopters) eyes of 46 patients aged 5-20 years (11.6±0.6 years on average) were enrolled. Examination included evaluation of the objective accommodative response, relative accommodation reserves, pseudoaccommodation volume (calculated as the difference between the (+)3...
2017: Vestnik Oftalmologii
https://www.readbyqxmd.com/read/28520882/ocular-determinants-of-refractive-error-and-its-age-and-sex-related-variations-in-the-chinese-american-eye-study
#17
Grace M Richter, Mingwu Wang, Xuejuan Jiang, Shuang Wu, Dandan Wang, Mina Torres, Farzana Choudhury, Rohit Varma
Importance: Uncorrected refractive error (RE) is a leading cause of visual impairment, and variations in ocular anatomy determine RE. The unique ocular determinants of RE in Chinese American individuals have not been studied previously. Objective: To report ocular determinants of RE in a Chinese American population 50 years and older in Monterey Park, California. Design, Setting, and Participants: The Chinese American Eye Study, a population-based, cross-sectional study, was conducted from February 1, 2010, through October 31, 2013, in Monterey Park, with this particular data analysis performed from January 1 through December 31, 2016...
May 18, 2017: JAMA Ophthalmology
https://www.readbyqxmd.com/read/28514829/does-hofstetter-s-equation-predict-the-real-amplitude-of-accommodation-in-children
#18
Hassan Hashemi, Payam Nabovati, Mehdi Khabazkhoob, Abbasali Yekta, Mohammad Hassan Emamian, Akbar Fotouhi
PURPOSE: The aim was to determine the distribution and associated factors of accommodative amplitude (AA) in six- to 12-year-old children and compare the results with those calculated using Hofstetter's formula. METHODS: In a cross-sectional study in 2015, random sampling was done from urban and rural populations of Shahroud, northern Iran. Participating schoolchildren were examined for manifest, cycloplegic and subjective refraction, as well as uncorrected vision and visual acuity...
May 17, 2017: Clinical & Experimental Optometry: Journal of the Australian Optometrical Association
https://www.readbyqxmd.com/read/28513498/combination-of-phototherapeutic-keratectomy-and-wavefront-guided-photorefractive-keratectomy-for-the-treatment-of-thiel-behnke-corneal-dystrophy
#19
Chia-Chieh Hsiao, Yu-Chih Hou
Phototherapeutic keratectomy (PTK) has been used to treat anterior corneal dystrophy but may cause hyperopic shift or corneal high-order aberration. We describe the successful treatment of a case of a 43-year-old female with Thiel-Behnke corneal dystrophy, using PTK followed by wavefront-guided photorefractive keratectomy (PRK). The patient had high corneal aberration and hyperopic shift after PTK in both eyes. The corneal surface regularity index and surface asymmetric index increased after PTK and decreased after wavefront-guided PRK...
April 2017: Indian Journal of Ophthalmology
https://www.readbyqxmd.com/read/28503812/the-difference-between-cycloplegic-and-non-cycloplegic-autorefraction-and-its-association-with-progression-of-refractive-error-in-beijing-urban-children
#20
Zhong Lin, Balamurali Vasudevan, Kenneth J Ciuffreda, Hong Jia Zhou, Guang Yun Mao, Ning Li Wang, Yuan Bo Liang
PURPOSE: To investigate the difference between cycloplegic and non-cycloplegic autorefraction and its association with the progression of refractive error in Beijing urban children. METHODS: A total of 386 children aged 6-17 years were enrolled in the baseline investigation of the Beijing Myopia Progression Study in 2010. They were invited for follow-up vision examinations in the years 2011, 2012, and 2013, including cycloplegic (cyclopentolate 1%, three times) autorefraction...
May 15, 2017: Ophthalmic & Physiological Optics: the Journal of the British College of Ophthalmic Opticians (Optometrists)
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