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https://www.readbyqxmd.com/read/28328727/strategies-for-deep-anterior-lamellar-keratoplasty-after-hydrops-in-keratoconus
#1
Matthias Fuest, Jodhbir S Mehta
Corneal hydrops affects approximately 2.5% of keratoconus (KC) cases, predominantly young males approximately 25 years of age with steep cones. Often, patients are left with a vision-reducing corneal scar frequently necessitating surgical treatment. Penetrating keratoplasty (PK) has worse survival outcomes in hydrops than in general KC cases. Deep anterior lamellar keratoplasty (DALK) is a nonpenetrating technique believed to achieve equal or better outcomes in visual acuity, graft survival, endothelial rejection rates, and endothelial cell survival in comparison with PK, while maintaining globe integrity and the patients' Descemet membrane (DM) and endothelium...
March 21, 2017: Eye & Contact Lens
https://www.readbyqxmd.com/read/28328726/clinical-outcomes-and-contact-lens-case-contamination-using-a-povidone-iodine-disinfection-system
#2
Jacqueline Tan, Ananya Datta, Katherine Wong, Mark D P Willcox, Ajay K Vijay
OBJECTIVE: To assess the incidence of adverse events during the use of a povidone-iodine disinfecting solution (cleadew) and the microbial contamination in contact lens cases. METHODS: A prospective, single-center, open-label, controlled study evaluating the use of cleadew cleaning and disinfecting system in existing daily wear soft contact lens wearers over a 3-month period was conducted. Ocular signs and symptoms during lens wear were assessed at baseline and after 1 and 3 months of using cleadew...
March 21, 2017: Eye & Contact Lens
https://www.readbyqxmd.com/read/28328725/region-specific-changes-in-postlens-fluid-reservoir-depth-beneath-small-diameter-scleral-lenses-over-2-hours
#3
Cherie B Nau, Muriel M Schornack
OBJECTIVES: Scleral lenses settle on the eye with time, and the depth of the postlens fluid reservoir decreases. We measured changes in central, superior, inferior, temporal, and nasal clearance beneath a small-diameter scleral lens after 2 hr of lens wear in healthy eyes. METHODS: Thirty-one participants (age, mean±SD, 29±7 years) with no history of eye disease or scleral lens wear were fitted with a 15-mm scleral lens in 1 eye. Scheimpflug images were acquired by a camera system within 5 min of lens placement and again after 2 hr of continuous lens wear...
March 21, 2017: Eye & Contact Lens
https://www.readbyqxmd.com/read/28328724/effects-of-corneal-scars-and-their-treatment-with-rigid-contact-lenses-on-quality-of-vision
#4
Bram de Jong, Ivanka J E van der Meulen, Johannes M J van Vliet, Ruth Lapid-Gortzak, Carla P Nieuwendaal, Thomas J T P van den Berg
OBJECTIVES: To study the effects of corneal scars and the treatment of these scars with rigid gas-permeable (RGP) contact lenses on quality of vision including straylight. Visual effects were related to scar characteristics such as size and grade. METHODS: Straylight and best-corrected visual acuity were measured in 23 patients with corneal scars during and after RGP contact lens wear. Contralateral eyes were used as controls, and age-normal values in case of bilateral scars...
March 21, 2017: Eye & Contact Lens
https://www.readbyqxmd.com/read/28244934/repeatability-of-central-corneal-thickness-measurement-using-rotating-scheimpflug-camera-in-dry-and-normal-eyes
#5
Jong-Hyuck Lee, Jae Hyuck Kim, Sun Woong Kim
PURPOSE: To compare the repeatability of central corneal thickness (CCT) measurement using the Pentacam between dry eyes and healthy eyes, as well as to investigate the effect of artificial tears on CCT measurement. METHODS: The corneal thicknesses of 34 patients with dry eye and 28 healthy subjects were measured using the Pentacam. One eye from each subject was assigned randomly to a repeatability test, wherein a single operator performed three successive CCT measurements time points-before and 5 min after instillation of one artificial teardrop...
February 27, 2017: Eye & Contact Lens
https://www.readbyqxmd.com/read/28244933/prospective-cohort-comparison-of-visual-acuity-and-contrast-sensitivity-between-femto-laser-in-situ-keratomileusis-and-orthokeratology-for-low-to-moderate-myopia
#6
Mingxia Tian, Ping Ma, Guoying Mu
PURPOSE: To compare the visual acuity and contrast sensitivity (CS) after femto laser in situ keratomileusis (fLASIK) and orthokeratology (OK) in patients with low-to-moderate myopia. METHODS: A total of 68 patients were enrolled in this prospective cohort study. Of these, 40 eyes from 40 patients with low-to-moderate myopia underwent fLASIK and 28 eyes from 28 patients underwent OK. In addition to uncorrected distance visual acuity and corrected distance visual acuity, photopic and mesopic CS (with CSV-1000E) were tested before treatment and at 1, 3, and 6 months after treatment...
February 27, 2017: Eye & Contact Lens
https://www.readbyqxmd.com/read/28244932/photopic-mesopic-and-scotopic-visual-acuity-after-18-mw-cm2-accelerated-corneal-cross-linking
#7
Soheila Asgari, Hassan Hashemi, Mohammad Miraftab, Saied Shahhoseini, Ebrahim Jafarzadhpur, Shiva Mehravaran, Akbar Fotouhi
OBJECTIVES: One-year changes in uncorrected (UDVA) and corrected (CDVA) distance visual acuity under different lighting conditions after accelerated cross-linking (CXL) in patients with progressive keratoconus in comparison with nontreated cases. METHODS: In this nonrandomized clinical trial, the sample included 50 eyes in the CXL group and 40 eyes in the control group. Visual acuity was tested under photopic (100 lux), mesopic (20 lux), and scotopic (0.5 lux) lighting conditions at 6 months and 1 year...
February 27, 2017: Eye & Contact Lens
https://www.readbyqxmd.com/read/28244931/estrogen-and-progesterone-induced-variation-in-corneal-parameters-according-to-hormonal-status
#8
Ayse Ebru Bahadir Kilavuzoglu, Cemile Banu Cosar, Ibrahim Bildirici, Omer Cetin, Esra Ozbasli
OBJECTIVES: To determine the effects of estrogen and progesterone on corneal thickness, curvature, and biomechanics in healthy corneas according to hormonal status. METHODS: The study included four groups of females: group A (menstruating, not pregnant, not lactating, and not menopausal; n=100), group B (pregnant; n=50), group C (lactating; n=50), and group D (menopausal; n=50). Group A was subdivided according to age, as subgroup A15-25 (age 15-25 years) and subgroup A>25 (age >25 years)...
February 27, 2017: Eye & Contact Lens
https://www.readbyqxmd.com/read/28198731/a-review-of-techniques-to-measure-protein-sorption-to-soft-contact-lenses
#9
Brad Hall, James A Forrest, Lyndon Jones
PURPOSE: To compare and critically evaluate a variety of techniques to measure the quantity and biological activity of protein sorption to contact lenses over short time periods. METHODS: A literature review was undertaken investigating the major techniques to measure protein sorption to soft contact lens materials, with specific reference to measuring protein directly on lenses using in situ, ex situ, protein structural, and biological activity techniques. RESULTS: The use of in situ techniques to measure protein quantity provides excellent sensitivity, but many are not directly applicable to contact lenses...
February 14, 2017: Eye & Contact Lens
https://www.readbyqxmd.com/read/28198730/conjunctival-impression-cytology-and-dry-eye-in-patients-with-ulcerative-colitis-a-pilot-study
#10
Pembe Oltulu, Refik Oltulu, Mehmet Asil, Gunhal Satirtav, Enver Mirza
PURPOSE: The aim of this study was to compare signs of dry eye between ulcerative colitis (UC) patients and healthy subjects. METHODS: Fifteen patients with UC (group 1) and 15 healthy subjects (group 2) were enrolled in this study. Tear volume measurement, Schirmer-I test with no anesthetic, tear break-up time, and conjunctival impression cytology (CIC) were evaluated in both groups. RESULTS: Patients with UC showed lower tear volumes when compared with healthy subjects (P<0...
February 14, 2017: Eye & Contact Lens
https://www.readbyqxmd.com/read/28134665/association-of-epithelial-atypia-with-recurrence-after-surgical-excision-in-conjunctival-papilloma
#11
Hiroyuki Yazu, Murat Dogru, Jun Miyauchi, Yoichi Tanaka, Takefumi Yamaguchi, Seika Den, Yoshiyuki Satake, Kazuo Tsubota, Jun Shimazaki
PURPOSE: To investigate the association between recurrence of conjunctival papillomas and presence of atypical epithelial changes in patients undergoing surgical excision for conjunctival papilloma. METHODS: We retrospectively reviewed 1,195 ophthalmic pathology specimens from 2004 to 2014 at Ichikawa General Hospital. Pathologic specimens of 5 patients with a final diagnosis of "conjunctival papilloma" were stained with hematoxylin-eosin, Ki 67, p53, human papillomavirus (HPV) 16 and 18 antibodies...
January 27, 2017: Eye & Contact Lens
https://www.readbyqxmd.com/read/28099285/comparison-of-silicone-hydrogel-and-hydrogel-daily-disposable-contact-lenses
#12
Jennie Diec, Daniel Tilia, Varghese Thomas
OBJECTIVE: To compare subjective, objective and safety performance of silicone hydrogel (SiHy) daily disposable (DD) with hydrogel (Hy) DD contact lenses. METHOD: Retrospective analysis on approximately 40 participants (Px) each in 5 trials. Lenses grouped into SiHy (delefilcon A, somofilcon A, narafilcon A) and Hy (omafilcon A, nelfilcon A). Participants attended follow-up visits at baseline, 2 weeks, 1 and 3 months. Subjective ratings (1-10 scale), adverse events (percentage of Px), physiological variables (0-4 scale), and wearing time were collected at each visit and compared between groups...
January 17, 2017: Eye & Contact Lens
https://www.readbyqxmd.com/read/28099284/the-presence-of-conjunctivochalasis-in-obstructive-sleep-apnea-patients
#13
Mutlu Acar, Hikmet Firat, Melike Yüceege, Aysun Şanal Doğan, Sinan Çalişkan, Canan Gürdal
OBJECTIVES: The aim of our study was to detect the presence of conjunctivochalasis (CCh) in obstructive sleep apnea (OSA) patients. METHODS: We included 54 subjects (41 OSA patients and 14 control subjects) in the study. All the patients were assessed regarding the presence and stage of CCh. RESULTS: The patients were grouped according to their apnea-hypopnea index as determined during nocturnal polysomnography in our laboratory as mild (12 patients), moderate (16 patients), and severe (13 patients) OSA...
January 17, 2017: Eye & Contact Lens
https://www.readbyqxmd.com/read/28099283/the-characteristics-of-excimer-laser-refractive-surgery-candidates
#14
Hassan Hashemi, Mehdi Khabazkhoob, Reza Pakzad, Abbasali Yekta, Marzieh Nojomi, Payam Nabovati
PURPOSE: To determine the demographic and refractive characteristics of excimer laser refractive surgery candidates in Iran. METHODS: This was a cross-sectional study between 2010 and 2014. All information was collected from 28 centers randomly selected from 12 provinces. Then, for each season of the year, one week was chosen through simple random selection, and within each week, 3 days were again chosen randomly. All excimer laser surgical procedures performed during these 3 days were identified by training staff, and data were extracted from patient charts...
January 17, 2017: Eye & Contact Lens
https://www.readbyqxmd.com/read/28099282/risk-factors-for-acanthamoeba-keratitis-a-multistate-case-control-study-2008-2011
#15
Allison C Brown, Jonathan Ross, Daniel B Jones, Sarah A Collier, Tracy L Ayers, Robert M Hoekstra, Bryon Backensen, Sharon L Roy, Michael J Beach, Jonathan S Yoder
OBJECTIVE: To identify modifiable risk factors contributing to Acanthamoeba keratitis (AK) infection. METHODS: A case-control investigation was conducted. Case patients were soft contact lens wearers with laboratory-confirmed AK. Control were soft contact lens wearers ≥12 years of age, with no history of AK. Case patients were recruited from 14 ophthalmology referral centers and a clinical laboratory. Control were matched on state of residence and type of primary eye care provider (ophthalmologist or optometrist)...
January 17, 2017: Eye & Contact Lens
https://www.readbyqxmd.com/read/28099281/vision-related-quality-of-life-before-and-after-deep-anterior-lamellar-keratoplasty
#16
Elvin Yildiz, Meltem Toklu, Ece Turan Vural
OBJECTIVES: To determine changes in the vision-related quality of life in patients undergoing deep anterior lamellar keratoplasty (DALK) by using the 25-item National Eye Institute Visual Function Questionnaire (NEI VFQ-25). METHODS: Thirty-five patients who were scheduled for DALK between March 1, 2013, and March 1, 2014 were asked to complete the NEI VFQ-25. NEI VFQ-25 was administered again at 6 months and at 1 year postoperatively. Data on patients' age, sex, preoperative diagnosis, preoperative and postoperative best-corrected visual acuity, and postoperative astigmatism were recorded...
January 17, 2017: Eye & Contact Lens
https://www.readbyqxmd.com/read/28092274/power-profiles-and-in-vitro-optical-quality-of-scleral-contact-lenses-effect-of-the-aperture-and-power
#17
Alberto Domínguez-Vicent, Jose Juan Esteve-Taboada, Alberto Recchioni
OBJECTIVE: To assess the power profile and in vitro optical quality of scleral contact lenses with different powers as a function of the optical aperture. METHODS: The mini and semiscleral contact lenses (Procornea) were measured for five powers per design. The NIMO TR-1504 (Lambda-X) was used to assess the power profile and Zernike coefficients of each contact lens. Ten measurements per lens were taken at 3- and 6-mm apertures. Furthermore, the optical quality of each lens was described in Zernike coefficients, modulation transfer function, and point spread function (PSF)...
January 13, 2017: Eye & Contact Lens
https://www.readbyqxmd.com/read/28079590/the-evaluation-of-corneal-fragility-after-uva-riboflavin-crosslinking
#18
Zhiwei Li, Yumeng Wang, Yanyun Xu, Vishal Jhanji, Chunxiao Zhang, Guoying Mu
PURPOSE: To evaluate the fragility of cornea after UVA/riboflavin crosslinking (CXL). METHODS: Sixty New Zealand rabbits received UVA/riboflavin crosslinking treatment (wavelength 365 nm, irradiance 3.0 mW/cm, and total dose 5.4 J/cm) on right eyes. Animals were sacrificed before and immediately after treatment (day 0), day 1, 3, 7, and 28 after treatment. A 4×10 mm corneal strip for biomechanical evaluation was harvested after sacrifice. The corneal fragility was evaluated by measurement of elongation rate, whereby the elongation rate equals elongation length/baseline length...
January 10, 2017: Eye & Contact Lens
https://www.readbyqxmd.com/read/28192377/application-of-casia-ss-1000-optical-coherence-tomography-tear-meniscus-imaging-in-testing-the-efficacy-of-new-strip-meniscometry-in-dry-eye-diagnosis
#19
Megumi Shinzawa, Murat Dogru, Keiichi Miyasaka, Jun Shimazaki, Tetsuju Sekiryu
PURPOSE: To investigate the applicability of CASIA SS-1000 anterior-segment optical coherence tomography (AS-OCT) imaging parameters in testing the efficacy of the new strip meniscometry (SM) namely "Strip Meniscometry Tube" (SMTube) in the diagnosis of dry eyes. METHODS: Forty-three eyes of 22 patients (4 men and 18 women) with definite dry eye disease (DED) and 49 eyes of 28 normal controls (6 men and 22 women) were studied. All subjects underwent symptom questionnaires, SMTube, the Schirmer-1 test, tear film break-up time measurement, vital staining examinations, as well as tear meniscus height (TMH) and TM area (TMA) measurements using an AS-OCT system...
January 6, 2017: Eye & Contact Lens
https://www.readbyqxmd.com/read/28181961/the-association-of-dry-eye-symptom-severity-and-comorbid-insomnia-in-us-veterans
#20
Anat Galor, Benjamin E Seiden, Jasmine J Park, William J Feuer, Allison L McClellan, Elizabeth R Felix, Roy C Levitt, Constantine D Sarantopoulos, Douglas M Wallace
PURPOSE: To investigate the association between dry eye (DE) and insomnia symptom severity. METHODS: Cross-sectional study of 187 individuals seen in the Miami Veterans Affairs eye clinic. An evaluation was performed consisting of questionnaires regarding insomnia (insomnia severity index [ISI]) and DE symptoms, including ocular pain, followed by a comprehensive ocular surface examination. Using a two-step cluster analysis based on intensity ratings of ocular pain, the patient population was divided into two groups (high and low ocular pain groups: HOP and LOP)...
January 6, 2017: Eye & Contact Lens
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