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Contact Lens & Anterior Eye: the Journal of the British Contact Lens Association

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https://www.readbyqxmd.com/read/30598259/rigid-gas-permeable-contact-lenses-for-visual-rehabilitation-of-unilateral-aphakic-children-in-china
#1
Xiaoxiao Zhang, Junwen Zeng, Dongmei Cui, Zhouyue Li, Yin Hu, Wen Long, Xiao Yang
PURPOSE: To investigate the effectiveness, safety and tolerance of rigid gas-permeable contact lenses (RGP CLs) in the visual rehabilitation of unilateral aphakic children in China. METHODS: Records of 36 children (36 eyes) with RGP CLs to unilateral aphakia between 2014 and 2018 were evaluated. Each enrolled child underwent vision assessment (visual acuity, fixation, and deviation) at each follow-up visit and their caregivers completed a questionnaire designed to find out the reasons for RGP CLs dropout...
December 28, 2018: Contact Lens & Anterior Eye: the Journal of the British Contact Lens Association
https://www.readbyqxmd.com/read/30594471/a-novel-method-in-correcting-aberropia-using-pin-hole-soft-contact-lenses-a-case-report
#2
Lavanya Kalikivayi, Jithu Ajitha Vilasendran, Antony Chettupuzha Lonappan, Sajeev Cherian Jacob, Venkataramana Kalikivayi
Aberropia leads to decrease in image quality due to higher order aberrations (HOA). Correction of these HOA poses a great challenge to clinicians. A case report is presented here where a 30 year old male visited with complaints of cloudy vision, diplopia in reduced illumination along with inferior vertical elongation of light during night time in the right eye since 6 years. The unaided visual acuity was found to be 0.0 Log MAR units and near acuity was N6. The patient did not accept any correction in subjective refraction...
December 26, 2018: Contact Lens & Anterior Eye: the Journal of the British Contact Lens Association
https://www.readbyqxmd.com/read/30587408/randomized-crossover-trial-of-silicone-hydrogel-contact-lenses
#3
María García-Montero, Laura Rico-Del-Viejo, Clara Llorens-Quintana, Amalia Lorente-Velázquez, Jose Luis Hernández-Verdejo, David Madrid-Costa
PURPOSE: The aim of the current study is to assess, using new technologies, the interaction of four monthly silicone hydrogel contact lenses on the ocular surface and the comfort over 15 days of use. METHODS: Prospective cross-over, randomized and double-masked study including four materials (lotrafilcon-B, samfilcon-A , comfilcon-A and filcom-V3). Clinical examination was performed in the following order: tear meniscus height, first break-up of the tear film, the average time of all tear film breakup incidents, bulbar redness, limbal redness (Keratograph 5M ,Oculus, Germany); central corneal thickness (Pentacam, Oculus, Germany), thermography values (FLIR A325; FLIR Systems Inc...
December 23, 2018: Contact Lens & Anterior Eye: the Journal of the British Contact Lens Association
https://www.readbyqxmd.com/read/30578003/impact-of-soft-contact-lenses-on-lid-parallel-conjunctival-folds
#4
Heiko Pult, Britta H Riede-Pult
PURPOSE: Lid-parallel conjunctival folds (LIPCOF) are related to dry eye symptoms and appear to be related to mechanical forces in blinks. The primary aim of this longitudinal, parallel group study was to investigate impact of contact lens wear (CLW) on LIPCOF and secondly the impact of contact lens wear on lid-wiper epitheliopathy (LWE) and dry eye symptoms. METHODS: After a 2-week wash-out phase with a hydrogen peroxide care regimen, 30 experienced contact lens wearers (female: 25, male: 5; median age: 34...
December 18, 2018: Contact Lens & Anterior Eye: the Journal of the British Contact Lens Association
https://www.readbyqxmd.com/read/30573298/evaluation-of-an-enhanced-viscosity-artificial-tear-for-moderate-to-severe-dry-eye-disease-a-multicenter-double-masked-randomized-30-day-study
#5
Christopher Lievens, Gregg Berdy, David Douglass, Stephen Montaquila, Hugh Lin, Peter Simmons, Cindy Carlisle-Wilcox, Joseph Vehige, Sameena Haque
PURPOSE: In a randomized, controlled clinical trial, two lubricant artificial tear formulations with enhanced viscosity were compared: an investigational product at the time, containing carboxymethylcellulose 1.0% and glycerin 0.9% (CMC-GLY) with osmoprotectants, and a standard formula containing carboxymethylcellulose 1.0% alone (CMC). METHODS: This double-masked study recruited patients with moderate to severe dry eye at 10 US centers. After a 7-day run-in with CMC 0...
December 17, 2018: Contact Lens & Anterior Eye: the Journal of the British Contact Lens Association
https://www.readbyqxmd.com/read/30545776/lactoferrin-loaded-contact-lenses-counteract-cytotoxicity-caused-in-vitro-by-keratoconic-tears
#6
Valentina Pastori, Silvia Tavazzi, Marzia Lecchi
Lactoferrin (LF), an iron-binding protein with antioxidant activity, is significantly reduced in the lacrimal film of patients affected by keratoconus (KC) compared to healthy subjects, and this is supposed to be the cause for tear iron increase and consequent iron deposition and oxygen free radical accumulation in the cornea. We decided to study if LF-loaded contact lenses (LF-CLs) could exert antioxidant activity on epithelial cells incubated in tears collected from two patients affected by keratoconus (KC1 and KC2)...
December 11, 2018: Contact Lens & Anterior Eye: the Journal of the British Contact Lens Association
https://www.readbyqxmd.com/read/30545775/tear-dynamics-under-scleral-lenses
#7
Vivien Tse, Bo Tan, Young Hyun Kim, Yixiu Zhou, Meng C Lin
PURPOSE: To evaluate post-lens tear dynamics at two different time points during scleral lens wear in two cohorts with 10 neophytes each. METHODS: All subjects wore bilaterally scleral lenses for 5 h on 3 separate visits. Post-lens tear exchange was measured using Out-in method, which required 5 μL of 2% FITC-Dextran instilled on the bulbar conjunctiva during lens wear. Time taken to observe the first sign of fluorescence in post-lens tear reservoir was recorded with a stopwatch...
December 10, 2018: Contact Lens & Anterior Eye: the Journal of the British Contact Lens Association
https://www.readbyqxmd.com/read/30538061/evaluation-estrogen-progesteron-and-androgen-receptor-expressions-in-corneal-epithelium-in-keratoconus
#8
Berna Ayan, Nilay Yuksel, Ahmet Carhan, Berrak Gumuşkaya Ocal, Emine Akcay, Nurullah Cagil, Mehmet Dogan Asik
PURPOSE: To evaluate the role of sex steroid hormone receptors in corneal epithelium in etiopathogenesis of keratoconus (KC). METHODS: Thirty patients with KC who were planned for corneal collagen-crosslinking and 20 patients who were planned for excimer laser for refractive errors included in this study. Corneal epitheliums were curated mechanically during surgeries. Right eyes were evaluated immunohistochemically and left eyes were evaluated by quantitative polymerase chain reaction (qPCR) to investigate estrogenα, estrogenβ, progesterone and androgen receptors...
December 8, 2018: Contact Lens & Anterior Eye: the Journal of the British Contact Lens Association
https://www.readbyqxmd.com/read/30538060/clinical-factors-associated-with-contact-lens-dropout
#9
Andrew D Pucker, Lisa A Jones-Jordan, Sebastian Marx, Daniel R Powell, Justin T Kwan, Sruthi Srinivasan, Wolfgang Sickenberger, Lyndon Jones
PURPOSE: Contact lens (CL) dropout is estimated to be approximately equal to the number of new wearers per year, resulting in virtually no growth in the global CL market. The purpose of this study was to determine ocular and CL factors associated with CL dropout. METHODS: This five-site study recruited subjects 18-45 years of age who had ceased CL wear within the past 6-12 months due to discomfort. Dropout subjects were compared to age- and sex-matched currently successful CL wearers...
December 8, 2018: Contact Lens & Anterior Eye: the Journal of the British Contact Lens Association
https://www.readbyqxmd.com/read/30528766/investigating-the-subjective-cooling-effect-of-eyelid-cleansing-gel-on-eyelid-and-ocular-surface-temperature
#10
Paramdeep Bilkhu, James Wolffsohn, Qasim Mahmood, Christine Purslow
PURPOSE: To investigate if the application of Blephagel, an eyelid cleansing gel, causes subjective and/or objective cooling effects by measuring ocular symptomology and temperature. METHODS: Twenty-five healthy subjects underwent baseline non-invasive temperature measurements on the closed upper eyelid (centrally, nasally, and temporally) and ocular surface temperature (OST) on both eyes using an infrared camera. A standard application of Blephagel was then applied to the closed upper eyelid and eyelashes with a sterile cotton-wool to one eye selected at random...
December 7, 2018: Contact Lens & Anterior Eye: the Journal of the British Contact Lens Association
https://www.readbyqxmd.com/read/30514612/scleral-schism
#11
EDITORIAL
Eef van der Worp, Lynette Johns, Melissa Barnett
No abstract text is available yet for this article.
December 1, 2018: Contact Lens & Anterior Eye: the Journal of the British Contact Lens Association
https://www.readbyqxmd.com/read/30509724/intraocular-pressure-iop-measurements-in-keratoconic-patients-do-variations-in-iop-respect-variations-in-corneal-thickness-and-corneal-curvature
#12
Rebecca Cairns, Katie Graham, Michael O'Gallagher, A Jonathan Jackson
PURPOSE: To explore the relationship between intraocular pressure (IOP) measurements and topographical variations in corneal curvature and corneal thickness in a cohort of keratoconic patients presenting to a newly-established regional Keratoconic diagnostic and monitoring clinic in Northern Ireland. METHODS: IOP was recorded, using a hand held ICARE tonometer, at central, nasal and temporal locations on keratoconic corneae of 27 consecutive patients attending clinic...
November 30, 2018: Contact Lens & Anterior Eye: the Journal of the British Contact Lens Association
https://www.readbyqxmd.com/read/30502960/corneal-structure-transparency-thickness-and-optical-density-densitometry-especially-as-relevant-to-contact-lens-wear-a-review
#13
REVIEW
Michael J Doughty, Sven Jonuscheit
Clinical instruments using Scheimpflug image-based methods to obtain optical sectional images of the cornea have been introduced in recent years along with proposals that it should be possible to routinely and reliably measure the optical density (referred to as the densitometry) of the human cornea in situ. Such a concept is reviewed from the perspective of what might be considered as the basic principles underlying the understanding of corneal transparency (from the 1950's) and the progressive changes in these ideas from subjective slitlamp-based clinical observations from the late 1960's, especially in contact lens wearers...
November 28, 2018: Contact Lens & Anterior Eye: the Journal of the British Contact Lens Association
https://www.readbyqxmd.com/read/30501928/determination-of-central-corneal-clearance-in-scleral-lenses-with-an-optical-biometer-and-agreement-with-subjective-evaluation
#14
Rute J Macedo-de-Araújo, Ana Amorim-de-Sousa, António Queirós, Eef van der Worp, José M González-Méijome
PURPOSE: To compare three methods to measure center corneal clearance (CCC) during scleral lens wear: subjective (slit lamp), image processed (ImageJ) and with an optic biometer. The optic biometer technique was validated in comparison to an OCT in the first part of the study. METHODS: Twenty-two eyes (11 subjects) with healthy corneas were recruited. Three measures of OCT with scleral lens and ten measurements of axial length (AL) with IOLMaster with and without lens were performed...
November 27, 2018: Contact Lens & Anterior Eye: the Journal of the British Contact Lens Association
https://www.readbyqxmd.com/read/30497904/effects-of-a-sea-buckthorn-oil-spray-emulsion-on-dry-eye
#15
Petra Larmo, Riikka Järvinen, Jarmo Laihia, Eliisa Löyttyniemi, Laura Maavirta, Baoru Yang, Heikki Kallio, Minna Sandberg-Lall
PURPOSE: To investigate the effects of a sea buckthorn oil and sodium hyaluronate-containing eyelid spray emulsion (SB spray) on dry eye. METHODS: A randomized controlled study was carried out. Adults (25-70 years) with Ocular Surface Disease Index (OSDI) ≥20 and moderate or severe dryness, burning or grittiness of the eyes were included. In study part one (n = 2), SB spray was used on both closed eyelids four times in one day. In part two (n = 10), SB spray was used on one randomized eyelid, and a commercial reference spray on the other for nine days...
November 26, 2018: Contact Lens & Anterior Eye: the Journal of the British Contact Lens Association
https://www.readbyqxmd.com/read/30497903/rationale-for-24-hour-management-of-dry-eye-disease-a-review
#16
REVIEW
M Guillon, S Shah
The symptom severity of patients with dry eye disease (DED) varies over a 24-hour period. It is typically worse upon waking than later in the morning and deteriorates towards the evening. Substantial differences in the characteristics and physical properties of the tear film, such as levels of inflammation, pH, osmolarity, volume and stability, also exist between night (sleeping) and day (waking), and over the course of the day itself. Data on diurnal variation in symptom severity and tear film characteristics have been reviewed to recommend a management strategy that supports the various needs of patients with DED over a full 24-hour period...
November 26, 2018: Contact Lens & Anterior Eye: the Journal of the British Contact Lens Association
https://www.readbyqxmd.com/read/30497902/the-ability-of-the-contact-lens-dry-eye-questionnaire-cldeq-8-to-detect-ocular-surface-alterations-in-contact-lens-wearers
#17
Alberto López-de la Rosa, Cristina Arroyo-Del Arroyo, Amalia Enríquez-de-Salamanca, José Pinto-Fraga, Alberto López-Miguel, María J González-García
PURPOSE: To study whether some ocular surface alterations could be associated with contact lens (CL) wearers suffering from CL discomfort (CLD) detected using the Contact Lens Dry Eye Questionnaire (CLDEQ)-8. METHODS: Forty-one soft CL wearers further classified into symptomatic CL wearers (SCLW) and asymptomatic CL wearers (ACLW) by the CLDEQ-8, and 20 non CL wearers (NCLW) were included. Tear osmolarity, slit-lamp biomicroscopy findings, tear film break-up time, corneal and conjunctival staining, and Schirmer test were performed 24 h after CL removal...
November 26, 2018: Contact Lens & Anterior Eye: the Journal of the British Contact Lens Association
https://www.readbyqxmd.com/read/30482511/the-effect-of-pregnancy-on-tear-osmolarity
#18
Mustafa Duran, İnci Güngör
OBJECTIVE: To examine the effect of pregnancy on the lacrimal system through tear osmolarity measurement and the Schirmer test. MATERIAL AND METHOD: The study consisted of two groups of 30 women between 20 and 40 years old; the women in the study group were in their first trimester of pregnancy, and the women in the control group were not pregnant and did not have any diseases other than refractive error. Tear osmolarity measurement with the TearLab osmolarity system and tear function test Schirmer 1 were carried out on one, randomly chosen eye of each participant...
November 24, 2018: Contact Lens & Anterior Eye: the Journal of the British Contact Lens Association
https://www.readbyqxmd.com/read/30482510/adjunctive-effect-of-orthokeratology-and-low-dose-atropine-on-axial-elongation-in-fast-progressing-myopic-children-a-preliminary-retrospective-study
#19
Zhi Chen, Shengmei Huang, Jiaqi Zhou, Qu Xiaomei, Xingtao Zhou, Feng Xue
PURPOSE: To investigate the adjunctive effect of orthokeratology (ortho-k) and low-dose atropine eye drops on axial length elongation in fast-progressing myopic children. METHODS: Axial elongation in 60 eyes of 60 subjects who completed two years of ortho-k treatment was retrospectively reviewed. They were aged between 5.6-11.6 (mean, 8.3 ± 1.5) years old when they started ortho-k treatment. During their first year of ortho-k treatment (Phase One), they all demonstrated a faster than 0...
November 24, 2018: Contact Lens & Anterior Eye: the Journal of the British Contact Lens Association
https://www.readbyqxmd.com/read/30473322/pellucid-marginal-degeneration-detection-discrimination-from-other-corneal-ectatic-disorders-and-progression
#20
REVIEW
Antonio Martínez-Abad, David P Piñero
Pellucid marginal degeneration (PMD) is a non-inflammatory ectatic corneal disease characterized by a narrow band of corneal thinning separated from the limbus by a relatively uninvolved area 1-2 mm in width. It is a rare corneal disorder that shares many clinical characteristics with other corneal ectasias, such as keratoconus, keratoglobus or Terrien marginal degeneration. PMD usually starts later in life than keratoconus and progresses slower than keratoconus. Slit-lamp examination is very useful to distinguish PMD from other corneal ectatic disorders with inflammatory nature...
November 22, 2018: Contact Lens & Anterior Eye: the Journal of the British Contact Lens Association
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