scholarly journals Pigmentation of the Cornea Secondary to Tinted Soft Contact Lens Wear

2012 ◽  
Vol 2012 ◽  
pp. 1-2
Author(s):  
Natasha Spiteri ◽  
Anshoo Choudhary ◽  
Stephen Kaye
Keyword(s):  
New York ◽  
Contact Lenses ◽  
Retrospective Case ◽  
Soft Contact ◽  
Contact Lens Wear ◽  
Soft Contact Lenses ◽  
Soft Contact Lens ◽  
Pathological Conditions ◽  
Normal Ageing ◽  
Lens Wear

Purpose. To report a case of pigmented corneal iron lines following use of tinted soft contact lenses (CL).Methods. A retrospective case report.Results. A 16-year-old girl was referred with suspected CL-related keratopathy OU, having recently switched to tinted soft monthly disposable CLs (8.4/14.0 −3.00 OD, −3.25 OS Aquamarine SofLens Natural Colours, Bausch and Lomb, New York, USA). Both corneas exhibited symmetric superficial corneal pigmented iron lines, which gradually disappeared following discontinuation of CL wear.Conclusions. Pigmented corneal rings have been reported in normal ageing corneas, in certain pathological conditions, and in association with altered corneal topography following LASIK and orthokeratology. We suspect a poorly fitting CL resulted in localised tear pooling between the CL and cornea, and subsequent iron pigment deposition, similar to that seen with orthokeratology. Cosmetic CLs bought via the Internet can be used in an unsupervised manner, with possible impacts on visual function and potential complications.

scholarly journals Effect of Soft Contact Lens Wear on Tear Film Break up Time

2020 ◽  
Vol 36 (2) ◽  
Author(s):  
Syeda Rushda Zaidi ◽  
Mohammad Ali A Sadiq ◽  
Shua Azam ◽  
Uzma Sattar ◽  
Samia Iqbal ◽  
...  
Keyword(s):  
Contact Lens ◽  
Contact Lenses ◽  
Tear Film ◽  
Soft Contact ◽  
Contact Lens Wear ◽  
Soft Contact Lens ◽  
History Of ◽  
Break Up ◽  
Medical University ◽  
Lens Wear

Purpose:  To see the effect of soft contact lens wears on tear breakup time. Study Design:  Descriptive Observational study. Place and Duration of Study:  College of Ophthalmology and Allied Vision Sciences, King Edward Medical University, Mayo Hospital, Lahore. From January to March 2016. Material and Methods:  Students of King Edward Medical University Lahore wearing soft contact lens for more than 3 months with no  known ocular pathology were selected by non-probability convenient sampling technique. Subjects with history of using any eye drops, history of oral drugs, which could cause dry eye and individuals any ocular disease, were excluded from the study. Tear film BUT was tested by using Fluorescein sodium dye and examinig under cobalt blue filter of slit lamp.SPSS version 20 is used to analyze the data. Results:  There were 30 participants with mean age of 24.5 ± 5 years. All were females. Sixty percent were wearing corrective lenses, and 40% were wearing cosmetic lenses. Out of 30 patients wearing contact lenses, only 6.67% had marginal tear film BUT and none of the patients has shown dry eyes. Individuals using contact lenses for 9 – 12 years had decreased BUT as compared to subjects using lenses for 3 – 6 months. 33.33% of extended lens wearers had reduced BUT as compared to disposable and daily wearers of contact lenses. Discomfort with contact lenses was observed in only 4 patients. Conclusion:  As the duration of contact lens wear increases, the tear film break up time decreases. Individuals using extended wear contact lenses are more prone to develop decreased TFBUT.

scholarly journals Contact Lens Visual Rehabilitation in Keratoconus and Corneal Keratoplasty

2012 ◽  
Vol 2012 ◽  
pp. 1-4 ◽  
Author(s):  
Yelda Ozkurt ◽  
Mehmet Atakan ◽  
Tugba Gencaga ◽  
Sezen Akkaya
Keyword(s):  
Contact Lens ◽  
Contact Lenses ◽  
Soft Contact ◽  
Visual Rehabilitation ◽  
Adequate Treatment ◽  
Contact Lens Wear ◽  
Soft Contact Lenses ◽  
Thinning Process ◽  
Lens Wear ◽  
Spectacle Correction

Keratoconus is the most common corneal distrophy. It’s a noninflammatory progressive thinning process that leads to conical ectasia of the cornea, causing high myopia and astigmatism. Many treatment choices include spectacle correction and contact lens wear, collagen cross linking, intracorneal ring segments implantation and finally keratoplasty. Contact lenses are commonly used to reduce astigmatism and increase vision. There are various types of lenses are available. We reviewed soft contact lenses, rigid gas permeable contact lenses, piggyback contact lenses, hybrid contact lenses and scleral-semiscleral contact lenses in keratoconus management. The surgical option is keratoplasty, but even after sutur removal, high astigmatism may stil exists. Therefore, contact lens is an adequate treatment option to correct astigmatism after keratoplasty.

scholarly journals Characterization of Soft Contact Lens Edge Fitting during Daily Wear Using Ultrahigh-Resolution Optical Coherence Tomography

2018 ◽  
Vol 2018 ◽  
pp. 1-6 ◽  
Author(s):  
Lele Cui ◽  
Sisi Chen ◽  
Weihe Zhou ◽  
Kaixuan Sheng ◽  
Lei Zhang ◽  
...  
Keyword(s):  
Optical Coherence Tomography ◽  
Contact Lens ◽  
Contact Lenses ◽  
Optical Coherence ◽  
Soft Contact ◽  
Ultrahigh Resolution ◽  
Soft Contact Lenses ◽  
Soft Contact Lens ◽  
Lens Wear ◽  
Peripheral Cornea

Purpose. To determine conjunctival overlap over the edge of soft contact lens and to visualize the peripheral postlens tear film (PoLTF) underneath soft contact lenses using ultrahigh-resolution optical coherence tomography (UHR-OCT). Methods. Twenty participants (4 males and 16 females, 23.0 ± 3.7 years) were fitted with two different types of soft contact lenses randomly. The limbus with lens was imaged with the UHR-OCT at the horizontal meridian every two hours up to 6 hours during lens wear. The conjunctival overlap was ranked as the percentage of the edge covered by the conjunctiva. The frequency of occurrence for visualized peripheral PoLTF was determined. Results. The average conjunctival overlaps at insertion were 49% and 73% for galyfilcon A and balafilcon A lenses and increased significantly to 84% and 90% by 6 hours of lens wear (P<0.001). Lenses with rounded edges had more conjunctival overlap than the lenses with angled edges (P=0.014). There were significant decreases for PoLTF on the conjunctiva (P=0.014) and peripheral cornea (P=0.004) over the study period compared to insertion. The percentage of subjects with PoLTF on the conjunctiva (32.5%) and peripheral cornea (36%) were greater in subjects wearing balafilcon A lenses (P=0.017). Conclusions. Increased conjunctival overlap over the lens edges and reduced PoLTF underneath the peripheral region of soft contact lenses were shown during lens daily wear. The lens edge configuration may play a role in conjunctival response and peripheral PoLTF.

scholarly journals Change in the geometry of positive- and negative-powered soft contact lenses during wear

PLoS ONE ◽  
2020 ◽  
Vol 15 (11) ◽  
pp. e0242095
Author(s):  
Bartlomiej J. Kaluzny ◽  
Joanna Stachura ◽  
Patryk Mlyniuk ◽  
Alfonso Jimenez-Villar ◽  
Magdalena Wietlicka-Piszcz ◽  
...  
Keyword(s):  
Contact Lenses ◽  
Specular Microscopy ◽  
Soft Contact ◽  
Swept Source ◽  
Contact Lens Wear ◽  
Soft Contact Lenses ◽  
Epithelial Thickness ◽  
Custom Made ◽  
Lens Wear

Contact lens wear causes mutual interactions between the ocular surface and the lens, which may affect comfort as well as vision. The aim of this study was to examine deformations in modern positive- and negative-powered silicone hydrogel soft contact lenses (SiH SCLs) after 7 days of continuous wear. This pre-post interventional study included 64 eyes: 42 eyes with myopia of -3.00 D and 22 eyes with hyperopia of +3.00 D. All patients underwent general ophthalmic examination, corneal topography/tomography, total corneal and epithelial thickness mapping, and specular microscopy before and after the wearing period. SiH SCLs made of senofilcon A were worn continuously for 7 days on all eligible eyes. The geometry of the new and used lenses was measured 3 to 6 minutes after removal in two perpendicular planes using a custom-made swept source optical coherence tomography (SS-OCT) system for in vitro measurements. The anterior and posterior radii of curvature decreased in -3.00 D lenses in two perpendicular planes. This effect correlated significantly with average keratometry of the cornea. Sagittal lens height was lower in +3.00 D lens after wear, which correlated moderately with the corneal sagittal height. A significant decrease in central corneal epithelial thickness was observed after wearing +3.0 D lenses. In conclusion, SiH SCLs made of senofilcon A undergo minor deformations after 7-day continuous wear. Geometry modifications are different for -3.00 D and +3.00 D lenses, and they imitate the shape of the anterior eye surface. These geometric changes are accompanied by a decrease in the central thickness of corneal epithelium after +3.00 D lens wear.

scholarly journals The structure of soft contact lens users and the incidence of papillary conjunctivitis in the analyzed groups according to the data of “Krugozor” ophthalmology clinic

The Eye ◽  
2020 ◽  
Vol 22 (4(132)) ◽  
pp. 30-35
Author(s):  
O. V. Dubovtseva ◽  
N. A. Bakalova
Keyword(s):  
Contact Lens ◽  
Contact Lenses ◽  
Moderate Degree ◽  
Soft Contact ◽  
Wear Time ◽  
Soft Contact Lenses ◽  
Soft Contact Lens ◽  
Vision Correction ◽  
Lens Wear ◽  
Giant Papillary Conjunctivitis

Introduction. Vision correction by contact lenses is one of the most common and effective methods for correcting refractive errors in children and adults. Compliance with rules of soft contact lenses (SCLs) wearing is one of the most important conditions for a safe use, while violation of compliance is usually the main cause of complications.Purpose. To study the structure of contact lens wearers by ametropia and lens wearing time as well as to determine the relationship between the incidence of giant papillary conjunctivitis (GPC) with lens wear time and overwear time.Material and methods. A retrospective analysis of 1 000 records (1 000 patients) of patients who underwent vision correction by SCLs in “Krugozor” ophthalmology clinic in the year 2019 was carried out. Mean age of patients was 24.95 ± 8.62 years. Age, type and degree of ametropia, material (hydrogel, silicone hydrogel or biocompatible hydrogel), lens replacement schedule, presence of complications, lens overwear time and daily wear time were taken into account.Results. Most SCLs users are patients between 21 and 30 years old (47%) who have a moderate degree of ametropia (52%). Most of them (46%) preferred monthly replacement SCLs, 29% – bi-weekly replacement SCLs, 9% preferred daily replacement lenses, while quarterly replacement lenses were used by 16%. Only 26.9% of SCL users complied with the instructions for lens wear, while for 29.4% of them lens overwear time amounted to up to 14 days, for 34.1% – up to 28 days, and for 9.6% – more than 1 month. More than half (56%) of patients mainly wore SCLs during 16 hours a day, one in five (22.7%) used SCLs during 12 hours a day, and 12.6% – up to 20 hours a day. 8.7% wore lenses during up to 7 days. The incidence of GPC in patients who did not comply with replacement schedule and were overwearing lenses was significantly higher (38.71%) than in patients who followed the replacement schedule (3.21%).Conclusion. More than half of the users comprised young people with a moderate degree of myopia. The most commonly used SCLs were monthly replacement. It was discovered that only one in four wearers followed recommendations of manufacturers and replaced lenses on time. Lens overwear may lead to a development of a giant papillary conjunctivitis (GPC). 

scholarly journals Myopia Control with Combination Low-Dose Atropine and Peripheral Defocus Soft Contact Lenses: A Case Series

2021 ◽  
pp. 548-554
Author(s):  
Nir Erdinest ◽  
Naomi London ◽  
Nadav Levinger ◽  
Yair Morad
Keyword(s):  
Low Dose ◽  
Contact Lenses ◽  
Case Series ◽  
Concentric Circle ◽  
Retrospective Case ◽  
Soft Contact ◽  
Myopia Progression ◽  
Soft Contact Lenses ◽  
Center Distance ◽  
Myopia Control

The goal of this retrospective case series is to demonstrate the effectivity of combination low-dose atropine therapy with peripheral defocus, double concentric circle design with a center distance soft contact lenses at controlling myopia progression over 1 year of treatment. Included in this series are 3 female children aged 8–10 years with progressing myopia averaging −4.37 ± 0.88 D at the beginning of treatment. Their average annual myopic progression during the 3 years prior to therapy was 1.12 ± 0.75 D. They had not attempted any myopia control treatments prior to this therapy. The children were treated with a combination of 0.01% atropine therapy with spherical peripheral defocus daily replacement soft lenses MiSight<sup>®</sup> 1 day (Cooper Vision, Phoenix, AZ, USA). They underwent cycloplegic refraction, and a slit-lamp evaluation every 6 months which confirmed no adverse reactions or staining was present. Each of the 3 children exhibited an average of 0.25 ± 0.25 D of myopia progression at the end of 1 year of treatment. To the best of the authors’ knowledge, this is the first published study exhibiting that combining low-dose atropine and peripheral defocus soft contact lenses is effective at controlling children’s moderate to severe myopia progression during 1 year of therapy.

Management of Focal Limbal Stem Cell Deficiency Associated With Soft Contact Lens Wear

Cornea ◽  
2011 ◽  
Vol 30 (1) ◽  
pp. 18-23 ◽  
Author(s):  
Bennie H Jeng ◽  
Colleen P Halfpenny ◽  
David M Meisler ◽  
E Lee Stock
Keyword(s):  
Stem Cell ◽  
Contact Lens ◽  
Limbal Stem Cell Deficiency ◽  
Soft Contact ◽  
Contact Lens Wear ◽  
Soft Contact Lens ◽  
Limbal Stem Cell ◽  
Lens Wear
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