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Eye & Contact Lens

Mustafa Doğan, Serkan Özcan, Gürsel Acartürk, Çiğdem Özdemir
PURPOSE: To evaluate the ocular surface changes and tear-film functions in patients with inflammatory bowel disease (IBD). METHODS: The IBD group included 57 patients, and the control group included 29 healthy individuals. The Schirmer I test, tear breakup time (TBUT), corneal and conjunctiva fluorescent staining, and conjunctival impression cytology tests were performed to both groups. RESULTS: The rate of dry eye was 56.1% and 10.3% in the IBD and control groups, respectively, as assessed by the Schirmer I test (P<0...
July 12, 2018: Eye & Contact Lens
Maria Serramito-Blanco, Carlos Carpena-Torres, Jesús Carballo, David Piñero, Michael Lipson, Gonzalo Carracedo
OBJECTIVE: To evaluate changes in the anterior corneal curvature and aberrometry after scleral contact lens wear in keratoconus (KC) subjects with and without intracorneal ring segments (ICRS). METHODS: Twenty-six subjects diagnosed with keratoconus were selected to participate in the study. Subjects were divided into 2 groups, those with ICRS (KC-ICRS group) and those without ICRS (KC group). Subjects were instructed to wear 16.5-mm scleral lenses for 8 hours. Topographic and aberrometric parameters were evaluated before lens wear and immediately after lens removal...
July 12, 2018: Eye & Contact Lens
Eisuke Shimizu, Takefumi Yamaguchi, Kazuo Tsubota, Jun Shimazaki
OBJECTIVES: To evaluate corneal higher-order aberrations (HOAs) in eyes with corneal scar after traumatic perforation and their correlation with visual acuity. METHODS: This retrospective consecutive case study included 40 eyes of 40 consecutive patients (mean age, 39.2±21.6 years), treated for traumatic corneal perforation at Tokyo Dental College, and 18 normal control eyes. Higher-order aberrations of anterior and posterior corneal surfaces and total cornea were analyzed by swept-source optical coherence tomography...
July 12, 2018: Eye & Contact Lens
Hassan Hashemi, Mehdi Khabazkhoob, Reza Pakzad, Salomeh Bakhshi, Hadi Ostadimoghaddam, Amir Asaharlous, Reihaneh Yekta, Mohamadreza Aghamirsalim, Abbasali Yekta
OBJECTIVES: This study aims to determine the diagnostic ability of Pentacam indices for keratoconus and identifying the best index for differentiating diseased from normal cases. METHOD: In this study, 150 keratoconus patients and 150 refractive surgery candidates with a definitive diagnosis of normal healthy corneas were enrolled. Initially, the placido disk topography imaging was performed. The keratoconus and normal corneas were defined based on placido disk topographic data from Rabinowitz-McDonnell...
July 12, 2018: Eye & Contact Lens
Khosrow Jadidi, Saman Mohazzab-Torabi, Shiva Pirhadi, Mostafa Naderi, Abbasali Yekta, Sara Sardari, Mehdi Khabazkhoob
PURPOSE: This study compares the corneal biomechanical properties, as measured with Corvis ST, in three groups of cases with delayed-onset mustard gas keratopathy (DMGK), chronic corneal scarring (CCS), and those with normal corneas. METHODS: Forty-five eyes were enrolled in the DMGK, CCS, and normal groups (15 eyes each). All patients were examined with the slitlamp and Corvis ST. Extracted corneal biomechanical parameters included first and second applanation time (AT1, AT2), first and second applanation length (AL1, AL2), first and second applanation velocity (AV1, AV2), deformation amplitude (DA), highest concavity time, peak distance, highest concavity radius (HCR), central corneal thickness, corrected intraocular pressure (IOP), and noncorrected IOP...
July 12, 2018: Eye & Contact Lens
Caterina Sarnicola, Asim V Farooq, Kathryn Colby
Fuchs endothelial corneal dystrophy (FECD) is the most common indication for corneal transplantation in the United States, accounting 36% of the almost 47,000 transplants performed in 2016. Although the surgical management of FECD has undergone a revolution over the past 20 years, its pathogenesis remains elusive, with multiple putative disease pathways and an ever increasing number of candidate genes thought to play a role. This review will summarize the recent advancements in our understanding of the biology of FECD, including potential parallels with neurodegenerative disease like amyotrophic lateral sclerosis and will highlight prospects for future treatment advances...
July 12, 2018: Eye & Contact Lens
Abdullah Kaya, Canan Gürdal
Demodex is an important pathogen in ophthalmology. It is believed to cause a variety of eyelid and eyelash diseases. Currently, light microscopes are being used for imaging demodex. However, microscopes are not available everywhere. Also, it is not cost-effective to perform light microscopy in every case. In this case, we demonstrate a new method: imaging demodex using cell phone. A 90-diopter noncontact double aspheric lens was attached to the posterior camera of the smartphone with clear tape. An eyelash of a patient with blepharitis was removed...
June 25, 2018: Eye & Contact Lens
Mert Simsek, Ufuk Elgin, Mehmet Murat Uzel, Emine Sen, Pelin Yilmazbas
OBJECTIVES: To investigate the postoperative changes in the anterior segment parameters by Scheimpflug imaging method in patients undergoing trabeculectomy surgery. METHODS: This prospective study included 38 phakic eyes of 38 patients with primary open-angle glaucoma who underwent trabeculectomy. Anterior chamber angle (ACA), anterior chamber depth (ACD), anterior chamber volume (ACV), and central corneal thickness (CCT) of the eyes were measured by performing Scheimpflug imaging in preoperative (baseline) and postoperative periods (1st week and 1st, 3rd, and 6th months after the surgery)...
June 25, 2018: Eye & Contact Lens
Mehrdad Mohammadpour, Zahra Heidari, Ratishta Molani
OBJECTIVES: To assess and compare the efficacy of two nonsteroidal anti-inflammatory drugs (NSAIDs), namely diclofenac and ketorolac, for pain control after photorefractive keratectomy (PRK). METHODS: In this double-masked clinical study, 60 patients treated bilaterally with PRK were randomly allocated into two groups. Postoperatively, one group of patients received diclofenac 0.1% drops and the other group was prescribed ketorolac 0.5% ophthalmic drops in both eyes every 6 hr on the first day and then, no NSAID was applied until the third day...
June 25, 2018: Eye & Contact Lens
Hassan Hashemi, Amir Asharlous, Mohammad Aghazadeh Amiri, Abbasali Yekta, Shahroukh Ramin, Azadeh Taheri, Mohamadreza Aghamirsalim, Mehdi Khabazkhoob
OBJECTIVES: To evaluate the repeatability of anterior chamber depth (ACD) measurements by Orbscan and Pentacam imaging devices in different grades of keratoconus. METHODS: One examiner performed 3 consecutive ACD measurements with both devices on 74 eyes of 42 keratoconus patient. Repeatability was assessed using intrasession test-retest variability. Within-subject SD was determined for repeatability, and the coefficient of variation was calculated for each measurement...
June 25, 2018: Eye & Contact Lens
Terin E Dupre, William J Benjamin
OBJECTIVES: The relationship between water (W) content and silicon (Si) content of silicone-hydrogel (SiHy) contact lens materials was inspected using identical methodologies, equipment, and operators for materials composing 16 types of commercially available SiHy contact lenses. Fluorine (F) content was included in the analysis for the three materials also containing a fluoropolymer. One type of lens consisted of a bulk SiHy material coated with thin layers of conventional hydrogel. METHODS: SiHy materials were obtained in the form of 16 contact lens brands purchased on the open market in a common range of refractive powers from -3 to +6 D in single lots...
June 25, 2018: Eye & Contact Lens
Darren Shu Jeng Ting, Giuseppe Bignardi, Roland Koerner, Luciane D Irion, Elizabeth Johnson, Stephen J Morgan, Saurabh Ghosh
OBJECTIVES: To report the first case of fungal keratitis caused by Cryptococcus curvatus after penetrating keratoplasty (PK) in an immunocompetent patient and to describe its therapeutic challenge and long-term outcome. METHODS: An interventional case report. RESULTS: A 54-year-old female patient underwent right PK for lattice dystrophy. At 5-year post-PK, she developed a polymicrobial keratitis caused by Candida parapsilosis, and Stenotrophomonas maltophilia at the peripheral graft, which was successfully treated with topical antibiotic and antifungal drops...
June 25, 2018: Eye & Contact Lens
Hanefi Çakır, Selim Genç, Emre Güler
OBJECTIVE: To evaluate the effectiveness of circular keratotomy combined with wedge resection for the management of high astigmatism after penetrating keratoplasty (PK). METHODS: The study included seven eyes of seven patients with previous PK who underwent circular keratotomy combined with wedge resection. The uncorrected visual acuity (UCVA) and best-corrected visual acuity (BCVA), spherical equivalent (SE) refraction, and keratometric powers obtained by corneal topography were evaluated...
June 25, 2018: Eye & Contact Lens
Burcu Yucekul, Mehmet C Mocan, Sibel Kocabeyoglu, Cagman Tan, Murat Irkec
OBJECTIVES: To determine whether silicone hydrogel (SH) contact lens (CL) use, with or without meibomian gland dysfunction (MGD), promotes ocular surface inflammation. METHODS: Subjects wearing SH-CL for at least 6 months who also had coexisting MGD (group 1, n=20), SH-CL users who did not have MGD (group 2, n=20), patients who had MGD but did not use CL (group 3, n=20), and healthy CL-naive individuals with no known systemic or ocular diseases (group 4, n=20) were included in this cross-sectional, single-center study...
June 25, 2018: Eye & Contact Lens
Feng Zhao, Guiyang Zhao, Zhihua Zhao
PURPOSE: To investigate the changes in the quality of life and behaviors in children before and after wearing orthokeratology lenses and to analyze the potential impact of orthokeratology lenses on children's quality of life, behaviors, and the progression of myopia. METHODS: A total of 100 children receiving orthokeratology lenses in the People's Hospital of Hebei Province and the Nanjing First Hospital from January 2016 to February 2017 were enrolled in this study...
June 25, 2018: Eye & Contact Lens
Canan Asli Utine, Ceren Durmaz Engin, Ziya Ayhan
OBJECTIVES: To assess the corneal topometric parameters that can be predictive for better visual gain after intracorneal ring segment (ICRS) implantation in eyes with keratoconus. METHODS: A total of 42 eyes of 32 patients who underwent ICRS implantation at Dokuz Eylul University, Deparment of Ophthalmology, Cornea Divison were included. Changes in uncorrected distance visual acuity (UDVA), corrected distance visual acuity (CDVA), refractive errors, and corneal topometric indices measured using Scheimpflug topography (Pentacam, Oculus) were evaluated retrospectively...
June 25, 2018: Eye & Contact Lens
Daddi Fadel
INTRODUCTION: The advent of high oxygen permeability (Dk) of rigid contact lens materials has reduced complications related to hypoxia when using scleral contact lenses (ScCLs). However, new issues and complications have emerged. Some of these issues and complications are caused by the nonoptimal fitting relationship with the underlying ocular surface, which may pose a challenge in their management. METHOD: PubMed searches using different keywords and an investigation into the issues and complications etiology were conducted...
June 25, 2018: Eye & Contact Lens
Li-Chun Chang, Li-Ling Liao
PURPOSE: To assess the visual acuity and compliance with the use of orthokeratology lenses (OrthoK) in school children. METHODS: A retrospective study was conducted to determine the education-related factors influencing the improvement in visual acuity in myopic students using OrthoK in five primary schools in Taiwan. RESULTS: Of the 5,173 eligible students from five primary schools, 1906 (36.8%) students were diagnosed with myopia. Among 201 (10...
June 25, 2018: Eye & Contact Lens
Mehdi Roozbahani, Kristin M Hammersmith, Parveen K Nagra, Jenny F Ma, Christopher J Rapuano
PURPOSE: To report the indications, outcomes, and complications of therapeutic penetrating keratoplasty (Th PK) in patients with corneal perforation and/or nonhealing corneal ulceration. METHODS: A retrospective review was conducted of 51 eyes of 51 patients undergoing Th PK between January 1, 2006 and April 15, 2016. Data collected included patient demographics, visual acuity (VA), size of the corneal infiltrate and epithelial defect, degree of corneal thinning/perforation, microbiological results, surgical details, and postoperative complications...
June 25, 2018: Eye & Contact Lens
Alex L K Ng, Tommy C Y Chan, Arthur C K Cheng
OBJECTIVES: To compare the various Pentacam-measured K-readings with the clinical history method (CHM) in eyes that have undergone myopic laser in situ keratomileusis (LASIK). METHODS: In this prospective study, Pentacam examination was performed in 71 eyes 1 month after myopic LASIK. The true net power (TNP) 4 mm, total corneal refractive power (TCRP) 4 mm, equivalent K-reading (EKR) 4.0 mm, and EKR 4.5 mm obtained from the same scan were compared with the K derived from CHM...
June 25, 2018: Eye & Contact Lens
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