نتایج جستجو برای: lenses

تعداد نتایج: 13573  

افشار, محمد, امینی, عبدا.., حسن زاده طاهری, محمد مهدی, حقیقی, فاطمه, داوری, محمد حسین, سعادتجو, سید علیرضا, شریفی مود, فرنوش,

Background and Aim: Cataract is a major occular disease that causes blindness in many developing countries of the world. Experimental model of cataract is a first necessity to study the preventive factors of cataract progression. Several studies have shown that some glucocorticoides such as Dexamethasone (DEX) can induce cataract. The aim of this study was to form cataract in chick embryo. Mate...

2015
Nery García-Porta Laura Rico-del-Viejo Helena Ferreira-Neves Sofia C. Peixoto-de-Matos Antonio Queirós José M. González-Méijome

PURPOSE To evaluate the clinical performance of a silicone hydrogel (Si-Hy) soft contact lens (CL) in combination with three different multipurpose disinfecting solutions (MPDSs). METHODS This was a prospective, randomized, single-masked, crossover, and comparative study in which 31 habitual soft CL wearers were randomly assigned to one of the three MPDSs (Synergi, COMPLETE RevitaLens, and OP...

Journal: :Applied and environmental microbiology 1978
S C Busschaert R C Good J Szabocsik

The kinetics and efficacy of moist heat disinfection for hydrophilic contact lenses were investigated by using representative microorganisms of ophthalmic concern and several heat-resistant species. In replicate challenges, 80 degrees C for 10 min and 75 degrees C for 5 min were proven efficacious for moist-heat disinfection.

Journal: :Optics letters 2007
Ramkumar Sabesan Tae Moon Jeong Luis Carvalho Ian G Cox David R Williams Geunyoung Yoon

Higher-order aberration correction in abnormal eyes can result in significant vision improvement, especially in eyes with abnormal corneas. Customized optics such as phase plates and customized contact lenses are one of the most practical, nonsurgical ways to correct these ocular higher-order aberrations. We demonstrate the feasibility of correcting higher-order aberrations and improving visual...

Journal: :Journal of optometry 2015
Alex Muntz Lakshman N Subbaraman Luigina Sorbara Lyndon Jones

Tear exchange beneath a contact lens facilitates ongoing fluid replenishment between the ocular surface and the lens. This exchange is considerably lower during the wear of soft lenses compared with rigid lenses. As a result, the accumulation of tear film debris and metabolic by-products between the cornea and a soft contact lens increases, potentially leading to complications. Lens design inno...

Journal: :American journal of ophthalmology 2013
Bruce H Koffler James J Sears

PURPOSE To compare the safety and efficacy of orthokeratology as a nonsurgical treatment for myopia in children with alternate methods, such as soft contact lenses, rigid gas permeable lenses, and spectacles, throughout multiple studies. DESIGN Perspective with literature review. METHODS Analysis of recent studies to determine the safety and effectiveness of orthokeratology versus soft cont...

Journal: :Eye & contact lens 2012
Garima Tyagi David Alonso-Caneiro Michael Collins Scott Read

OBJECTIVES The aim of this study was to measure tear film surface quality (TFSQ) using dynamic high-speed videokeratoscopy during short-term (8 hrs) use of rigid and soft contact lenses. METHODS A group of 14 subjects wore 3 different types of contact lenses on 3 different nonconsecutive days (order randomized) in 1 eye only. The subjects were screened to exclude those with dry eye. The lense...

2018
Seung Mok Lee Ji Eun Lee Da In Lee Hak Sun Yu

BACKGROUND This study aimed to evaluate the adhesion of Acanthamoeba trophozoites on cosmetic contact lenses (CLs) with and without CL care multipurpose solution (MPS) treatment. METHODS Acanthamoeba lugdunensis L3a trophozoites were inoculated onto disks trimmed from CLs: 1-day Acuvue moist, 1-day Acuvue define, Acuvue 2, and Acuvue 2 define. After 18-hour inoculation, the number of adherent...

Journal: :Investigative ophthalmology & visual science 2003
Kimberly L Miller Kenneth A Polse Clayton J Radke

PURPOSE Extended wear of conventional hydrogel soft contact lenses (SCLs) is associated with adverse ocular responses. Some of these ocular events are thought to result from inadequate tear mixing in the postlens tear film (PoLTF). Therefore, strategies to increase tear mixing may improve the safety of extended-wear SCLs. Recently, it has been suggested that placing fenestrations in soft lenses...

2014
Jeffery Schafer Robert Steffen Marjorie J Rah

PURPOSE We aimed to evaluate the product performance of a novel one-step hydrogen peroxide cleaning and disinfecting solution, PeroxiClear ("Test" solution), when used by habitual Clear Care users to bilaterally clean and disinfect their soft contact lenses, for approximately 2 weeks. METHODS This was a 2-week, open-label, bilateral eye study designed to include subjects ranging in age from 1...

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