نتایج جستجو برای: monofocal lenses
تعداد نتایج: 13725 فیلتر نتایج به سال:
PURPOSE To evaluate the value of magnetoencephalography (MEG) source localization in localization of epileptic activities and predicting surgical outcome in frontal lobe epilepsies (FLE). METHODS Forty-six patients with presurgical MEG evaluation and intractable FLE surgery (28 male patients) were analyzed retrospectively with a mean follow-up of 5 years. Dipole analysis was performed for MEG...
The appearance of images through a multifocal intraocular lens (IOL) was simulated. The optical transfer function (OTF) of a model eye containing the multifocal lens was measured and divided by the OTF of the model eye with a monofocal IOL. This ratio was used to filter digital images, generating simulations that represent the retinal images seen through a multifocal intraocular lens when viewe...
• The phenomenon of "sensitization" of the heart to sympathomimetic amines by hydrocarbon anesthetics has been the subject of numerous investigations. Early studies concerned mainly the development of ventricular fibrillation as a result of sensitization of the heart by chloroform. More recently, interest has centered around the less severe cardiac arrhythmias resulting from small doses of symp...
Purpose Multifocal intraocular lenses (IOLs) can be associated with unwanted visual phenomena, including halos. Predicting potential for halos is desirable when designing new multifocal IOLs. Halo images from 6 IOL models were compared using the Optikos modulation transfer function bench system and a new high dynamic range (HDR) system. Materials and methods One monofocal, 1 extended depth of...
AIM To determine whether eyes implanted with the Lenstec KH-3500 "accommodative" intraocular lenses (IOLs) have improved subjective and objective focusing performance compared to a standard monofocal IOLs. METHODS 28 participants were implanted monocularly with a KH-3500 "accommodative" IOL and 20 controls with a Softec1 IOL. Outcome measures of refraction, visual acuity, subjective amplitude...
PURPOSE To compare the optical performance of 6 presbyopia-correcting intraocular lenses (IOLs) of different designs (accommodating or multifocal and aspheric or spheric). SETTING Alcon Laboratories, Inc., Fort Worth, Texas, USA. METHODS The optical performance of 6 IOLs were compared using modulation transfer function (MTF) and the United States Air Force 1951 Resolution Target (AFT) testi...
background: wearing spectacles is the most common approach in correcting the refractive errors worldwide. due to harmful effects of overexposure to solar ultraviolet radiations, the usage of multi-layer coatings in ophthalmic lenses has recently been increased. these lenses can reduce the reflections and hence increase the transmission of visible light; they can also decrease the transmission o...
Background & objective: The aim of this study was to investigate the knowledge and use of contact lenses by high school female students in Zanjan in 2003. Materials & Methods: The designed questionnaire was randomly distributed among the high school female students. Then the questionnaire’s questions were standardized based on the study. The main sample size was 700. The samples were selected o...
نمودار تعداد نتایج جستجو در هر سال
با کلیک روی نمودار نتایج را به سال انتشار فیلتر کنید