Technology of aspherical lenses.
نویسندگان
چکیده
منابع مشابه
Effect of Spherical Aberration on the Optical Quality after Implantation of Two Different Aspherical Intraocular Lenses
PURPOSE To compare the effect of spherical aberration on optical quality in eyes with two different aspherical intraocular lenses. METHODS 120 eyes of 60 patients underwent phacoemulsification. In patients' eyes, an aberration-free IOL (Aspira-aA; Human Optics) or an aberration-correcting aspherical IOL (Tecnis ZCB00; Abott Medical Optics) was randomly implanted. After surgery, contrast sensi...
متن کاملChange in corneal aberrations after cataract surgery with 2 types of aspherical intraocular lenses.
PURPOSE To study the effect of cataract surgery through 3.2 mm superior incisions on corneal aberrations with 2 types of monofocal intraocular lenses (IOLs) with an aspherical design. SETTING Instituto de Optica, Consejo Superior de Investigaciones Científicas, and Fundación Jiménez Díaz, Madrid, Spain. METHODS Corneal topography of 43 eyes was obtained before and after small corneal incisi...
متن کاملHigher order aberration comparison between two aspherical intraocular lenses: MC6125AS and Akreos advanced optics.
AIM To compare higher order aberrations in two aspherical intraocular lenses (IOLs): Akreos advanced optics (AO) and Dr. Schmidt Microcrystalline 6125 aspheric anterior surface (MC6125AS) with each other. METHODS Forty eyes of 39 patients underwent phacoemulsification and Akreos AO and MC6125AS were implanted in their eyes in a random manner. Three months post-operatively, higher order aberra...
متن کاملInformation Technology Value Through Different Normative Lenses
The influence of IT investments on organizational performance is revisited. Bounded rationality, organizational controls, and political forces may constrain optimal selection of inputs and appropriate substitution between inputs. For example, firms may not be able to attain an optimal level of IT by substituting IT for labor (for reasons such as pressure from the labor union). Besides estimatin...
متن کاملAspherical Manifolds*
This is a survey on known results and open problems about closed aspherical manifolds, i.e., connected closed manifolds whose universal coverings are contractible. Many examples come from certain kinds of non-positive curvature conditions. The property aspherical, which is a purely homotopy theoretical condition, has many striking implications about the geometry and analysis of the manifold or ...
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ژورنال
عنوان ژورنال: The Journal of the Institute of Television Engineers of Japan
سال: 1988
ISSN: 0386-6831,1884-9652
DOI: 10.3169/itej1978.42.937