Implants refractive

Rao GP, O Brien C, Hicky-Dwyer M, Patterson A. Rapid onset bilateral calcific band keratopathy associated with phosphate-containing steroid eye drops. Eur J Implant Refractive Surg 1995 7 251-2. 

The dependence of PS porosity on doping density has been exploited to fabricate optical waveguides. Such structures require only a single variation of refractive index. If a p-type substrate with implanted p+ lines is anodized and partially oxidized, mesoporous lines of high refractive index are embedded in a low refractive index material. An obtained refractive index contrast between core and clad of 30% is promising for future applications [Tal2]. 

There is one important idea, the raison d etre of this book, that we should like to implant firmly in the minds of our readers scattering theory divorced from the optical properties of bulk matter is incomplete. Solving boundary-value problems in electromagnetic theory may be great fun and often requires considerable skill but the full physical ramifications of mathematical solutions are hidden to those with little knowledge of how refractive indices of various solids and liquids depend on frequency, the values they take, and the constraints imposed on them. Accordingly, this book is divided into three parts. 

Ponte F, C.illino S, Faranda F, et al. Intraocular dapiprazole for the reversal of mydriasis after cataract extraction with intraocular lens implantation. J Cataract Refract Surg 1991 17 785-789. 

Three basic types of cataract extraction are available intracapsular cataract extraction, exttacapsular cataract extraction with nuclear expression, and extracapsular cataract extraction with phacoemulsification-aspiration. Intraocular lens (lOL) implantation typically is performed at the time of cataract extraction to help correct postoperative refractive error. Extracapsular cataract extraction with phacoemulsification-aspiration is the predominant surgery today, whereas the relative numbers of planned extracapsular cataract extraction, and particularly intracapsular cataract extraction, procedures have diminished. 

The substitution of the crystalline lens for a transparent intraocular lens (lOL) has become an integral part of almost all cataract operations. Because the implantation of the lOL is done through a small incision, foldable lenses have been developed, some of which are PHEMA hydrogels (refractive index, 1.44 water content, 38%o) or HEM A copolymers with... 

Surgery to correct refractive errors for the improvement of visual acuity generally aims at changing the corneal curvature. Corneal tissue is mainly constituted of a network of natural collagen polymer with the void volume filled with a special type of aqueous saline solution. A wide variety of laser and nonlaser procedures, such as laser-assisted in situ keratomileusis (LA-SIK), laser-cut channels for intracorneal ring segment (ICRS) implantation, femtosecond lamellar keratoplasty (FLK), intrastromal vision correction, and corneal transplantation have been developed for refractive surgical correction [83, 84]. They include removal of corneal tissue from the surface, removal of corneal tissue from the interior or stroma, and alteration of the corneal mechanical properties to produce a refractive effect. The most popular by far are procedures based on excimer laser ablation of the corneal surface and/or stroma [85]. 

Copper nanoparticles have been synthesized in silica by 50 keV Cu ion implantation with doses of 8.0x10 ion/cm. N anoparticles were c haracterized by absorption band of surface plasmon resonance in the visible range. Metal nanoparticle composite glasses were analyzed by the Z-scan method at the IR wavelength of NdiYAG laser radiation 1064 nm. The third order nonlinear susceptibility in the analyzed medium with simultaneous nonlinear refraction and absorption were considered as complex values. It is suggested that the samples with nonlinear absorption is perspective ones for optical applications. 

Composite materials formed by nanometer-sized metal particles embedded in dielectrics have a growing interest o wing to the large values of fast optical Ken-susceptibility, whose real part is related to the intensity-dependent refractive index 2 [ ] Ion implantation has been shown to produce a high density of metal nanoparticles (MN) in glasses [2], The high-precipitate volume fraction and small size of MN leads to giant value of the [3]. This stimulates an interest in the use of ion implantation to fabricate nonlinear optical materials. 

Ravalico G, Tognetto D, Baccara F. Heparin-surface-modified intraocular lens implantation in eyes with pseudoexfoliation syndrome. J Cataract Refract Surg 1994 20 543-549. 

Arshinoff SA, Khoury E. HsS versns a balanced salt solution as a corneal wetting agent during rontine cataract extraction and lens implantation. J Cataract Refract Surg 1997 23 1221-1225. 

For a particular defect center, the oscillator frequency f is constant and therefore the defect concentration depends on W1/2 and OD. It is observed from Figure 9.11 that the rate of intrinsic defect creation in the implanted sample is higher than the one observed in as-deposited MgO films. In the as-deposited MgO samples, the numbers of F type centers are nearly 2.23 x 10 cm, whereas it increases to 9.42x10 cm" in the H+ implanted samples. Refractive index n=1.73 and the oscillator strength f of 0.8 are used to determine the number of defect centers Np (Henderson and Ding 1966). 

Refractive index as a function of wavelength for the H - and Li -implanted and annealed Regression fitting curve along with the curve for as-deposited films are also given for reference. 

Optical transmission spectra of the films irradiated with H+ ions are shown in Figure 9.13a. A maximum transmittance of about 75% is observed for the as-deposited film whereas the transmittance is decreased for the ion-implanted samples. From the transmittance data, the refractive index and extinction co-efficient are evaluated. The index of refraction value of n=2 and the extinction co-efficient value of nearly k=0 in the visible region is obtained and these values are typical of most of the spinel transparent conducting oxide (TCO) materials. 

Shirley, H.L. Chang, M.D. Gerald Lim, M.D. Secondary pigmentary glaucoma associated with piggyback intraocular lens implantation. Case report. J. Cataract Refract. Surg. 2004,30 (10), 2219-2222. 

Darzynkiewisz Z, Balazs EA. Effect of connective tissue intercellular matrix on lymphocyte stimulation. I. Suppression of lymphocyte stimulation by hyaluronic acid. Exp Cell Res 1971 66 113-123 Davison JA. Capsular bag distension after endophacoemulsification and posterior chamber intraocular lens implantation. J Cataract Refract Surg 190 16 99-108 DeLuise VP, Peterson WJ. The use of topical Healon tears in the management of refractory dry-eye syndrome. Ann Ophthalmol 1984 16 823-824... 

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