Richard W. Bowman

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PURPOSE To compare the corneal higher-order aberration (HOA) after Descemet's stripping automated endothelial keratoplasty (DSAEK) and penetrating keratoplasty (PKP), and in age-matched controls. DESIGN Cross-sectional, non-comparative interventional case series. PARTICIPANTS Thirty-one eyes of 28 patients who underwent DSAEK, 20 eyes of 16 patients who(More)
OBJECTIVE To determine the reliability of intraocular pressure (IOP) measurements by Goldmann applanation tonometry and pneumotonometry in eyes treated with excimer myopic photorefractive keratectomy (PRK). DESIGN A prospective case series. PARTICIPANTS Forty consecutive eyes treated with PRK were evaluated. INTERVENTION AND MAIN OUTCOME MEASURES(More)
The phenomenon of light's momentum was first observed in the laboratory at the beginning of the twentieth century, and its potential for manipulating microscopic particles was demonstrated by Ashkin some 70 years later. Since that initial demonstration, and the seminal 1986 paper where a single-beam gradient-force trap was realized, optical trapping has(More)
PURPOSE To evaluate the efficacy of the aspheric optic of the AcrySof IQ SN60WF intraocular lens (IOL) in decreasing spherical and total higher order aberrations and improving contrast sensitivity after cataract surgery compared to the spheric AcrySof SN60AT. METHODS Fifty-two eyes of 36 patients were evaluated at the University of Texas Southwestern(More)
OBJECTIVE To evaluate the role of in vivo corneal tandem scanning confocal microscopy (TSCM) in the definitive diagnosis of suspected Acanthamoeba keratitis (AK). DESIGN Noncomparative interventional single-institution case series. METHOD A retrospective case review of patients consecutively referred with suspected AK and undergoing corneal TSCM was(More)
Computational imaging enables retrieval of the spatial information of an object with the use of single-pixel detectors. By projecting a series of known random patterns and measuring the backscattered intensity, it is possible to reconstruct a two-dimensional (2D) image. We used several single-pixel detectors in different locations to capture the 3D form of(More)
Conventional cameras rely upon a pixelated sensor to provide spatial resolution. An alternative approach replaces the sensor with a pixelated transmission mask encoded with a series of binary patterns. Combining knowledge of the series of patterns and the associated filtered intensities, measured by single-pixel detectors, allows an image to be deduced(More)
PURPOSE To identify key independent variables in estimating corneal refractive power (KBC) after hyperopic LASIK. DESIGN Retrospective study. PARTICIPANTS We included 24 eyes of 16 hyperopic patients who underwent LASIK with subsequent phacoemulsification and posterior chamber intraocular lens (IOL) implantation in the same eye. METHODS Pre-LASIK and(More)
In a variety of settings it is extremely helpful to be able to apply R functions through buttons, sliders and other types of graphical control. This is particularly true in plotting activities where immediate communication between such controls and a graphical display allows the user to interact with a plot in a very effective manner. The tcltk package(More)
Coupling noble metal nanoparticles by a 1 nm gap to an underlying gold mirror confines light to extremely small volumes, useful for sensing on the nanoscale. Individually measuring 10 000 of such gold nanoparticles of increasing size dramatically shows the different scaling of their optical scattering (far-field) and surface-enhanced Raman emission (SERS,(More)