Steven M Verity

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The peripheral cornea is anatomically and physiologically distinct from its central counterpart. The major differences relate to the gradual transition of corneal tissues to those of the conjunctiva, episclera, and sclera; furthermore, the vascular structures, lymphatics, and inflammatory cells from these neighboring structures are intimately associated(More)
We investigated an individual macular corneal dystrophy (MCD) type II cornea from a 42-year-old woman with markedly reduced antigenic keratan sulphate levels. A characteristic 4.6 A X-ray reflection was evident, and the mid-stroma contained 30% less sulphur than normal. Close packing of collagen was restricted to the superficial stroma. Abnormally large(More)
PURPOSE To evaluate the severity of ocular involvement of patients with Stevens-Johnson syndrome (SJS), toxic epidermal necrolysis (TEN), and SJS/TEN overlap, and to investigate the relationship of the SCORTEN (a severity-of-illness score for SJS and TEN based on a minimal set of well-defined variables calculated within 24 hours of admission) with eye(More)
Newly devised software was used to compare the ability of the Topographic Modeling System-1 (Computed Anatomy, New York, NY) and the Corneal Analysis System (EyeSys Laboratories, Houston, Tex) to reproduce power measurements on spherical surfaces. Reproducibility results were compared for spheres of 40.00, 42.50, and 44.00 diopters. The program determines(More)
PURPOSE To assess the response of the cornea to hydrogel intracorneal lens (ICL) insertion or laser in situ keratomileusis (LASIK) with IntraLase (IntraLase Corp.) at the cellular level. SETTING Department of Ophthalmology, University of Texas Southwestern Medical Center, Dallas, Texas, USA. METHODS Twenty patients (29 eyes) were evaluated by in vivo(More)
Two computer-assisted topographic analysis systems were evaluated with calibrated spherical surfaces and normal human corneas. The Topographic Modeling System-1 (TMS-1) was found to be statistically more accurate in determining the power of calibrated spheres near the apex and at 1 mm from the apex than the Corneal Analysis System (CAS). The CAS, however,(More)
OBJECTIVE To evaluate the safety and efficacy of Intrastromal Corneal Ring Segments (ICRS) for the correction of myopia. DESIGN Nonrandomized, comparative trial. PARTICIPANTS Patients enrolled in the United States Food and Drug Administration phase II and phase III clinical trials of the ICRS had best spectacle-corrected visual acuity (BSCVA) of 20/20(More)
PURPOSE To derive regression-based formulas and identify essential dependent variables to estimate refractive corneal power after myopic laser in situ keratomileusis (LASIK). SETTING University of Texas Southwestern Medical Center at Dallas, Dallas, Texas, USA. METHODS A retrospective data review of 30 eyes (23 patients) having myopic LASIK followed by(More)
PURPOSE To evaluate the reversibility of refractive effect following removal of the ICRS (intrastromal corneal ring segments; Intacs). METHODS Data from 34 eyes from which ICRS were removed during United States FDA Phase II and III clinical trials were evaluated with regard to segment size, loss or change of best spectacle-corrected visual acuity (BSCVA),(More)
The antigenicity of intrastromal and epikeratophakia xenografts of lyophilized corneal tissue was evaluated in nonimmune and immune recipients. Lyophilized feline lenticules were implanted into intrastromal pockets in unsensitized rabbits and rabbits sensitized to the donor cat. In both cases, the grafts remained clear. Sensitized rabbits with clear(More)