نتایج جستجو برای: scleral scar

تعداد نتایج: 17383  

Journal: :Archives of ophthalmology 2000
N Nakagawa J M Parel T G Murray K Oshima

BACKGROUND Partial thickness sclerectomy is the most commonly employed scleral shortening technique used in conjunction with pars plana vitrectomy in the repair of myopia-associated macular holes in patients with staphyloma. Recently, scleral shortening induced through scleral invagination has been advocated as an adjunct in retinal translocation surgery. OBJECTIVE To determine whether a corr...

Journal: :Investigative ophthalmology & visual science 2007
Hongli Yang J Crawford Downs Christopher Girkin Lisandro Sakata Anthony Bellezza Hilary Thompson Claude F Burgoyne

PURPOSE To delineate three-dimensionally the anterior and posterior surfaces of the lamina cribrosa, scleral flange, and peripapillary sclera, to determine the position and thickness of these structures within digital three-dimensional (3-D) reconstructions of the monkey optic nerve head (ONH). METHODS The trephinated ONH and peripapillary sclera from both eyes of three monkeys with early gla...

Journal: :Journal of the mechanical behavior of biomedical materials 2014
Rafael Grytz Massimo A Fazio Michaël J A Girard Vincent Libertiaux Luigi Bruno Stuart Gardiner Christopher A Girkin J Crawford Downs

To characterize the material properties of posterior and peripapillary sclera from human donors, and to investigate the macro- and micro-scale strains as potential control mechanisms governing mechanical homeostasis. Posterior scleral shells from 9 human donors aged 57-90 years were subjected to IOP elevations from 5 to 45mmHg and the resulting full-field displacements were recorded using laser...

Journal: :Eye & Contact Lens-science and Clinical Practice 2021

This case series examines the magnitude and regional variation in scleral lens–induced corneal edema postradial keratotomy (RK) eyes. Scheimpflug imaging was used to measure thickness across central 6 mm before after lens wear nine post-RK eyes (median age 64 years). Variations were examined as a function of distance from center (six 0.5-mm annuli) 0° 360°. The median 2.19% (interquartile range...

Journal: :Annals of optometry and contact lens 2022

A scleral contact lens lies on the sclera, not cornea, which differs from a rigid gas permeable (RGP) lens, and has shown successful clinical outcomes in patients unable to tolerate glasses or RGP lenses because of severely deformed cornea. In addition, forms tear film between cornea that stabilizes ocular surface could be useful therapeutic option. The mini-scleral is option for visual improve...

Journal: :The British journal of ophthalmology 1992
R J Leitch M A Bearn P G Watson

A 66-year-old man presented with massive bilateral scleral thickening and calcification associated with a unilateral exudative retinal detachment which did not respond to systemic anti-inflammatory agents including steroids and cyclophosphamide but improved with scleral resection. This patient shows the features of both posterior scleritis and the uveal effusion syndrome, providing further evid...

Journal: :Investigative ophthalmology & visual science 2000
N A McBrien P Lawlor A Gentle

PURPOSE Recent investigations have suggested that scleral thinning in mammalian eyes with axial myopia is a consequence of the loss of scleral tissue, rather than the redistribution of existing tissue as the eye enlarges. The present study investigated whether further changes in the distribution and metabolism of scleral tissue occur during the process of recovery from axial myopia. Scleral gly...

2013
Craig Boote Erin P. Dooley Steven J. Gardner Christina S. Kamma-Lorger Sally Hayes Kim Nielsen Jesper Hjortdal Thomas Sorensen Nicholas J. Terrill Keith M. Meek

PURPOSE To quantify long-term changes in stromal collagen ultrastructure following penetrating keratoplasty (PK), and evaluate their possible implications for corneal biomechanics. METHODS A pair of 16 mm post-mortem corneo-scleral buttons was obtained from a patient receiving bilateral penetrating keratoplasty 12 (left)/28 (right) years previously. Small-angle x-ray scattering quantified col...

Journal: :Eye & contact lens 2010
Muriel M Schornack Sanjay V Patel

PURPOSE To describe the use of Jupiter scleral lenses (Medlens Innovations, Front Royal, VA; and Essilor Contact Lenses, Inc., Dallas, TX) in the management of keratoconus. METHODS We performed a single-center retrospective chart review of our initial 32 patients with keratoconus evaluated for scleral lens wear. All patients were referred for scleral lens evaluation after exhausting other non...

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