نتایج جستجو برای: intracorneal ring segment

تعداد نتایج: 204631  

Journal: :Investigative ophthalmology & visual science 2007
Jason Jiang Harvinder S Gill Deepta Ghate Bernard E McCarey Samir R Patel Henry F Edelhauser Mark R Prausnitz

PURPOSE To test the hypothesis that coated microneedles can deliver drugs into the eye via intrascleral and intracorneal routes in a minimally invasive manner. METHODS Solid metal microneedles measuring 500 to 750 microm in length were coated with model drugs, protein, and DNA; inserted into nonpreserved human cadaveric sclera; and imaged. Microneedles coated with sodium fluorescein were then...

2015
Albert Daxer

PURPOSE To evaluate the biomechanics of corneal ring implants by providing a related mathematical theory and biomechanical model for the treatment of myopia and keratoconus. METHODS The spherical dome model considers the inhomogeneity of the tunica of the eye, dimensions of the cornea, lamellar structure of the corneal stroma, and asphericity of the cornea. It is used in this study for calcul...

Journal: :Investigative ophthalmology 1962
T W SERY A H PINKES R M NAGY

Ring reactions of the cornea have been given a new nomenclature based upon their mechanism of formation. The term immune corneal ring includes all types and distinguishes ring reactions from the general term, "anaphylactic" keratitis. The systemic immune ring, arising slowly from serum antibody ami cells at the limbus, is distinguished from the local immune ring, which rapidly develops at the "...

Journal: :Journal of refractive surgery 2001
D Z Reinstein S Srivannaboon S P Holland

PURPOSE To examine epithelial and stromal layers by three-dimensional very high-frequency (VHF) digital ultrasound scanning before and after implantation of Intacs (intracorneal ring segments [ICRS]). METHODS Three-dimensional scanning was performed in five eyes before and 3 months after Intacs insertion. Digital signal processing techniques provided high-resolution B-scan imaging and I-scan ...

2017
Majid Moshirfar Andrew E. Bean Jordan D. Desautels Orry C. Birdsong

INTRODUCTION This report describes the first known case of late-onset intrusion of an intrastromal ring segment into the anterior chamber due to posterior migration of a ring segment. To our knowledge, intrastromal ring segment penetration has only been shown to occur in the intraoperative or immediate postoperative period. We postulate that the perforation in this case is due to progressive th...

پایان نامه :وزارت علوم، تحقیقات و فناوری - دانشگاه سیستان و بلوچستان - دانشکده مهندسی برق و کامپیوتر 1391

this thesis is presented 10 ghz voltage controlled ring oscillator for high speed application. the voltage controlled ring oscillator was designed and fabricated in 0.13یm cmos technology. the oscillator is 7-stages ring oscillator with one inverter replaced by nand-gate for shutting down in the ring oscillator during idle mode. tri-state inverter was used to control of 126 bit vector in ri...

نمودار تعداد نتایج جستجو در هر سال

با کلیک روی نمودار نتایج را به سال انتشار فیلتر کنید