In situ high-temperature (T(a)=1050-1250 K) scanning tunneling microscopy was used to determine the coarsening and decay kinetics of two-dimensional TiN adatom and vacancy islands on atomically smooth TiN(111) terraces. We report the first observation of an abrupt decrease in decay rates, irrespective of T(a), of adatom islands with areas less than a critical value of 1600 A(2). However, no dec...

BACKGROUND Stickler syndrome, also known as hereditary progressive arthro-ophthalmopathy, is an inherited progressive disorder of the collagen connective tissues. Manifestations include short-sightedness, cataracts, retinal problems leading to retinal detachment and possible blindness. This is principally the case among individuals with type 1 Stickler Syndrome. It is the most commonly identifi...

Fourteen cases of primary retinal detachment after extracapsular cataract extraction and posterior chamber intraocular lens implantation were treated by scleral buckling surgery. Retinal reattachment was achieved in 100% of the cases. All eyes had a postoperative visual acuity of 6/30 or better; in six eyes the visual acuity was 6/12 or better. We attributed our high anatomical success rate to ...

purpose: to compare the safety, efficacy, and visual results of laser in situ keratomileusis (lasik) in eyes with and without previous scleral buckling surgery in the same individuals. methods: in a prospective clinical trial, 14 eyes of 7 patients with myopic refractive error and history of scleral buckling in one eye, underwent lasik surgery in both eyes according to a standard surgical proto...

purpose: to compare the success rate of adjunctive 5-fluorouracil (5-fu) and low molecular weight heparin (lmwh), and daunomycin in combination with triamcinolone during vitrectomy in eyes with retinal detachment (rd) and proliferative vitreoretinopathy (pvr). methods: in this prospective randomized clinical trial, 69 eyes from 69 patients with rd and pvr (grade b or c) randomized to 3 groups. ...

The Longmen Shan is the steepest topographic front at the India-Asia collision zone and the site of the Mw 7.9 Wenchuan earthquake. Here to explain the interseismic GPS velocities across the greater Longmen Shan region, we develop a boundary element model including earthquake cycle effects, topography, the westward dipping Beichuan Fault and a ∼20 km deep, shallowly dipping, detachment, inferre...

Superfast muscles power high-frequency motions such as sound production and visual tracking. As a class, these muscles also generate low forces. Using the toadfish swimbladder muscle, the fastest known vertebrate muscle, we examined the crossbridge kinetic rates responsible for high contraction rates and how these might affect force generation. Swimbladder fibers have evolved a 10-fold faster c...

“Treatment of retinal detachment associated with retinal holes should not be urged except in only eyes as a last clutch at a straw of hope”. These lines by Lister from 1927 and the famous survey by Vail a decade prior (1912), which found a success rate of retinal detachment (RD) as 1 in 1000 speaks for themselves, suggest a grave prognosis for RD. Although the current success rate in managing u...

introduction: there are different methods to repair retinal detachment. in this trial the retinopexy in repairmen of retinal regmatogenesis rd is compared with other methods in qazvin teaching hospitals during 1993-2003. methods: this out come study was conducted on 47 patients with s/b and retinal break cryopexy (group i) , 30 patients undergoing s/b with barrier laser photocoagulation around ...

PURPOSE This study was designed to evaluate the efficacy of fluid-gas exchange for the treatment of postvitrectomy retinal detachment. METHODS We retrospectively reviewed the records of 33 consecutive patients (35 eyes) who underwent fluid-gas exchange treatment for postvitrectomy retinal detachment using the two-needle pars plana approach technique. RESULTS The retinal reattachment rate wa...