BACKGROUND A pterygium is a fibro-vascular, wing shaped encroachment of the conjunctiva on to the cornea. The prevalence rates ranges from 0.7 to 31% among different populations and also influenced by age, race, and exposure to solar radiations. Ultraviolet light-induced damage to the limbal stem cell barrier with subsequent conjunctivalisation of the cornea is the currently accepted aetiology ...

The use of split-thickness dermal grafts for successful repair of corneal and scleral defects is reported in 10 patients (11 eyes) who had non-infectious, impending, or overt ocular perforation. In all patients, traditional methods of reconstruction were deemed inappropriate or had already failed. Corneo-scleral defects occurred after various operations: pterygium excision, retinal detachment r...

We develop an evolutionary model of growth in which agents choose how to allocate their time between private and social activities. We argue that a shift from social to private activities may foster marketbased growth, but also generate social poverty. Within a formal framework that merges a game theoretic analysis of the evolution of social participation with a model of dynamic accumulation of...

Scleral contact lenses (ScCL) have gained renewed interest during the last decade. Originally, they were primarily used for severely compromised eyes. Corneal ectasia and exposure conditions were the primary indications. However, the indication range of ScCL in contact lens practices seems to be expanding, and it now increasingly includes less severe and even non-compromised eyes, too. All lens...

PURPOSE To establish a relationship between the diameter and depth position of vessels in the superior and inferior corneo-scleral limbus using ultra-high resolution optical coherence tomography (UHR-OCT). METHODS Volumetric OCT images of the superior and inferior limbus were acquired from 14 healthy subjects with a research-grade UHR-OCT system. Differences in vessel diameter and depth betwe...

PURPOSE To evaluate the performance of corneal topographic astigmatism (CorT) based on total corneal power measurements. METHODS Anterior, posterior, and total corneal power measurements of 526 virgin eyes obtained using the CSO Sirius tomographer (Costuzione Strumenti Oftalmici, Scandicci, Florence, Italy) were analyzed. Individual CorTs were created from each set of data. These CorTs were a...

The aim of this paper was to evaluate the ocular findings in patients with chronic renal failure (CRF) undergoing haemodialysis (HD). In 64 patients undergoing haemodialysis (30 female and 34 male), aged 24-83 years (mean 58 years) on haemodialysis 1-213 months (mean 47 months) complete ocular examination were performed: visual acuity (VA), intraocular pressure (IOP), biomicroscopic examination...

Examination.-The visual acuity in the right eye was 6/4 and that in the left 6/6. The right eye was moderately injected and examination revealed a very fine perforating wound of the cornea at 3 o'clock about 4 mm. in from the limbus. The slit lamp showed but few cells in the anterior chamber. The pupil dilated freely, the lens and vitreous were both clear, and no intra-ocular foreign body was v...

A research-grade OCT system was used to image in-vivo and without contact with the tissue, the cellular structure and microvasculature of the healthy human corneo-scleral limbus. The OCT system provided 0.95 µm axial and 4 µm (2 µm) lateral resolution in biological tissue depending on the magnification of the imaging objective. Cross-sectional OCT images acquired tangentially from the inferior ...

GANTEN, DETLEV, ANA MARQUIZ-JULIO, PIERRE GRANGER, KARL HAYDUK, KLAUS PETER KARSWNKY,ROGER BOUCWER, AND JACQUES GENEST. Renz'n ilz dog brain. Am. J. Physiol. 221(6): 17331737. 1971 .-Brain tissue of dogs contains high renin activity. After peritoneal dialysis in nephrectomized dogs for up to 12 days, levels of renin activity remain as high as in control dogs. Kenin substrate and angiotensin are...