background: different investigation showed that 5-methoxypsoralen and 8- methoxypsoralen reduce birth rates in the rats. objective: in this study we worked out the effect of methoxsalen together with ultraviolent a (uva) radiation on mature balb/c mice spermatogenesis. materials and methods: the ld50 standard was determined 160 mg/kg and the uva dose which causes erythema was calculated 0.046 j...

<p><strong>Background: </strong>Beta thalassemia is severe genetic blood disorder caused by mutation in the gene encoding for beta chains of haemoglobin and individuals with require life-long red cell transfusions to survive which leads hemosiderosis affects all organs body including eyes. The study aims ocular manifestations these children its correlation age serum ferritin l...

OBJECTIVE To estimate age- and gender-specific prevalences of ocular hypertension and open-angle glaucoma (OAG) in adult Latinos. DESIGN Population-based, cross-sectional study. PARTICIPANTS Six thousand three hundred fifty-seven Latinos 40 years and older from 6 census tracts in Los Angeles, California. METHODS The study cohort consisted of all self-identified Latinos of primarily Mexica...

BACKGROUND Primary open-angle glaucoma (POAG) is one of the leading causes of blindness in the United States and worldwide. Three to 6 million people in the United States are at increased risk for developing POAG because of elevated intraocular pressure (IOP), or ocular hypertension. There is no consensus on the efficacy of medical treatment in delaying or preventing the onset of POAG in indivi...

Semiclassical spectra weighted with products of diagonal matrix elements of operators A(alpha), i.e., g(alphaalpha')(E)= summation operator(n)/(E-E(n)), are obtained by harmonic inversion of a cross-correlation signal constructed of classical periodic orbits. The method provides highly resolved semiclassical spectra even in situations of nearly degenerate states, and op...

We implement different methods for the computation of the breakdown threshold of invariant attractors in the dissipative standard mapping. A first approach is based on the computation of the Sobolev norms of the function parametrizing the solution. Then we look for the approximating periodic orbits and we analyze their stability in order to compute the critical threshold at which an invariant a...

IN a paper on" Certain abnormal conditions of the macular region usually classed as colobomata," which appeared in this journal in *March, 1927, an attempt was made to classify congenital defects in the neighbourhood of the posterior pole and to provide some diagnostic points by means of which a rough idea of the time of origin and the mechanism of production of the abnormality might be gained....

BACKGROUND Single-fiber electromyography (SFEMG) abnormality in the extensor digitorum communis (EDC) was reported in ocular myasthenia gravis (OMG), which indicated subclinical involvement beyond extraocular muscles in OMG patients. The relationship between the abnormal findings of SFEMG in EDC and the probability for OMG to develop generalized myasthenia gravis (GMG) is unknown. This retrospe...