A simple mathematical model of steady state  oxygen distribution subject to diffusive transport and non- linear uptake in a retinal cylinder has been developed. The approximate analytical solution to a reaction- diffusion equation are obtained by using series expansions. The computational results for the scaled variables are presented through graphs. The effect of the important parameters (1) d...

a 49 year old woman diagnosed as a cervical cancer patient, after receiving appropriate treatment experienced metastasis in her abdominopelvic cavity. after aggressive management, she was well for a while. however, she developed to a poor condition consisting of urologic, gastroenterological, hematologic and neurologic problems just in a short time. in the course of hospital she presented one s...

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During a 2-year period, 31 cases of a hereditary retinal degeneration in dogs bred in India were found mainly suspected for progressive retinal atrophy (PRA) with typical history of initial nyctalopia followed by hemeralopia. Out of 31 PRA suspected dogs, 8 dogs (26%) were from the age group of 1-5 years, 15 (48%) 6-10 years and the rest (26%) 11-15 years. The most predominant breed was Spitz (...

purpose: to report a case of acute retinal necrosis following herpetic encephalitis. case report: a 25-year-old male presented with pain and visual loss in his left eye. he had herpetic encephalitis 1 month prior to the visual symptoms. ophthalmologic examination and paraclinical evaluation disclosed acute retinal necrosis. conclusion: herpetic encephalitis may be a risk factor for acute retina...

the purpose of this study was to compare the anatomic and visual outcome of primary vitrectomy with scleral buckling in patients with retinal detachment following cataract surgery. fifty-six consecutive patients with retinal detachment after cataract surgery were randomly assigned to two treatment groups: standard scleral buckling and standard three-port deep vitrectomy. successful treatment wa...

Metastasis from breast cancer to other parts of the body is very common, but the spread of the tumor to pituitary gland, especially to infandibulum, is a rare presentation. At the time of pituitary metastasis, a majority of the patients have clinical and radiological evidence of the disease. It seems that the posterior area of the gland is the most common site of metastasis, probably due to hig...

Abstract. Given a lattice polytope, the secondary fan is a combinatorial structure on the space of all tropical polynomials supported on the polytope. We consider rationally weighted formal sums of cones in the secondary fan as an approximation to a tropical variety. By using tropical intersection theory, we are able to intersect these formal sums with point-condition-imposing hyperplanes. Form...

A proof is provided of a strong law of large numbers for a one-dimensional random walk in a dynamic random environment given by a supercritical contact process in equilibrium. The proof is based on a coupling argument that traces the space-time cones containing the infection clusters generated by single infections and uses that the random walk eventually gets trapped inside the union of these c...

background degenerative retinal diseases, including age related macular degeneration, glaucoma, and hereditary retinal dystrophies are major causes of blindness. the principal defect in these diseases is cell loss which is amenable to both cell based neuroprotective and neuroregenerative therapies. to briefly review the lines of research and potential candidates for cell based therapies among r...