In the sight of difficulty in segmentation of armor plate surface defects, visual attention mechanism is applied to segment defects images of steel strip surface, the key step of visual attention mechanism-fusion method of saliency images is improved, thinking of the contribution of salient area size, number and distribution to the comprehensive salient image, gray level consistency and GLCM’s ...

TOPICAL DIAGNOSIS OF OPTIC CHIASMAL LESIONS TOPICAL DIAGNOSIS OF RETROCHIASMAL VISUAL FIELD Visual Field Defects DEFECTS Etiologies of the Optic Chiasmal Syndrome Topical Diagnosis of Optic Tract Lesions Masqueraders of the Optic Chiasmal Syndrome Topical Diagnosis of Lesions of the Lateral Geniculate Body Pathophysiology of the Optic Chiasmal Syndrome Topical Diagnosis of Lesions of the Optic ...

Purpose of the study was to compare Rarebit Perimetry (RP) with Standard Automatic Perimetry (SAP) in patients with ischemic retrochiasmal lesions. Seventeen patients with homonymous hemianopia underwent SAP and RP. Correlation between the two techniques was evaluated, congruent defects were quantified in the spared hemifield and residual vision areas were investigated in the blind hemifield. A...

The occipital lobe is the endpoint of the visual pathway and the part which is most fully concerned with vision. This paper will first describe the anatomy of the occipital lobe including functions of cell types, topographical retinal representation, and vascular supply. A detailed discussion of the clinical manifestations of occipital lobe lesions including patient symptoms, visual field defec...

PURPOSE To report the clinical data and visual outcomes after treatment of patients with dysthyroid optic neuropathy (DON). METHODS We retrospectively reviewed the medical records and orbital images of 40 patients (65 eyes) with DON and analyzed the visual outcomes after treatment with intravenous steroids pulse therapy, radiotherapy and orbital decompression. RESULTS The study included 21 ...

PURPOSE Several visual field defects can be seen in empty sella syndrome (ESS). In this study, the authors aimed to evaluate the visual field defects in patients with ESS by rarebit perimetry and to compare the results with Humphrey perimetry. METHODS Left eyes of 13 patients with ESS and left eyes of 15 age-matched normal subjects were included in the study. Visual field testing was performe...

Objective identification of minor visual field defects is problematic. A possible solution is to examine spatial correlations by means of relative dispersion analysis, a tool of fractal analysis. We studied patients with glaucoma, previous optic neuritis, chiasmal compression and lesions of the brain hemispheres, using high-pass resolution perimetry. One-hundred visual field records were drawn ...

Visual field defects result from postgeniculate lesions. It is generally assumed that absolute defects are caused by total destruction or denervation of primary visual cortex (V1) and that the degraded but conscious vision that remains or returns in relative or partial defects is mediated by compromised V1 cortex that retains a sufficiently large population of functional neurons. We here report...

Congenital ocular colobomas are the result of a failure in closure of the embryonal fissure. They are important causes of childhood visual impairment and blindness. A 22 year old female patient with no particular history complaining of blurred vision of left eye; Visual acuity of the left eye is limited to counting finger; examination of the anterior segment was unremarkable. At fundoscopy, a l...

PURPOSE To evaluate the clinical efficacy of morselized amniotic membrane and umbilical cord tissue (MAU) in treating refractory corneal epithelial defect in ocular cicatricial diseases. METHODS Retrospective review of four patients with ocular cicatricial diseases treated with topical MAU for corneal epithelial defects refractory to conventional treatments including topical lubricants, autol...