The structure of the retinal blood vessels can be obtained by segmenting fundus images. A image gained through color photography or fluorescein angiography (FA). produced camera cause noise which reduce quality image. To noise, this research uses non-local means filter (NLMF). For texture analysis, study Gabor filters due to frequencies as same human visual system. process vessel is performed u...

AIMS To assess the clinical and fluorescein angiographic features of choroidal folds seen in association with papilloedema. METHODS In a retrospective study, the clinical data from a database on patients with choroidal folds (1963-97), including fundus photography and fluorescein angiography, from 32 patients (64 eyes) with choroidal folds in association with papilloedema were reviewed. The c...

Our application concerns the automated detection of vessels in retinal images to improve understanding of the disease mechanism, diagnosis and treatment of retinal and a number of systemic diseases. We propose a new framework for segmenting retinal vasculatures with much improved accuracy and efficiency. The proposed framework consists of three technical components: Retinex-based image inhomoge...

PURPOSE To evaluate the effects of ultrashort laser pulses from femtoseconds to nanoseconds on the retinas of live rabbit eyes and to determine the energy requirements for visible lesion development. METHODS The retinal effects of laser exposures were examined for laser exposures with pulsewidths ranging from 4 ns to 90 fs, with visible wavelengths of 532 nm for durations > 5 ps and 580 nm fo...

We report retinal structural changes of a 37-year-old man diagnosed with the concomitant occlusion of cilioretinal artery and central retinal vein. Comprehensive ophthalmological evaluation was performed, followed by spectral-domain optical coherence tomography (SD-OCT, Heidelberg), optical coherence tomography angiography (OCT angiography, Optovue Inc., Fremont, California, USA), fluorescein a...

A case of choroidal neurilemmoma is reported. After a period of clinical observation which included serial fundus photography and fluorescein angiography, during which time active growth was seen, the tumour was thought to be a malignant melanoma, and enucleation was considered the treatment of choice. Subsequent histological study revealed a neurilemmoma. Important points relating to the clini...