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In the framework of computer assisted diagnosis of diabetic retinopathy, a new algorithm for detection of exudates is presented and discussed. The presence of exudates within the macular region is a main hallmark of diabetic macular edema and allows its detection with a high sensitivity. Hence, detection of exudates is an important diagnostic task, in which(More)
This paper addresses the automatic detection of microaneurysms in color fundus images, which plays a key role in computer assisted diagnosis of diabetic retinopathy, a serious and frequent eye disease. The algorithm can be divided into four steps. The first step consists in image enhancement, shade correction and image normalization of the green channel.(More)
OBJECTIVE To establish the sequence of events leading from vitreofoveal traction to full-thickness macular hole formation. METHODS Both eyes of 76 patients with a full-thickness macular hole in at least 1 eye were examined by biomicroscopy and optical coherence tomography. RESULTS Sixty-one fellow eyes had a normal macula. Optical coherence tomograms(More)
PURPOSE To report the use of optical coherence tomography (OCT) for evaluation of diffuse diabetic macular edema (DME) before and after vitrectomy. DESIGN Interventional case series. METHODS A retrospective study was made of 15 consecutive eyes of 13 patients that had vitrectomy for diffuse DME and OCT preoperatively and postoperatively. In seven eyes(More)
PURPOSE To use optical coherence tomography (OCT) to characterize the intraretinal changes associated with macular edema (ME) according to its etiology. DESIGN Observational case series. METHODS Seventy-eight eyes of 78 patients with ME were examined retrospectively by OCT, using the Humphrey 2000 OCT system (Humphrey Co., San Leandro, California). ME(More)
With the increased prevalence of retinal pathologies, automating the detection of these pathologies is becoming more and more relevant. In the past few years, many algorithms have been developed for the automated detection of a specific pathology, typically diabetic retinopathy, using eye fundus photography. No matter how good these algorithms are, we(More)
PURPOSE To define the normal retinal thickness in healthy subjects using optical coherence tomography (OCT) mapping software and to assess the ability of OCT to detect early macular thickening in diabetic patients. METHODS Six radial scans centered on the fixation point were done on 60 healthy eyes and 70 eyes of 35 diabetic patients without macular edema(More)
OBJECTIVE To evaluate prospectively the efficacy and safety of 1 intravitreal injection of 4 mg of triamcinolone acetonide for refractory diffuse diabetic macular edema. DESIGN Interventional case series. PARTICIPANTS Fifteen patients with bilateral diabetic macular edema unresponsive to laser photocoagulation. In all patients, one eye received the(More)
OBJECTIVE To assess the reproducibility of retinal thickness measurement using commercially available mapping software of optical coherence tomography (OCT). METHODS Six radial scans, 6 mm long and centered on the fixation point, were performed on 10 eyes of 10 healthy volunteers and 10 eyes of 10 diabetic patients with clinically significant macular(More)
PURPOSE To examine the preoperative and postoperative anatomical features of the macula using optical coherence tomography in patients who underwent surgery for epiretinal membrane and to correlate these features with functional results. METHODS In a noncomparative interventional series, 62 eyes of 62 consecutive patients operated on for an idiopathic(More)