Optic disc measurement: a comparison of indirect ophthalmoscopic methods.
نویسندگان
چکیده
منابع مشابه
Ophthalmoscopic-Perspectively Distorted Optic Disc Diameters and Real Disc Diameters.
PURPOSE To investigate the difference between two-dimensionally measured disc diameters (DDs) based on fundus images and three-dimensionally measured DDs based on enhanced depth imaging optical coherence tomography (EDI-OCT). METHODS The DDs were three-dimensionally measured on EDI-OCT images of optic nerve heads and two-dimensionally measured on near-infrared reflectance fundus images in 90 ...
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Introduction: Glaucoma is the most common cause of blindness in some countries. In the meantime, the field of retinal image processing has been proposed in order to provide automatic systems for disease diagnosis. Among the methods of medical image processing, image segmentation is a process of identification and change in the display of an image. The objective of this study was to use t...
متن کاملEstimation of optic disc size using indirect biomicroscopy.
The use of the 90 dioptre fundus lens in conjunction with slit-lamp biomicroscopy as a method of estimating optic size was evaluated in a series of 37 patients. The measurements taken from the Haag-Streit slit-lamp were compared with values obtained planimetrically in order to assess a conversion factor and also the reliability of the method. This technique is a quick and easy method of obtaini...
متن کاملOphthalmoscopic evaluation of the optic nerve head.
Optic nerve diseases, such as the glaucomas, lead to changes in the intrapapillary and parapapillary region of the optic nerve head. These changes can be described by the following variables: size and shape of the optic disk; size, shape, and pallor of the neuroretinal rim; size of the optic cup in relation to the area of the disk; configuration and depth of the optic cup; ratios of cup-to-disk...
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ژورنال
عنوان ژورنال: British Journal of Ophthalmology
سال: 1995
ISSN: 0007-1161
DOI: 10.1136/bjo.79.10.910