![]() A number of systemic diseases also affect the retina. These include ocular diseases, such as macular degeneration and glaucoma, the first and third most important causes of blindness in the developed world. Thus, because of its architecture-dictated by its function-both diseases of the eye, as well as diseases that affect the circulation and the brain can manifest themselves in the retina. Throughout the paper, aspects of image acquisition, image analysis, and clinical relevance are treated together considering their mutually interlinked relationships.įirst known image of human retina as drawn by Van Trigt in 1853. A separate section is devoted to 3-D analysis of OCT images, describing methods for segmentation and analysis of retinal layers, retinal vasculature, and 2-D/3-D detection of symptomatic exudate-associated derangements, as well as to OCT-based analysis of ONH morphology and shape. Special attention is given to quantitative techniques for analysis of fundus photographs with a focus on clinically relevant assessment of retinal vasculature, identification of retinal lesions, assessment of optic nerve head (ONH) shape, building retinal atlases, and to automated methods for population screening for retinal diseases. Methods for 2-D fundus imaging and techniques for 3-D optical coherence tomography (OCT) imaging are reviewed. Following a brief overview of the most prevalent causes of blindness in the industrialized world that includes age-related macular degeneration, diabetic retinopathy, and glaucoma, the review is devoted to retinal imaging and image analysis methods and their clinical implications. While a number of other anatomical structures contribute to the process of vision, this review focuses on retinal imaging and image analysis. Private and NHS patients can also benefit from this technology for a small supplement.Many important eye diseases as well as systemic diseases manifest themselves in the retina. If you are on the Rawlings vision plan then this is included as part of the examination. Private and NHS patients can also benefit from either full OCT imaging or just a digital retinal photograph for a small supplement.Ĭontact or visit one of our practices for more information. If you are on the Rawlings Vision Plan digital imaging is included as part of the examination. These pictures are a far more detailed record than could ever be described in written words. This makes it much easier to detect small changes or health problems at an early stage. Digital images are a snapshot in time giving a permanent record which can be compared with other images taken later. Traditionally Optometrists would write notes and draw diagrams to record information whilst examining the eyes. Over time certain conditions can affect the eyes. When taking OCT images in conjunction with a photograph, you will see red lines moving in front of you which is the image capture of the many layers at the back of the eye. Observation of the photographic image allows us to view blood vessels on the retina, the macula and the optic nerve. You sit in front of a special camera and in a flash a digital image is obtained. The process is very quick and entirely painless. The photograph alone captures a surface view of the back of the eye, whilst the OCT captures the important 9 layers underneath the surface and digitally analyses and takes measurements. It allows us to closely monitor how key structures in the eye change over time. Observation of the image allows us to view blood vessels on the retina, the macula and the optic nerve. Enhanced Reading Lenses and Occupational Progressive Lensesĭigital retinal photography has been superseded by Ocular Coherence Tomography (OCT), a sophisticated process which using our Nidek RSDUO OCT includes the capturing of a digital retinal photographic image that allows our Optometrists to take a detailed examination of the back of your eye.Book a Hearing or Wax removal Appointment.
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