annular scotoma


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Related to annular scotoma: negative scotoma
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Noun1.annular scotoma - a circular scotoma surrounding the center of the field of visionannular scotoma - a circular scotoma surrounding the center of the field of vision
scotoma - an isolated area of diminished vision within the visual field
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They combine the advantages of lenticular and full aperture lens designs, and so result in thinner and lighter lenses with no distinct dividing line, no annular scotoma and improved optical performance.