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Learn Something about Progressive Lenses Peripheral Vision Loss
09:35, 2010-May-28
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Nothing is perfect in the world, so do progressive lenses. Thus, there exist some disadvantages of this sort of lenses with progressive lenses peripheral vision loss as a typical example. Progressive lenses peripheral vision loss: Because of the narrow vertical range of undistorted vision, there is an inherent loss of progressive lenses peripheral vision, as with all prescription spectacle lenses. This loss of peripheral vision and the resulting side vision distortion may result in the wearer not being able to see more than 25% of a computer display without having to move the wearer's head from side to side to clearly see and comprehend the monitor's content, however for wearers who use computers regularly and for prolongued periods of time, many optical practitioners recommend a progressive lens tailored specifically to the intermediate and near prescription for computer and reading use. Fitting: Progressive lenses require careful placement relative to the wearers pupil centre for a distance'-viewing reference position. Incorrect specification of the fitting location can cause problems for the wearer including narrow fields of view, clear vision in one eye only, on-axis blur, and the need to adopt uncomfortable head positions. There is no such thing as a perfect progressive lens, so the existence of progressive lenses peripheral vision is tolerant and acceptable. Leave a Comment { Last Page } { Page 88 of 93 } { Next Page } |
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