Another way of attracting the buyers is that if the eye test is made free if they buy the Lens and frame in that shop. A special room with eye testing equipment is available in every spectacle shop. This is one of the latest innovative technique adopted in all places of the world. The salesman is fully equipped with the knowledge of testing and giving computer generated report on the power of the eyes. Any lens with power can be put to use only for maximum two years and the old lens may not fit the same type of frame as the models of frames undergo change. Thus change of frame with new design and the lens power, the market for lens and frame is always subject to change.
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