Fig. 8From: Development of a novel multifocal lens using a polarization directed flat lens: possible candidate for a multifocal intraocular lensOptical bench test (monofocal lens). This figure shows USAF resolution of target images taken with a monofocal lens. With the monofocal lens, the image was sharpest (in focus) when the distance between the USAF target and Badal lens was 25 mm (0 D), but the images quickly became blurry when it was out of focusBack to article page