Fig. 6From: Development of a novel multifocal lens using a polarization directed flat lens: possible candidate for a multifocal intraocular lensDigital single-lens reflex (DSLR) camera test setting. To test the multifocal lens, a 4-mm pupil, focal length +/− 500 mm (+/− 2 D) PDF lens (provided by Professor Seok Ho Song), achromatic lens (focal length 100 mm), and a DSLR camera were usedBack to article page