Design of a new 3D printed all-in-one magnetic smartphone adapter for fundus and anterior segment imaging

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Abstract
Purpose: To describe and validate a 3D-printed adapter tool which could be used with either a slit lamp or a condensing lens, interchangeable between devices through magnetic fastening, in order to provide physicians a quick, easy and effective method of obtaining clinical photos. Materials and Methods: Three specialists, with at least 4-year experience in ophthalmology, gave a rate of image quality obtained by our device and the diagnostic confidence grade. The 3 specialists conducted each 13 or 14 examinations with the smartphone and magnetic adapter. At the end of evaluation, they rated with the Likert scale the ease of use of the device in obtaining clinical images of the anterior segment and ocular fundus respectively. Results: Data of quality perception and confidence demonstrated high values not dissimilar to the “de visu” eye examination. Moreover the instrument we designed turned out to be very user friendly. Conclusion: Our adapter coupled with a modern smartphone was able to obtain 4k images and videos of anterior segment, central and peripheral fundus, in an easy and inexpensive way.

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