*2.3.3.1.1.2 Phone microscopy*

Orth et al. developed a dual-mode smartphone microscope. The system uses a camera flash or ambient light for brightfield and darkfield imaging [99]. They devised a clip-on 3D-printed attachment that easily attaches to the smartphone as shown in **Figure 15**. A cell nuclei imaging of unlabeled cells, cattle sperm, and zooplankton were demonstrated with this system. Another phone microscopy device called MoleScope is a commercially available smartphone attachment for dermoscopy that allows the user to obtain magnified images of the skin with controlled lighting. The images can be stored and viewed on a computer using a web platform and can be shared with a dermatologist, thereby facilitating teledermatology [97].
