Figure 1: Comparison of Pap restaining methods. a. Control 1 b. Control 2 c. Optical clearing agent, 3 min d. Optical clearing agent, 5 min e. Optical clearing agent, 10 min f. Optical clearing agent, 20 min g. Optical clearing agent, 30 min h. Optical clearing agent, 30 min i. Optical clearing agent, 60 min.