 OR-PAM systems can typically achieve a lateral resolution of 0.2 to 10 μm, allowing OR-PAM to be classified as a super-resolution imaging method.At depths greater than 1 mm and up to 3 mm, acoustic-resolution photoacoustic microscopy (AR-PAM) is more useful due to greater optical scattering.Acoustic scattering is much weaker beyond the optical diffusion limit, making AR-PAM more practical as it provides higher lateral resolution at these depths.