2021 Abstract: The computer programs TRACK_TEST and TRACK_VISION were previously developed to model profiles and optical appearances of tracks developed in solid-state nuclear track detectors. The programs were based on a track development model that involved the bulk etch rate Vb and the track etch rate Vt or the V function (i.e., Vt/Vb). The present work reported our work to update and modify these two programs. In the revised TRACK_TEST, two new V functions were added and enabled. Sample results for the CR-39 detector obtained using the three original and the two new V functions were compared. Discrepancies were within ~10% and [removed]1 MeV, respectively. Another major revision of TRACK_TEST was to enable calculations for the Makrofol detector. In the revised TRACK_VISION, the two new V functions, as well as the option for the Makrofol detector, were also added. The experimental results on the Makrofol detectors were obtained (irradiated with 3.6-MeV alpha particles under normal incidence and then etched to achieve a removed detector thickness of 30 µm) for comparisons with the modeled results using the revised TRACK_VISION. The track diameters obtained from the experiment and model were 24.7 and 23.2 µm, respectively. Moreover, a bright area in the central parts, together with an outer dark ring, were present in both the simulated and experimental tracks. The track-opening diameters and the general optical appearances of the tracks were in good agreement info:eu-repo/semantics/article https://phaidrabg.bg.ac.rs/o:29027 doi:10.3390/polym13040560 ISSN: 2073-4360 eng All rights reserved Updates to TRACK_TEST and TRACK_VISION computer programs Keywords: Optical appearance; Solid-state nuclear track detectors; SSNTDs; Track development; Track profile application/pdf 447548 bytes Polymers 13(4) Nikezic, Dragoslav Stajic, Jelena M. Yu, Kwan Ngok