The estimate of postmortem interval (PMI) is one of the most significant and complex research topics in the field of forensic medicine. Finding convenient, objective, and accurate methods to estimate PMI has always been a problem that urgently needs to be solved. Ocular tissues can be stored for a long time during corpse decomposition due to protection of eyelids, orbital wall, and outer dense connective tissue [1]. Therefore, the use of changes in postmortem ocular tissues in determining PMI has been increasingly recognized by scholars [2-4]. The postmortem corneal becomes cloudy and wrinkled over time due to the gradual degeneration and necrosis of corneal cells, irregular thickening of corneal stroma, and water evaporation [5].