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Aims and objectives: During the new coronavirus disease 2019 (COVID-19) outbreak period, there was increasing presentation in the number of patients with acute primary angle closure (APAC). This study aimed to report the occurrence of APAC during the COVID-19 post-restriction period and investigate the related characteristics of these patients with APAC. Methods: This retrospective, multi-center study included consecutive patients seeking APAC treatment at two eye centers in China from December 7, 2022 to January 13, 2023 (post-restriction period) and from December 7, 2021 to January 13, 2022 (control period). Electronic medical records were reviewed, and ocular data of the affected eye(s) were analyzed for patients with unilateral or bilateral APAC. Information including COVID-19 related symptoms, medications used for COVID-19 infection, and living habits and emotions related to the COVID-19 outbreak during the post restriction period were collected using a questionnaire. Results: Overall, 189 (219 APAC eyes) and 51 (54 APAC eyes) patients with APAC were identified during the post-restriction and control periods, respectively. The patients identified during the post-restriction period were younger (P = 0.043) and had a longer duration from symptoms to treatment (P = 0.039), shorter axial length (P = 0.002), larger pupil diameter (P = 0.004), larger vertical cup disc ratio (P = 0.004), poorer mean deviation values (P = 0.003), and more glaucomatous optic neuropathy diagnoses (P = 0.032) compared with the patients with APAC identified during the control period. Among 151 included patients with APAC who completed the questionnaires, 130 patients with APAC were diagnosed with concurrent COVID-19 infection, of which 54 (41.5 %) had coughing and/or vomiting as the main symptoms. Of these, 89.2 % spent 0 h per day on outdoor activity; 44.6 % drank more water than usual, with 14.6 % drinking more than twice the amount of water than usual; 91.5 % used antipyretics; and 20.0 % had mood swings, including anxiety, depression, and tension, during the concurrent COVID-19 infection. Conclusion: In our study, a significant increase in the number of patients presenting with APAC with certain characteristics was observed during the COVID-19 post-restriction period. And whether COVID-19 symptoms, such as coughing and vomiting, and behavioral and psychological changes caused by COVID-19 infection contributing to the concurrence of APAC and COVID-19 recurrence require further investigation.