Tehran University of Medical Sciences Immunology and Genetics Journal 2645-4831 9 3 2026 07 19 236 236 Ronak Cheraghzadeh Department of Pediatrics, Faculty of Medicine, TeMS.C., Islamic Azad University, Tehran, Iran Sina Fazeli Faculty of Medicine, Shiraz University of Medical Sciences, Shiraz, Iran Arezoo Chouhdari Social Determinants of Health Research Center, TeMS.C., Islamic Azad University, Tehran, Iran. Masoumeh Hematyar Department of Pediatrics, Faculty of Medicine, TeMS.C., Islamic Azad University, Tehran, Iran Sepideh Darougar Department of Pediatrics, Tehran Medical Sciences Branch, Islamic Azad University, Tehran, Iran 2026 06 18 2026 07 19 Background: Allergic eye disease is a common immunological hypersensitivity disorder, with an increased prevalence over the past several decades. Due to the “united airway disease” concept, a possible association between allergic rhinitis, asthma, and allergic conjunctivitis seems to be rational. This study was conducted to evaluate the occurrence of allergic conjunctivitis separately, in association with allergic rhinitis, and/or along with asthma. Method: A total of 194 patients with allergic rhinitis, who visited the Allergy Clinics of Tehran Islamic Azad University of Medical Sciences during the years 2024 and 2025, were included in this cross-sectional study to evaluate the existence of any accompanying allergic conjunctivitis, asthma, or sinusitis based on their self-report. Results: Among the 194 patients suffering from allergic rhinitis, 109 (56.2%) were male and 85 (43.8%) were female. The mean age of the patients participating in the study was 29.78 years (minimum: 18 years; Maximum: 72 years). 99 patients (51%) had conjunctivitis, 79 patients (40.7%) had sinusitis, and 81 patients (42%) self-reported asthma in their previous history. There was neither a significant relationship between the occurrence of allergic conjunctivitis and sinusitis nor between asthma and allergic conjunctivitis (p =0.873). Conclusion: To conclude, the results of this study confirm that symptoms of ocular allergy are common in patients with allergic rhinitis and it is higher in younger (18-40 years old) than older patients. The results also suggested that allergic conjunctivitis was a co-morbidity of other allergic diseases rather than a separate entity, at least in this study. https://igj.tums.ac.ir/index.php/igj/article/view/236