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Background: Dental anxiety is a common problem for oral surgeries. This study investigated the effectiveness of wearing glasses with green lenses in reducing dental anxiety, blood pressure, heart rate, and intraoperative pain in patients undergoing first-time third-molar surgery., Methods: The authors planned this study as a randomized and parallel-group clinical trial. Patients' dental anxiety was measured with the use of a visual analog scale and a State-Trait Anxiety Inventory for baseline measurement purposes. At the same time, blood pressure, oxygen saturation, and heart rate values were recorded. Patients were given glasses with clear or green lenses, depending on their group. After 10 minutes, all parameters were measured again for preoperative measurement. Patients wore glasses with either green or clear lenses throughout the operation. After the operation, patients were asked to estimate the degree of intraoperative pain using the visual analog scale., Results: The study included 128 patients. On the basis of the change between baseline and preoperative measurements, the authors found a statistically significant difference in anxiety and heart rate. Intraoperative pain showed a significant difference between groups. No significant changes were found in blood pressure and oxygen saturation., Conclusions: Patients with anxiety could wear low-cost, easy-to-use glasses with green lenses for 10 minutes before an operation to reduce anxiety and heart rate. In addition, wearing glasses during the surgical procedure can reduce intraoperative pain., Practical Implications: By means of using glasses with green lenses throughout the procedure, existing anxiety and pain can be reduced. An operation can be performed more comfortably for both the patient and the dentist. This clinical trial was registered at ClinicalTrials.gov. The registration number is NCT05584696., Competing Interests: Disclosures None of the authors reported any disclosures., (Copyright © 2024 American Dental Association. Published by Elsevier Inc. All rights reserved.)