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Objective: Phacoemulsification (Phaco) surgery is one of the most common and modern methods for treatment of cataracts. Educational video can be used to educate patients in a short time in various surgeries. This study aims to assess the effect of educational videos on preoperative anxiety in patients candidates for phaco surgery Methods: This is a clinical trial conducted on 160 patients candidates for phaco surgery who were selected using a simple random sampling method. They were divided into two groups of intervention and control after signing a written consent form. The intervention was a short educational video (10 minutes) about the nature of cataract disease, how to perform phaco surgery and pre- and post-operative care. Data collection tools were a demographic form and Spielberger’s State-Trait Anxiety Inventory. Collected data were analyzed in SPSS v. 23 software using descriptive statistics and independent t-test and paired t-test. Significance level was set at 0.05. Results: The mean age of patients in the intervention and control groups was 58.63±7.68 and 62.32±9.15, years respectively. The mean scores of overt and covert anxiety at baseline were 48.92±4.86 and 50.97±6.27 in the intervention group and 48.88±8.35 and 46.31±7.80 in the control group, respectively. After intervention, these scores were 37.95±7.04 and 44.20±6.79 in the intervention group and 48.72±7.46 and 44.10±8.23 in the control group, respectively. There was a statistically significant difference in overt and covert anxiety before and after the intervention in the intervention group (P=0.0001). Moreover, there was a statistically significant difference in overt and covert anxiety after the intervention between the two study groups (P=0.0001). Conclusion: he use of short educational videos seems to reduce overt and covert anxiety in candidates for phaco surgery. Nursing staff are recommended to teach patients by educational videos, and necessary facilities should be provided for nurses to interact with patients and educate them.

The Effect of Educational Video on Anxiety Before Surgery of Patient's Candidates for Eye Surgery by Fico Method