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Aim: During laparoscopic surgery (LC), intracranial pressure increases due to factors such as pneumoperitoneum (PP) and Trendelenburg position (TP). Measurement of the optic nerve sheath diameter is an important indicator of intracranial pressure. In this study, we compared the optic nerve diameter measurement (ONSD) during laparoscopic surgery in obese and normal weight individuals.Material and Methos: The search included 99 ills who underwent laparoscopic surgery at Malatya Training and Research Hospital. Optic nerve sheath age measurements were performed preoperatively, post-intubation, post-pneumoperitoneum, and post-extubation in obese (n: 50) and control group (n: 49) patients who underwent laparoscopic surgery. Additionally, operation information and demographic data were recorded.Result: We included 99 patients in the study. The data analysis we obtained in this study showed that although ONSD values were similar between the groups at T0 and T1 (p>0.05), they were wider in obese individuals at T2 and T3 (respectively p <0.001, p=0.044). In the within-group analysis; although there was an increase compared to T0 in the obese group at T1 and T2, there was a decrease compared to T2 at T3 (p<0.001). In normal-weight patients, the within-group measured T-times were similar to those in the obese group. In the statistical analysis performed using the SPSS 23.0 statistical package, Skewness and Kurtosis test, t-test, Mann-Whitney U test and ANOVA were used.Conclusion: Results of the analysis of research data; PP and TP in LC Cause increased intracranial pressure. In order to prevent possible complications, it is important to provide lower PP pressure, keep the operation time as short as possible, and keep EtCO2 within normal limits by making mechanical ventilator adjustments.