Objective: this work aimed at assessment of the damage to the RNFLT by the suction time during LASIK.PATIENTS & METHODS: 45 were subjected to LASIK followed by OCT & VF in this study in the research institute of ophthalmologyResults: there was a highly significant reduction in the inferior & superior quadrants. There was also a highly significant difference in myopic patients >-7D.Conclusion: LASIK has a deleterious effect of 7% as a whole on the RNFLT. Especially on the inferior and superior quadrants and on patients with myopia >-7D.