Evaluation of Refractive Outcomes in Patients Undergoing PRESBYOND Using the MEL90 Excimer Laser

"Participants will undergo laser eye surgery in both eyes using the PRESBYOND method. First, a thin flap is created on the surface of the eye using a femtosecond laser. Then, a second laser (excimer laser) reshapes the cornea to improve vision at near, intermediate, and far distances.~The treatment is similar to monovision techniques, where one eye is mainly corrected for distance and the other for near vision. However, PRESBYOND differs by adjusting the depth of focus in each eye individually, allowing the brain to better combine the two images in the intermediate range-this area is called the Blend Zone. This approach helps preserve natural binocular (3D) vision, contrast sensitivity, and depth perception. Most patients adapt well and quickly to this type of correction. The procedure is customized based on each patient's age and eye characteristics."