Effectiveness of Virtual Reality-Assisted Physical Therapy in the Acute Phase After Lumbar Disc Surgery

The goal of this clinical trial is to evaluate the effectiveness of virtual reality-assisted physical therapy in the acute postoperative period after lumbar disc surgery. The main questions it aims to answer are: * Does virtual reality-assisted physical therapy reduce pain more effectively than conventional physical therapy? * Does it improve functional recovery, pain threshold, and blood biomediator levels? * Does it reduce anxiety and kinesiophobia in the early rehabilitation period? Researchers will compare virtual reality-assisted physical therapy with standard physical therapy to determine whether virtual reality provides additional therapeutic benefits. Participants will: * Undergo standard postoperative physical therapy after lumbar disc surgery. * Some participants will additionally perform virtual reality-based rehabilitation exercises. * Be evaluated for pain severity, functional improvement, blood biomediators, pain threshold, and psychological outcomes.