GSTM1 and axial length measurement: The occurrence of AL was significantly associated with low ASA score (U = 3205, z = − 2.452, p = 0.014), open operation (p = 0.006), long operation time (p <  0.001), abnormal level of postoperative albumin (p <  0.001), hemoglobin (Hb) (p = 0.015), C-reactive protein (CRP) (p <  0.001), C-reactive protein to albumin ratio (CRP/ALB ratio) (p <  0.001) and prognostic nutritional index (PNI) (p = 0.034).