RELATIONSHIP BETWEEN SERUM HOMOCYSTEINE LEVELS AND MANGANESE SUPEROXIDE DISMUTASE (MNSOD) ON RETINAL NERVE FIBER LAYER (RNFL) THICKNESS IN DIABETIC RETINOPATHY AND NON-DIABETIC RETINOPATHY PATIENTS. JIKKN. 2026;3(3):159-173. doi:10.62710/apvz7w98