Antioxidant Effect of Flavonoids After Ascorbate/Fe2+-Induced Oxidative Stress in Cultured Retinal Cells11Abbreviations: Bme, Basal Medium of Eagle; Dcfh2, 2′,7′-Dichlorodihydrofluorescein; Ldh, Lactate Dehydrogenase; Pc, Partition Coefficient; Rf, Retardation Factor; Ros, Reactive Oxygen Species; Tba, Thiobarbituric Acid; and Tbars, Thiobarbituric Acid-Reactive Substances.