Therefore, this study was designed in order to show whether there is a relationship between TAS or TOS and PEX and determine the changes in the levels of matrix metalloproteinases (DEC and TN-C), TAS, and TOS in aqueous humor and serum in cataract patients with unilateral PEX material and in cataract patients who do not have unilateral PEX material. Here, TNC is linked to cataract.