International Accounting Standard 33 (IAS 33), adopted and revised by the International Accounting Standards Board, prescribes principles for the determination and presentation of earnings per share to enhance performance comparisons across entities and periods. The standard mandates that entities disclose earnings per share in accordance with its guidelines and details the measurement for both basic and diluted earnings per share, including adjustments for various financial instruments. IAS 33 aims to provide clarity and reduce inconsistencies in reporting earnings per share, improving transparency for stakeholders.