PHARMACEUTICAL COMPOSITION, PREPARATION METHOD THEREFOR AND APPLICATION THEREOF

A pharmaceutical composition, a preparation method therefor and an application thereof. The pharmaceutical composition comprises the following components: a compound represented by formula I, hydroxypropyl methyl cellulose, benzalkonium chloride, and a pH regulator. The pharmaceutical composition can be used for preparing drugs for preventing or treating cataracts. The pharmaceutical composition has excellent stability in respect of exposure to light and to high temperatures, can be stored at room temperature, is convenient for patients to use, has pH and osmotic pressure close to those in the intraocular environment, is uniform in particle size distribution, and thus can give the patients good comfort.