Traumatic pupil dilation of 6mm may cause glaucoma, but it may not. The main cause of traumatic pupil dilation of 6 mm is due to paralysis of the pupillary sphincter caused by an ocular contusion. Pupil dilation is not directly related to glaucoma. If the patient had a shallow anterior chamber before the injury, there is a possibility of glaucoma secondary to the dilated pupil. However, if the patient has a deep anterior chamber, pupil dilation will not cause glaucoma to develop. If the patient’s pupil is dilated and there is damage to the atrial angle, such as a receding or torn atrial angle, it will cause the outflow of aqueous humor to be blocked and cause the patient’s intraocular pressure to rise, which in turn will cause glaucoma to occur. It is recommended that patients with ocular trauma seek prompt medical attention to evaluate their condition and follow the doctor’s instructions for treatment.