The most common adverse effect seen on day one of post-op cataract surgery that may require some form of treatment is ocular hypertension. It is essential to understand when and how to treat this condition to avoid a rare but serious complication of optic nerve damage and vision loss. Either inflammation typically causes this condition, or the ophthalmic viscosurgical device (OVD) used during surgery to keep the eye shape has left a small remainder of the gel on the ocular. Experts have come to the consensus that if the pressure is higher than 30 mm Hg, the patient should be treated. Also, if a patient has preexisting glaucoma or is currently experiencing eye pain, then they too should be helped. In this article, it goes into detail on how this condition can be treated. It is always best to consult with your doctor for any concerns after surgery.