Intraocular pressure (IOP) refers to the fluid pressure inside the eye. Maintaining a normal IOP is crucial for eye health, as it helps preserve the shape of the eye and ensures proper functioning of ocular structures. Elevated IOP is a significant risk factor for developing glaucoma, a group of eye diseases that can lead to vision loss or blindness if left untreated. IOP can be measured during routine eye exams using specialized instruments. Factors influencing IOP include the production and drainage of aqueous humor, trauma, medications, and certain eye conditions. Regular monitoring is essential, especially for individuals at risk of glaucoma.