Monitoring intraocular pressure (IOP) is a vital thing of eye care and is essential for maintaining optimal eye health. The fluid pressure inside the eye is called intraocular pressure, and disorders like glaucoma and vision loss can result from elevated levels. Professionals in the field of eye care use a useful instrument called a tonometer to measure IOP with accuracy. Further, tonometers are essential for the early identification of glaucoma, allowing for prompt treatment and maintaining vision. Additionally, they provide a painless and non-invasive process, making patients comfortable and promoting routine checkups. In this article, we will look at the advantages of an IOPen tonometer for measuring intraocular pressure.