Main purpose of this article is to explain Pachymetry, which is a Significant Process in Ophthalmology. Pachymetry is a significant procedure in detecting first stages of glaucoma and also treating the identical. The process aims at measuring the corneal thickness in patients which could impact the intraocular force. Pachymetry is a process where the thickness of this cornea is measured. It is done using a medical device called Pachymeter. The process can be executed by using either optical or ultrasonic methods. There are several uses of pachymetry in the field of ophthalmology.