IOP Lowering Effects of Topical Anesthetics Used Frequently in the Ophthalmology Clinic

Inclusion Criteria: * Subjects must be 19 years of age and older Exclusion Criteria: * Corneal diseases including corneal transplants, corneal dystrophies, or trauma to the cornea that may prevent reliable tonometry of either eye. * Intolerant to topical Proparacaine and Benoxinate * Pregnant or nursing * 18 years of age and younger. * Physical limitation preventing ability to obtain reliable intraocular measurements (e.g. difficulty positioning subjects in front of the slit lamp or inability to keep eyes open during the intraocular pressure checks).