The purpose of this study was to determine whether or not the measurement of intraocular pressure in an eye with a corneal graft resulted in a significantly different value using applanation versus Schiøtz tonometry. Pertinent data were collected from a series of cases in which unilateral keratoplasty was performed for a variety of corneal diseases, such as trauma, ulcers, infections, familial dystrophies, Fuchs' dystrophies, and keratoconus. Applanation and Schiøtz tonometry was performed on both eyes using the intact, non-operated eye as a control for each specific patient. Consideration was given to factors which are known to cause alterations in ocular rigidity in order to eliminate such patients from this series.
Buxton JN, Riechers RJ, Aaron SD. Corneal Grafts and Their Effect Upon the Applanation Schiøtz Disparity. Arch Ophthalmol. 1971;86(1):28–30. doi:10.1001/archopht.1971.01000010030007