Goldmann Applanation Tonometry vs. Kowa Hand-Held Applanation Tonometry: A Correlational Study.

The purpose of this study is to compare a hand-held applanation tonometer to a standard Goldmann applanation tonometer and determine the correlation between the two instruments. It is generally accepted that Goldmann tonometry is, at this point in time, the most reliable clinical measure of intraocular pressure. However, Schiotz tonometry is still the most common method of measurement of intraocular pressure when a portable instrument is necessary. A standard Goldmann applanation tonometer is not easily portable, yet it is important in situations such as glaucoma screenings, bed-ridden patients, or patients with physical limitations to have an accurate tonometer. Since Schiotz tonometry has the disadvantage of being subject to errors of greater magnitude and variety than the Goldmann applanation tonometer, a more accurate and reliable portable tonometer may be desirable.