Ophthalmologists can choose from a range of the latest devices for measuring intraocular pressure (IOP), each with its own strengths and weaknesses, according to Yvonne Buys, MD.
While new technology continues to emerge, nothing has yet to replace the Goldmann applanation tonometer, said Dr. Buys, who gave an overview of tonometer technology. Dr. Buys is professor, Department of Ophthalmology and Vision Sciences, University of Toronto, Canada.
"The Goldmann remains the gold standard," Dr. Buys told Ophthalmology Times. "But you need to have another device to measure IOP when you can't use the Goldmann."
Multiple limitations have spurred researchers to develop alternatives. Variations in the cornea–such as corneal thickness, curvature, elasticity or rigidity, and hydration–can influence Goldmann readings.