The Tonopen (TOP) was introduced in the 80s, it is a portable device with a replaceable latex head, easy to use. , However there are multiple factors that can distort the Goldmann tonometry results, such as corneal thickness, corneal curvature, and patient accommodation, as well as being a test with a certain subjective component. , The Goldmann applanation tonometry (GAT) was introduced since 1957, and it is considered the gold standard that estimates the IOP as the force required to flatten the cornea, derived from the Imbert-Fick principle. , Screening for the early stages of glaucoma could be based on the evaluation of patients with ocular hypertension, bearing in mind that IOP reduction is the mainstay of treatment, and several studies have shown effectiveness in reducing the rate in the progression of the disease. , It is a prevalent disease in all races however, there is a special predisposition in some racial groups, such as black people and the Latin American population This is due to the fact that in these breeds a greater amount of pigment is deposited in the trabecular meshwork that does not allow the normal flow of aqueous humor and consequently raises IOP. Glaucoma is the most common cause of irreversible blindness in the world, associated with increased intraocular pressure (IOP), without being an obligatory condition. Concordance between Goldmann, Icare Pro®, Corvis ST® and Tonopen® tonometry, and their correlation with corneal thickness. How to cite this URL: Mendieta PH, Puerto ML, Goyeneche FG, Guacaneme AC. How to cite this article: Mendieta PH, Puerto ML, Goyeneche FG, Guacaneme AC. Keywords: Corvis ST, glaucoma, Goldmann, Icare Pro, intraocular pressure, tonometer, tonometry, tonopen Univariate analysis was performed and a mean age 52.2 (SD ± 13.87) and mean IOP were obtained for Goldman 15 (SD ± 2.94), Icare 15 (SD ± 2.47), Tonopen 14 ( SD ± 2.85), Corvis 14 (SD ± 2.67). Results: 109 eyes (59 patients) were included, 66% women and 34% men. An univariate analysis was applied, and then a concordance analysis was performed in which the intraclass correlation coefficient (ICC) was calculated between the different instruments taking into account the corneal thicknesses to eliminate confounding effect in measurements. Methods: One hundred and eight eyes were selected (59 patients) who underwent IOP measurement with four instruments (Icare, Corvis, Tonopen and Goldmann). Introduction: The objective is to evaluate the concordance of intraocular pressure (IOP) values by comparing three tonometers Corvis ST (COR), Icare Pro (ICA) and Tonopen (TOP) with the gold standard, the Goldmann applanation tonometry (GAT and the effect of the measurements by the central corneal thickness (CCT).
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