iop Intraocular pressure measurement is influenced by corneal thickness, among other factors. Eyes with thin corneas tend to have pressures that are under-estimated by tonometry, while eyes with thick corneas tend to have pressures that are over-estimated.

Techniques such as pachymetry provide precise corneal thickness measurements. Pachymetry is a non-invasive procedure that uses ultrasound or optical devices to measure the central corneal thickness (CCT). This information is crucial for adjusting IOP readings accurately.

Fix IOP according to central corneal thickness. IOP correction table used for adjusting intraocular pressure based on central corneal thickness (CCT). In order to adjust the IOP, just apply the correction factor on the right column to the intraocular pressure obtained by your tonometer.

Purpose: To determine if the accuracy of the baseline prediction model for the development of primary open-angle glaucoma (POAG) in patients with ocular hypertension can be improved by correcting intraocular pressure (IOP) for central corneal thickness (CCT).

CCT and adjusted IOP measurement can influence glaucoma management in a clinical context. It helps attribute risk and hence aids patient management decisions. Measuring intraocular pressure (IOP) is well established, with the Goldmann Applanantion Tonometer (GAT) being the most widely used device.

Central corneal thickness (CCT) is known to affect the accuracy of intraocular pressure (IOP) measurements by applanation tonometry. 1,2 A thicker cornea requires greater force to applanate and, conversely, a thinner cornea is more easily flattened.

To attempt to improve accuracy of IOP measurements, it is still common practice to see ophthalmologists use the variable of CCT with correction factors to translate the measured IOP to an “adjusted” IOP; one that is thought best to reflect intracameral IOP.

CCT is even more unreliable as a correction factor for IOP if the cornea has been surgically modified, because both the CCT and the corneal biomechanics have likely been altered. In one study, 13 applanation tonometry produced both lower and higher IOP measurements postoperatively versus preoperatively, despite all subjects' having reduced ...

Objective: Central corneal thickness (CCT) has emerged as an important predictive factor for the develop-ment of glaucomatous damage. Although a child’s cornea reaches adult thickness by the age of 3, little has been reported about normal CCT measurements in eyes of children.

In our paper simultaneous IOP measurement by applanation and intracameral tonometry was performed. Assuming a normal CCT of 520 μm, an IOP correction for every 10 μm change in corneal thickness is recommended. But in the Ehlers paper, there are some confusing arguments.