How does a corneal thickness of 600 micrometers affect Goldmann applanation tonometry readings?

A corneal thickness of 600 micrometers is considered above the average normal range, which typically falls between 500 to 550 micrometers. In the context of Goldmann applanation tonometry, it is essential to understand how corneal thickness can influence intraocular pressure (IOP) readings.

When the cornea is thicker than average, it can lead to falsely elevated IOP readings during tonometry. This occurs because a thicker cornea can absorb more force during the applanation process, resulting in a higher tonometric reading than what is the true IOP. Therefore, to obtain an accurate assessment of the patient’s intraocular pressure, the readings should be adjusted down accordingly.

By accounting for the increased thickness, clinicians can ensure that they interpret IOP levels correctly, helping to avoid misdiagnosis or inappropriate treatment decisions. Thus, in cases where the corneal thickness is 600 micrometers, the IOP readings should be regarded as inaccurate and adjusted downward to reflect the true pressure within the eye.