The calibration of the Goldmann applanation tonometer should be checked at which settings?

The calibration of the Goldmann applanation tonometer is crucial for ensuring accurate intraocular pressure measurements. It is recommended to check the calibration at the settings of 0, 2, and 6 mmHg because these points cover a range that includes both the low and moderate pressures typically encountered in clinical practice. This specific check allows for the detection of any shifts or discrepancies in the tonometer's accuracy across a meaningful spectrum of pressures, which is essential for proper diagnosis and treatment planning in patients.

By verifying the calibration at these specified settings, practitioners can ensure the reliability of their measurements and, subsequently, the appropriateness of any treatment decisions made based on those measurements. This specific range is based on clinical standards and helps maintain the integrity of the tonometer's function across different pressure levels.