Even-number measurement bias with Goldmann applanation tonometry in patients with glaucoma and glaucoma suspects.

Clinical Relevance: Goldmann applanation tonometry is widely used for the diagnosis and management of glaucoma and its use is considered standard of care. However, the precision of this method may be reduced by a clinician tendency to round to even numbers.

Background: Studies have previously demonstrated an even-number measurement bias with Goldmann applanation tonometry during examination of a general patient population.