What are the two common methods?

• A. IOP range and absolute target
• B. Percent reduction and IOP range
• C. Average IOP and Tmax
• D. Diurnal variation and Tmax

Answer: (B)

In glaucoma care, two common ways to set an intraocular pressure (IOP) target are the percent reduction from baseline and an IOP within a defined range.

The percent-reduction approach uses the patient's untreated or pre-treatment IOP as a starting point and aims to lower it by a chosen percentage, such as a 20–30% reduction. This is useful because baseline IOP varies between patients, so expressing the goal as a relative decrease provides a personalized standard for what counts as meaningful improvement.

The IOP-range approach establishes a target window, a minimum and maximum IOP that is considered acceptable for the patient. This accounts for individual susceptibility and natural diurnal fluctuations, ensuring the eye stays within a safe zone rather than hitting a single fixed number.

Other options mix concepts that aren’t the two commonly used primary methods for setting goals—diurnal variation or Tmax describe fluctuations, not a target framework; averages with Tmax aren’t the standard pair clinicians rely on for defining goals.