When is diurnal IOP highest?

IOP is typically highest in the early morning (6-8 AM) in most patients. However, 20-25% of glaucoma patients have peak IOP outside office hours. Diurnal curves (multiple measurements across the day) are helpful for treatment optimization.

What IOP target is recommended in glaucoma?

IOP target depends on baseline damage and progression risk. OHT/early glaucoma: target IOP =20% reduction. Moderate glaucoma: target <16-18 mmHg. Advanced/rapidly progressive: target <14-16 mmHg. Individualized based on optic nerve status.

How does corneal thickness affect IOP accuracy?

Goldmann tonometry overestimates IOP in thick corneas (CCT >580 microns) and underestimates in thin corneas (CCT <510 microns). Correction factor: approximately -0.7 mmHg per 10 micron increase in CCT above 520 microns.

IOP Goldmann Tonometry Diurnal Variation

Assess intraocular pressure (IOP) diurnal variation and peak IOP from Goldmann applanation tonometry. Normal IOP 10-21 mmHg; diurnal fluctuation >5-6 mmHg correlates with glaucoma progression risk.

Use the full interactive calculator below, or

IOP Goldmann Tonometry Diurnal Variation

Frequently Asked Questions

When is diurnal IOP highest?

What IOP target is recommended in glaucoma?

How does corneal thickness affect IOP accuracy?