Can a design from 1905 still be relevant in 2025?

29/09/2025

Can a design from 1905 still be relevant in 2025?

For the Schiötz tonometer, the answer is clear.

Even after more than 100 years, this mechanical instrument continues to deliver reliable intraocular pressure (IOP) measurements, especially in challenging cases like heavily scarred corneas.

Key principles that stood the test of time:

• Purely mechanical – no electronics required

• Fully independent from external power sources

• Robust and reproducible under standardized conditions