Do not hesitate to contact us
if you have any questions

We are ready for your enquiries:
Institute of Optometry
Riggenbachstr. 16
4600 Olten
Schweiz
Telephone support Monday and Wednesday at:  +41 61 383 72 75.

Continuous advice on BTSO

The weekly Zoom exchange for registered BTSO users will start in April. If you are interested, please register by e-mail: info(at)btso.ch


Starter-Box BTSO

Here you will find a list of all the materials required for BTSO testing and possible sources of supply: Penlight near and LED distance / Thorington card near and distance / Red glass Maddox rod combination/ Flipper ±2.0 dpt.
BTSO Zubehör Liste

Templates of the Thorington card “Far” for self-printing:
DIN A4 Download
DIN A3 Download

Register directly


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