When the microscope gets close to an eye during surgery, the images may get blurry due to the vapor coming off from the eye to the lens. Our Kohnspirator connects to a tube and serves as a mouthpiece to a vacuum pump in place near the eye to remove that vapor.

Works with most tubes
3.59 x 1.35 x 5.09 cm

3D-print files

If you don’t have a 3D printer, you can also purchase a ready-to-use Kohnspirator on Shapeways.

High efficiency

Kohnspirator keeps the lens fog-free during the entire surgery

Elegant design

The simple and minimalistic design will meet your expectations


No need to pay for expensive equipment since you can get Kohnspirator files for free and print them with any 3D printer in your area

Easy to install and use

Kohnspirator is easy to install and small to carry with you

Share with others

We at Custom Surgical aim at democratizing medical software. Therefore, we create a lo t of open source projects that you can use, totally free. Our Micro3D Kit allows you to download and 3D-print a system to capture imagery from both oculars of Leica microscopes totally free.

We would appreciate it if you could share information about our Micro3D to help more people get access to it and support our mission of democratizing medical equipment. Our Instagram account for tagging is @customsurgical.

Download Micro3D kit files for free!

Drop us your email and we’ll send you files that you can print Micro3D with any 3D printer.



    Check out our store on Shapeways for 3D-print products. Also, you can check Kohnspirator on Github.