You should adjust your own intraocular distance to adapt your hand-held planetarium to your personal needs.
How does it work? By measuring and entering the intraocular distance: Use the PD-ruler to measure your personal intraocular distance and enter the measurements separately.
Why should I measure the intraocular distance?
The intraocular distance (or interpupillary distance) describes the distance of the pupil centre to the bridge of the nose. When looking through an optical instrument, both eyes should work together. Only when this distance is correct, can you enjoy relaxed viewing and optimally utilize the ability for stereo viewing. This measuring method enables accuracies of up to 1mm. Your advantage: The eye does not need to make any compensating movements and you can enjoy relaxed, far-distant viewing. And this even over a longer period of time. The Universe2go hand-held planetarium shows you the 3D-images in especially high quality. Overall, this method once again enhances the fun of observing.
Your PD measuring ruler is available here for downloading.