The Swiss company LANG-STEREOTEST AG was founded in 1982 with the purpose of launching the LANG-STEREOTEST I on the International market as well as promoting the development of other products, such as the LANG-STEREOTEST II, the LANG FIXATION CUBEs and the LANG FIXATION STICKs. From the foundation of the LANG-STEREOTEST® company, more than 100’000 LANG-STEREOTEST I and II were sold worldwide.
The LANG-STEREOTEST I has been produced and sold from 1982 until 2021. It was followed in 2018 by the LANG-STEREOPAD® and, in 2021, by the revised version, the LANG-STEREOTEST® I-R.
LANG-STEREOTESTS have been most distributed in Germany, France, Italy, the UK, the USA and Japan. Beside ophthalmologists and paediatricians, a very large and still increasing number of general practitioners and school doctors are regularly using the LANG-STEREOTEST® and its successors. Moreover, the LANG-STEREOTESTS have been established by health care policy makers and authorities of many countries as standard screening-tests for stereopsis, to detect cases of beginning or manifest amblyopia, in a wide range o populations, like preschool children, air pilots, fine industry workers, and more.
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