Data Exchange Guarantee Print
In many countries EMR systems are used for more than 20 years. The experience with EMR systems in these countries did show that within the first 3 years approx. a third (36%) of the ophthalmologists had to change their system (e.g. vendor went out of business, user was unhappy with the SW etc.). See publication by the International Ophthalmic Technology Association (

To guarantee the future use of the patient data base when changing the EMR/EHR system the CDE-EC  standard (Clinical Data Exchange-Eye Care) was develeoped which allows the data export to another system independent from the vendor. This standard is based on the official German HIT standard (BDT-A).
The standard is provided free of charge and part of the legal framework: view standard or visit the IOTA website