English to French Tech/Engineering Photography/Imaging (& Graphic Arts) matériel ophtalmologique

Follow-up photography function in XXXXXXX is as follows: the system
searches the same scan position as the last photographed data* by using the
live IR image of the present photography to decide the scan position.
* "The last photographed data" means the data photographed at the date in the
past. The data captured at the same date as the present photography is not
used for searching in Follow-up photography.