Method for determining cuvette shape correction value

The invention relates to a method for determining a cuvette shape correction value (F) of a laboratory analysis cuvette (10) filled with a liquid reagent (60) and having a transparent cuvette body (12) comprising a vertical wall (14) and a bottom wall (13), the method comprises the following method steps: determining a liquid reagent volume (V) of a liquid reagent (60) filled into the laboratory analysis cuvette (10), optically determining a liquid reagent level (H) of the liquid reagent (60) in the laboratory analysis cuvette (10) by means of a level determination camera (24), a horizontal internal width (D) of the laboratory analysis cuvette (10) is calculated by the electronic controller (26) as a function of the determined liquid reagent volume (V) and the determined liquid reagent level (H), and a shape correction value (F) is calculated by the electronic controller (26) as a function of the calculated horizontal internal width (D) and a reference internal width (D ') of the laboratory analysis cuvette (