A stigmometric card, also known as a telestereograph or a stigmatometer, is a device used in the field of optometry to measure the astigmatism of an individual's eyes. This instrument assists eye specialists in determining the extent and orientation of astigmatism, which is a common refractive error. Although there aren't many synonyms for the term "stigmometric card", it can occasionally be referred to as a stigmatometer or telestereograph. These terms essentially describe the same device used for the same purpose and are often used interchangeably by opticians and eye doctors. To conclude, while alternative terms exist, the most widely recognized synonym for a stigmometric card is a stigmatometer or telestereograph.