1) Condition 
In geometric optics, stigmatism refers to the image-formation property of an optical system which focuses a single point source in object space into a single point in image space. Two such points are called a stigmatic pair of the optical system. Many optical systems, even those exhibiting optical aberrations including astigmatism, have at least o...
The condition of having a stigma. ... Synonym: stigmatization. ... (05 Mar 2000) ... 
Type: Term Pronunciation: stig′mă-tizm Definitions: 1. The condition of having a stigma. Synonyms: stigmatization1
[n] - (optics) condition of an optical system (as a lens) in which light rays from a single point converge in a single focal point
noun normal eyesight
the property of a lens that is stigmatic. · a condition in which stigmata are present.