I have discovered ametropia in the particular form of irregular astigmatism.    From Wordnik.com.  [Mr. World and Miss Church-Member A twentieth century allegory] Reference

Severe, usually congenital, mental deficiency. ametropia.    From Wordnik.com.  [xml's Blinklist.com] Reference

Incorporating patented HyperBond (TM) technology and HydrolEyes (TM) surface science, the SynergEyes (R) contact lenses with FDA market clearance include: SynergEyes (R) A for naturally occurring ametropia, targeting patients with astigmatism, current gas permeable lens wearers, and patients demanding optimized vision; the SynergEyes (R) Multifocal lens for presbyopia.    From Wordnik.com.  [THE MEDICAL NEWS] Reference