astigmia

English

Etymology

From a- (negative prefix) + Ancient Greek στίγμα (stígma, “mark, point”) + -ia.

Pronunciation

• (US) IPA^(key): /əˈstɪɡmiʌ/
• Hyphenation: a‧stig‧mi‧a

Noun

astigmia (usually uncountable, plural astigmias)

1. (dated) astigmatism
   • 1925, Elmer LeRoy Ryer, “General Principles” (chapter 1), in Ophthalmometry‎^[1], Optical Publishing Company, page 3:

     […] and the measurement and correction of astigmia is one of the chief functions of the optometrist.

   • 1897, American Journal of Ophthalmology, page 312:

     Astigmia of the whole eye […] is the resultant of the special astigmia of all four refracting surfaces, […]

   • 1910, John Elmer Weeks, A Treatise on Diseases of the Eye, page 648:

     Regular astigmia must be considered congenital, as a rule.

   • 1898, Ophthalmic record, page 604:

     When the corneal astigmia is direct, and about 0.75 D., we may expect to find an almost total absence of astigmia by subjective examination.