Astigmatoscope
an instrument for determining the presence and severity of .
astigmatoscope as·tig·mat·o·scope (ās’tĭg-māt’ə-skōp’) or a·stig·mo·scope (ə-stĭg’mə-skōp’)
n.
an instrument for detecting and measuring the degree of astigmatism.
a·stig’ma·tos’co·py (-tŏs’kə-pē) or as’tig·mos’co·py (-mŏs’kə-pē) n.
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examination by means of an astigmatoscope.
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also called astigmia [uh-stig-mee-uh] /əˈstɪg mi ə/ (show ipa). ophthalmology. a refractive error of the eye in which parallel rays of light from an external source do not converge on a single focal point on the retina. optics. an aberration of a lens or other optical system in which the image of a point is […]
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moving or , especially with much activity or excitement: the field was astir with small animals, birds, and insects. up and about; out of bed. historical examples but, then, it was so early that not many even of the early-rising farmers were astir. ruth fielding in the red cross alice b. emerson the child was […]
- Astmh
astmh american society of tropical medicine and hygiene