Astigmatism

Astigmatism (astigmatism)
n.	((?))
Astig"matism
[Gr. 'a priv. + (?), (?), a prick of a pointed instrument, a spot, fr. (?) to prick: cf. F. astigmatisme.] (Med. ** Opt.)*

A defect of the eye or of a lens, in consequence of which the rays derived from one point are not brought to a single focal point, thus causing imperfect images or indistinctness of vision.

&fist] The term is applied especially to the defect causing images of lines having a certain direction to be indistinct, or imperfectly seen, while those of lines transverse to the former are distinct, or clearly seen.

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The dictionary's 1913 edition of the 1900 International, renamed Webster's Revised Unabridged Dictionary, has in modern times been used in various free online resources, as its copyright lapsed and it became public domain.
- Wikipedia

Astigmatism

Why Donate?

Donate Using PayPal

Donations from Outside of the United States

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News: care

The dictionary's 1913 edition of the 1900 International, renamed Webster's Revised Unabridged Dictionary, has in modern times been used in various free online resources, as its copyright lapsed and it became public domain. - Wikipedia

Astigmatism

Why Donate?

Donate Using PayPal

Donations from Outside of the United States

Donations by Other Methods

News: care

The dictionary's 1913 edition of the 1900 International, renamed Webster's Revised Unabridged Dictionary, has in modern times been used in various free online resources, as its copyright lapsed and it became public domain.
- Wikipedia