Căutare în Webster - Dicționarul explicativ al limbii engleze

Pentru căutare rapidă introduceți minim 3 litere.

 

ASTIGMATISM - Definiția din dicționar

Traducere: română


Notă: Puteţi căuta fiecare cuvânt din cadrul definiţiei printr-un simplu click pe cuvântul dorit.

A*stig"ma*tism (&unr_;), n. [Gr. 'a priv. + &unr_;, &unr_;, a prick of a pointed instrument, a spot, fr. &unr_; 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.
[1913 Webster]

&hand_; 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.
[1913 Webster]