noun
astigmatism
Technical term in optics and ophthalmology referring to a lens aberration or refractive error where rays fail to converge to a single focal point.
非点収差を補正するために、特殊なレンズが使われる。
Special lenses are used to correct astigmatism.
この望遠鏡は非
This telescope is designed to have low astigmatism.