11. He would be left, however, with spherical aberration which is just as damaging to image sharpness. 12. Lenses in which both spherical aberration and coma are minimised are called " bestform " lenses. 13. The reason for improved depth of focus in conventional lenses is linked to residual spherical aberration . 14. Most eyes show positive spherical aberration when unaccomodated with a trend toward negative spherical aberration on accommodation. 15. All optics on the first wheel have an aspheric profile to correct for the Hubble spherical aberration . 16. Aspherical intraocular lenses ( IOLs ) have been used clinically to compensate for positive corneal spherical aberrations . 17. Most eyes show positive spherical aberration when unaccomodated with a trend toward negative spherical aberration on accommodation. 18. Spherical aberration limits the resolution of a 7 mm pupil to about 3 arcminutes per line pair.19. This is done by rotating elements that are inside of the lens to create deliberate spherical aberration . 20. In particular, spherical mirrors exhibit spherical aberration .
