higher order aberration


Also found in: Dictionary, Thesaurus, Legal, Encyclopedia.

higher order aberration

In ophthalmology, a refractive error that cannot be corrected by bending light into the eye with eyeglasses or contact lenses.
See also: aberration
References in periodicals archive ?
In 2011 May, Prakash G et al, (1) conducted a study to evaluate the higher order aberrations and resultant bilateral wave front patterns in pediatric patients with idiopathic amblyopia at Cornea and Refractive Surgery Services, Rajendra Prasad Centre for Ophthalmic Sciences, All India Institute of Medical Sciences, Ansari Nagar, New Delhi, India.
Important higher order aberrations include coma, trefoil and spherical aberrations and they are measured by root mean square (RMS) value which represents the ocular aberrations in micrometers.
Advanced corneal surface ablation efficacy in myopia: changes in higher order aberrations.
Conclusion: In spite of excellent improvement in refractive error, significant amount of higher order aberrations were induced after WFO LASIK.
Dreher said research indicates that 70% of emmetropes and 90% of myopes have noticeable higher order aberrations that often affect absolute clarity of vision.
She added that this is particularly the case for subjects with impaired optical quality relating to an increase in intraocular light scatter and/ or increased higher order aberrations.
Furthermore, there is great interest in the benefit of correcting such aberrations in order to enhance visual quality; indeed, correction of higher order aberrations has been of prime interest in corneal refractive surgery techniques.
Epi-LASIK and wavefront diagnostics address two other key complications, such as stromal flap complications and higher order aberrations associated with current refractive laser procedures," explained Dr.
Previously, up to 20 percent of higher order aberrations that cause problems such as image fuzziness, glare sensitivity, and halos went undiagnosed.
Epi-LASIK and wavefront diagnostics address two key complications such as stromal flap complications and higher order aberrations associated with current refractive laser procedures," explained Dr.
Aberrations include refractive errors such as nearsightedness, farsightedness, and astigmatism, as well as other higher order aberrations such as spherical aberrations and coma, which can cause night vision problems, glare and halos.
Full browser ?