Moulakaki AI, Del Águila-Carrasco AJ, Esteve-Taboada JJ, Montés-Micó R. Effect of even and odd-order aberrations on the accommodation response.
Int J Ophthalmol 2017;
10:955-960. [PMID:
28730088 PMCID:
PMC5515153 DOI:
10.18240/ijo.2017.06.19]
[Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/21/2016] [Accepted: 03/07/2017] [Indexed: 11/23/2022] Open
Abstract
AIM
To investigate the potential effect that odd and even-order monochromatic aberrations may have on the accommodation response of the human eye.
METHODS
Eight healthy subjects with astigmatism below 1 D, best corrected visual acuity 20/20 or better and normal findings in an ophthalmic examination were enrolled. An adaptive optics system was used in order to measure the accommodation response of the subjects' eyes under different conditions: with the natural aberrations being present, and with the odd and even-order aberrations being corrected. Three measurements of accommodation response were monocularly acquired at accommodation demands ranging from 0 to 4 D (0.5 D step).
RESULTS
The accommodative lag was greater for the accommodative demands of 1.5, 3, 3.5 and 4 D for the condition in which the even-order aberrations were corrected, in comparison to that obtained for the natural aberrations and corrected odd-order aberrations for the same accommodation demands. No statistically significant differences were found between the accommodation responses under the three conditions.
CONCLUSION
The odd and even-order aberrations are not helping the visual system to accommodate, because their partial correction do not affect the accommodation performance.
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