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Optom Vis Sci. 2009 Jul;86(7):868-74. doi: 10.1097/OPX.0b013e3181adfdff.

Effects of monochromatic aberration on visual acuity using adaptive optics.

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  • 1Beijing Tongren Eye Center, Beijing Tongren Hospital, Capital Medical University, Beijing, China.

Abstract

PURPOSE:

To investigate the effect on visual acuity of correcting specific Zernike aberrations.

METHODS:

Visual acuity was tested for 12 young subjects using a Freiburg Acuity Test procedure under conditions with wavefront aberrations corrected by an adaptive optics system. The adaptive optics system consists of a Hartmann-Shack wavefront sensor, a deformable mirror, relevant optical channels and closed loop control system. Five aberration correction paradigms were used to correct different Zernike terms.

RESULTS:

With the second order aberration fully corrected, a significant improvement in visual acuity was observed (0.056 logMAR, t = 2.79, p = 0.018). Further correction of third order Zernike aberrations resulted in an additional improvement of 0.041 logMAR (t = 2.63, p = 0.023). But an additional correction of spherical aberration did not produce a significant increase in visual acuity (t = 1.10, NS). Full correction of aberrations achieved the best visual acuity with an improvement of 0.022 logMAR (t = 2.46, p = 0.032). The visual acuity was found to increase with the root mean square values of the residual aberrations with a linear relationship (r = 0.63, p < 0.0001).

CONCLUSIONS:

Correction of monochromatic wavefront aberrations improves visual acuity for normal eyes and the improvement of visual acuity is proportional to the change of root mean square of wavefront aberrations.

PMID:
19521271
[PubMed - indexed for MEDLINE]
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