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M. V. Subbaram, I. G. Cox, N. Doble; Dynamics of the Iris AO Deformable Mirror in a Wavefront Aberrometer System. Invest. Ophthalmol. Vis. Sci. 2008;49(13):977.
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© ARVO (1962-2015); The Authors (2016-present)
To report the repeatability and dynamics of wavefront measurement and correction using a modified Bausch & Lomb Zywave I instrument incorporating an IRIS AO deformable mirror.
The instrument consists of a Zywave I aberrometer modified to incorporate an IRIS AO 37-segment, 3-micron stroke deformable mirror. Study 1 evaluated the repeatability of the instrument on model eyes (10 measurements) that were manufactured with known magnitudes of defocus and spherical aberrations. Study 2 involved introduction of different magnitudes of higher order aberrations (up to ± 1 micron in 0.1 micron increments) in the system to evaluate the dynamics of aberration correction using the deformable mirror.
For the model eyes, the standard deviation of all Zernike terms was 0.04 microns or less. Induction of defocus and higher order aberrations such as coma, trefoil and spherical aberration resulted in the measurement of a linear increase in the corresponding Zernike term (r > 0.97, p < 0.001) for both model eyes, with essentially no coupling between these and other higher order terms.
Incorporation of a deformable mirror in a wavefront sensor designed for measuring the wavefront aberration of the human eye provides a platform capable of investigating the impact of induced higher order aberrations without introducing an optical correction through contact lenses or surgery.
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