Optics: eye examining – vision testing and correcting – Eye examining or testing instrument – Objective type
Reexamination Certificate
2000-12-08
2003-04-15
Manuel, George (Department: 3737)
Optics: eye examining, vision testing and correcting
Eye examining or testing instrument
Objective type
C351S246000
Reexamination Certificate
active
06547391
ABSTRACT:
FIELD OF THE INVENTION
The invention relates to ocular aberration correction. In particular, the invention provides correction of wavefront aberrations of the eye that take into account fluctuations in the aberrations due to biophysical rhythms.
BACKGROUND OF THE INVENTION
Techniques and apparatuses for measuring the aberrations of the eye using wavefront sensors are known. The known devices measure, estimate, interpolate, or calculate the ocular optical wavefront. Subsequently, the aberration measurements are mathematically converted to a height difference providing an elevation map above and below a designated mean sphere value, known as the optical path difference. Correction for the aberrations may be provided by introduction of an optical path difference, or aberration inverse filter, that offsets the distortions due to the ocular aberrations. These corrections may be incorporated into the design of an ophthalmic lens to provide visual acuity correction.
A disadvantage of correcting aberrations based on wavefront measurements is that the fluctuations of the aberrations over time caused by biophysical rhythms are not taken into account. Therefore, a need exists for a method of accounting for biophysical rhythms in designing ophthalmic lenses based on wavefront aberration measurements.
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Hofer, Heidi et al., “Dynamics of the Eye's Wave Aberration,” University of Rochester, USA.
H. Hofer, et al.: “Dynamics of the Eye's Wave Aberration”; Journal of the Optical Society of America—A, Optical Society of America, Mar. 2001, pp. 497-506, vol. 18, No. 3, XP001041247 ISSN: 0740-3232, Washington US.
Charman W. N. et al.: “Fluctuations in Accommodation: a review”, Ophthalmic & Physiological Optics, Apr. 1988, pp. 153-164, vol. 8, No. 2, XP008002504 ISSN: 0275-5408, UK.
PCT International Search Report PCT/US01/48245 dated Apr. 25, 2002.
Braswell Tammie M.
Rice Brian G.
Ross, III Denwood F.
Gianneschi Lois A.
Johnson & Johnson Vision Care Inc.
Manuel George
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