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Optics Letters

Optics Letters


  • Vol. 26, Iss. 10 — May. 15, 2001
  • pp: 746–748

Closed-loop adaptive optics in the human eye

Enrique J. Fernández, Ignacio Iglesias, and Pablo Artal  »View Author Affiliations

Optics Letters, Vol. 26, Issue 10, pp. 746-748 (2001)

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We have developed a prototype apparatus for real-time closed-loop measurement and correction of aberrations in the human eye. The apparatus uses infrared light to measure the wave-front aberration at 25 Hz with a Hartmann–Shack sensor. Defocus is removed by a motorized optometer, and higher-order aberrations are corrected by a membrane deformable mirror. The device was first tested with an artificial eye. Correction of static aberrations takes approximately five iterations, making the system capable of following aberration changes at 5 Hz. This capability allows one to track most of the aberration dynamics in the eye. Results in living eyes showed effective closed-loop correction of aberrations, with a residual uncorrected wave front of 0.1µm for a 4.3-mm pupil diameter. Retinal images of a point source in different subjects with and without adaptive correction of aberrations were estimated in real time. The results demonstrate real-time closed-loop correction of aberration in the living eye. An application of this device is as electro-optic “spectacles” to improve vision.

© 2001 Optical Society of America

OCIS Codes
(010.1080) Atmospheric and oceanic optics : Active or adaptive optics
(330.4460) Vision, color, and visual optics : Ophthalmic optics and devices
(330.5370) Vision, color, and visual optics : Physiological optics

Enrique J. Fernández, Ignacio Iglesias, and Pablo Artal, "Closed-loop adaptive optics in the human eye," Opt. Lett. 26, 746-748 (2001)

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