Starting in 1978, the principle of wavefront measurement and compensation of wavefront aberrations was adopted at the University of Heidelberg for ophthalmic applications. These image distortions impair the visual acuity even in patients with normal vision (20/20 visual acuity) considerably. Result in considerable distortions to the retinal image as a considerable part of the light is transmitted through marginal areas of the human eye, away from the optical axis. 5–7 mm diameter resulting in increased importance of higher-order aberrations (Fig. , the pupil of the human eye dilates to approx. Under these conditions higher-order aberrationsĪre limited so that a sharp retinal image is formed. 2–3 mm diameter, so that the light travels essentially along the optical axis of the human eye (Fig. The pupil of the human eye is small, e.g. These aberrations are unique for the very particular eye of the patient. Indeed the optical system of the human eyeĪs a genuine optical system generates more complex distortions to the retinal images, the so-called higher-order aberrations However, such corrections were limited to the compensation of only the lower order aberrations such as myopia, hyperopia, or regular astigmatism. Of the human eye were corrected by glasses, contact lenses and recently with excimer laser surgery. The same technology can be used to correct the ocular imperfections Most of the technology was developed in association with research towards anti-missile defense systems The speckle patterns of the star images could be improved towards diffraction-limited performance. By applying adaptive optical closed-loop controls That occurred when light traveling through the atmosphere entered an optical telescope. It was used to measure wavefront distortions Was originally developed nearly 50 years ago for astronomical applications.
0 Comments
Leave a Reply. |
AuthorWrite something about yourself. No need to be fancy, just an overview. ArchivesCategories |