Accuracy of the EyeSys 2000 in measuring surface elevation of calibrated aspheres

International Contact Lens Clinic

Volumn 25, Issue 6, 1998, Pages 171-177

  Horner, Douglas G ^a   Salmon, Thomas O ^b  

^a INDIANA UNIVERSITY   (United States)

^b NONE

Author keywords

Accuracy; EyeSys 2000; Videokeratoscopy; Wavefront calibration

Indexed keywords

EID: 0038896813     PISSN: 08928967     EISSN: None     Source Type: Journal    
DOI: 10.1016/s0892-8967(99)00005-x     Document Type: Article

References (20)

1. Loftin M.M. The continuing debate over elevation vs. radius of curvature data. Contact Lens Spectrum. 12:1997;43-49.
2. Roberts C. The accuracy of "power" maps to display curvature data in corneal topography systems. Invest Ophthalmol Vis Sci. 35:1994;3525-3532.
3. Roberts C. Characterization of the inherent error in a spherically-biased corneal topography system in mapping a radially aspheric surface. J Refract Corneal Surg. 10:1994;103-111.
4. Tripoli N., Cohen K., Holmgren D., et al. Assessment of radial aspheres by the arc-step algorithm as implemented by the Keratron keratoscope. Am J Ophthalmol. 120:1995;658-664.
5. Cohen K.L., Tripoli N.K., Holmgren D.E., et al. Assessment of the power and height of radial aspheres reported by a computer-assisted keratoscope. Am J Ophthalmol. 119:1995;723-732.
6. Howland H.C., Howland B. A subjective method for the measurement of monochromatic aberrations of the eye. J Opt Soc Am. 67:1977;1508-1518.
7. Smirnov M.S. Measurement of the wave aberration of the human eye. Biofizika. 6:1961;687-703.
8. Woods R., Bradley A., Atchison D. Monocular diplopia caused by ocular aberrations and hyperopic defocus. Vision Res. 36:1996;3597-3606.
9. Walsh G., Charman W.N., Howland H.C. Objective technique for the determination of monochromatic aberrations of the human eye. J Opt Soc Am A. 1:1984;987-992.
10. Liang J., Grimm B., Goelz S., Bille J. Objective measurement of the wave aberrations of the human eye with the use of a Hartmann-Shack wave-front sensor. J Opt Soc Am A. 11:1994;1949-1957.
11. Liang J., Williams D.R. Aberrations and retinal image quality of the normal human eye. J Opt Soc Am A. 14:1997;2873-2883.
12. Salmon T.O., Thibos L.N., Bradley A. Comparison of the eye's wave-front aberration measured psychophysically and with the Shack-Hartmann wave-front sensor. J Opt Soc Am A. 15:1998;2457-2465.
13. Applegate R: Optical and clinical issues in the measurement of corneal topography. Technical Digest on Ophthalmic and Visual Optics, Series 3. Washington, DC, Optical Society of America, 1992, pp. 19-23.
14. Applegate R., Howland H. Noninvasive measurement of corneal topography. IEEE Eng Med Biol. 14:1995;30-42.
15. Belin MW, Cambier JL, Nabors JR, et al: PAR Corneal Topography System (PAR CTS): The clinical application of close-range photogrammetry. Optom Vis Sci 1996;72:838-837.
16. Douthwaite W.A. EyeSys corneal topography measurement applied to calibrated ellipsoidal convex surfaces. Br J Ophthalmol. 79:1995;797-801.
17. Carney L.G., Mainstone J.C., Henderson B.A. Corneal topography and myopia A cross-sectional study . Invest Ophthalmol Vis Sci. 38:1997;311-320.
18. Mandell R., St. Helen R. Position and curvature of the corneal apex. Am J Optom Arch Am Acad Optom. 46:1969;25-29.
19. Eghboli F., Yeung K.K., Maloney R.K. Topographic determination of corneal asphericity and its lack of effect on the relative outcome of radial keratotomy. Am J Ophthalmol. 119:1995;275-280.
20. Artal P., Guirao A. Contributions of the cornea and the lens to the aberrations of the human eye. Optics Lett. 23:1998;1713-1715.