Precision of autokeratometry expressed as confidence ellipses in Euclidian 2-space

Ophthalmic and Physiological Optics

Volumn 20, Issue 2, 2000, Pages 160-168

  Naeser, Kristian ^a,b   Guo, Suping ^a  

^a AALBORG UNIVERSITY HOSPITAL   (Denmark)

^b Randers Centralsygehus ^*  (Denmark)

Author keywords

[No Author keywords available]

Indexed keywords

ACCURACY; ANALYTIC METHOD; ARTICLE; ASTIGMATISM; CORNEA EPITHELIUM; HUMAN; KERATOMETRY; KERATOSCOPY; MULTIVARIATE ANALYSIS; PRIORITY JOURNAL; REPRODUCIBILITY; SURGICAL TECHNIQUE;

AGED; ASTIGMATISM; CONFIDENCE INTERVALS; CORNEAL TOPOGRAPHY; FEMALE; HUMANS; MALE; MIDDLE AGED; MULTIVARIATE ANALYSIS;

EID: 0033995702     PISSN: 02755408     EISSN: None     Source Type: Journal    
DOI: 10.1016/S0275-5408(99)00036-8     Document Type: Article

References (26)

1. Bennett, A. G. (1984). A new approach to the statistical analysis of ocular astigmatism and astigmatic prescriptions. The Frontiers of Optometry: First International Congress 2, 35-42.
2. Bland, J. M. and Altman, D. G. (1986). Statistical methods for assessing agreement between two methods of clinical measurement. Lancet 1(8476), 307-310.
3. Bullimore, M. A., Fusaro, R. and Adams, C. W. (1998). The repeatability of automated and clinician refraction. Optom. Visual Sci. 75, 617-622.
4. Clark, B. A. J. (1973). Conventional keratoscopy - a critical review. Aust. J. Optom. 56(4), 140-153.
5. Cronje, S. and Harris, W. F. (1997). Short-term keratometric variation in the human eye. Optom. Visual Sci. 74, 420-424.
6. Deal, F. C. and Toop, J. (1993). Recommended coordinate systems for thin spherocylindrical lenses. Optom. Visual Sci. 70, 409-413.
7. Elliott, M., Simpson, T., Richter, D. and Fonn, D. (1997). Repeatability and accuracy of automated refraction: A comparison of the Nikon NRK-8000, the Nidek AR-1000, and subjective refraction. Optom. Visual Sci. 74, 434-438.
8. Hannush, S. B., Crawford, S. L., Waring, G. O., Gemmill, M. C., Lynn, M. J. and Nizam, A. (1989). Accuracy and precision of keratometry, photokeratoscopy, and corneal modeling on calibrated steel balls. Arch. Ophthalmol. 107, 1235-1239.
9. Harris, W. F. (1991). Representation of dioptric power in Euclidian 3-space. Ophthal. Physiol. Opt. 11, 130-136.
10. Harris, W. F. (1997). Dioptric power: Its representation in three- and four-dimensional space. Optom. Visual Sci. 74, 349-366.
11. Harris, W. F., Malan, D. J. and Rubin, A. (1991). Ellipsoidal confidence regions for mean refractive status. Optom. Visual Sci. 68, 950-953.
12. Karabatsas, C. H., Cook, S. D., Papaefthymiou, J., Turner, P. and Sparrow, J. M. (1998). Clinical evaluation of keratometry and computerized videokeratography: intra observer and interobserver variability on normal and astigmatic corneas. Br. J. Ophthalmol. 82, 637-642.
13. Koch, D. D., Wakil, J. S., Samuelson, S. W. and Haft, E. A. (1992). Comparison of the accuracy and reproducibility of the keratometer and the EyeSys corneal analysis system model I. J. Cataract Refract. Surg. 18, 342-347.
14. McKendrick, A. M. and Brennan, N. A. (1996). Distribution of astigmatism in the adult population. J. Opt. Soc. Am. 13(2), 206-214.
15. Moura, R. C. M. R., Bowyer, B. L., Stevens, S. X. and Rowsey, J. (1998). Comparison of three computerized videokeratoscopy systems with keratometry. Cornea 17(5), 522-528.
16. Naeser, K. (1990). Conversion of keratometer readings to polar values. J. Cataract Refract. Surg. 16, 741-745.
17. Naeser, K. (1997). Assessment of surgically induced astigmatism; Call for an international standard. J. Cataract Refract. Surg. 23, 1278-1280.
18. Naeser, K. and Behrens, J. K. (1997). Correlation between polar values and vector analysis. J. Cataract Refract. Surg. 23, 76-81.
19. Naeser, K. and Hjortdal, J. Ø. (1999). Bivariate analysis of surgically induced regular astigmatism. Mathematical analysis and graphical display. Ophthal. Physiol. Opht. 19(1), 50-61.
20. Naeser, K., Behrens, J. K. and Naeser, E. V. (1994). Quantitative assessment of corneal astigmatic surgery: Expanding the polar values concept. J. Cataract Refract. Surg. 20, 162-168.
21. Naeser, K., Boberg-Ans, J. and Bargum, R. (1988). Prediction of anterior corneal curvature following extra-capsular cataract surgery. J. Cataract Refract. Surg. 14, 459-460.
22. Raasch, T. (1997). Clinical refraction in three-dimensional dioptric space revisited. Optom. Visual Sci. 74, 376-380.
23. Rubin, A. and Harris, W. F. (1995). Refractive variation during autorefraction: Multivariate distribution of refractive status. Optom. Visual Sci. 72, 403-410.
24. Thibos, L. N., Wheeler, W. and Horner, P. G. (1997). Power vectors: an application of Fourier analysis to the description and statistical analysis of refractive error. Optom. Visual Sci. 74, 367-375.
25. Zadnik, K., Mutti, D. O. and Adams, A. J. (1992). The repeatability of measurement of the ocular components. Invest. Ophthalmol. Visual Sci. 33, 2325-2333.
26. Zadnik, K., Friedman, N. E. and Mutti, D. (1995). Repeatability of corneal topography: the "corneal field". J. Refract. Corneal Surg. 11, 119-125.