The role of reference body selection in calculating posterior corneal elevation and prediction of keratoconus using rotating Scheimpflug camera

Acta Ophthalmologica

Volumn 89, Issue 3, 2011, Pages

  Kovács, Illés ^a   Miháltz, Kata ^a   Ecsedy, Mónika ^a   Németh, János ^a   Nagy, Zoltán Z ^a  

^a SEMMELWEIS UNIVERSITY   (Hungary)

Author keywords

corneal asphericity; keratoconus; posterior elevation; Scheimpflug imaging

Indexed keywords

ADULT; ARTICLE; ASTIGMATISM; BEST FIT SPHERE REFERENCE SURFACE; BEST FIT TORIC ELLIPSOID REFERENCE SURFACE; CAMERA; CLINICAL ARTICLE; CONTROLLED STUDY; CORNEA ASPHERICITY; CORNEA ASTIGMATISM; DIAGNOSTIC ACCURACY; DIAGNOSTIC TEST ACCURACY STUDY; FEMALE; HUMAN; KERATOCONUS; MALE; OBSERVATIONAL STUDY; POSTERIOR CORNEAL ELEVATION; PREDICTIVE VALUE; PRIORITY JOURNAL; PROSPECTIVE STUDY; RECEIVER OPERATING CHARACTERISTIC; REFERENCE VALUE; ROTATING SCHEIMPFLUG CAMERA; SENSITIVITY AND SPECIFICITY; SURFACE PROPERTY; VISUAL SYSTEM PARAMETERS;

ADULT; ASTIGMATISM; CORNEA; CORNEAL TOPOGRAPHY; DIAGNOSTIC TECHNIQUES, OPHTHALMOLOGICAL; FEMALE; HUMANS; KERATOCONUS; MALE; PHOTOGRAPHY; PREDICTIVE VALUE OF TESTS; PROSPECTIVE STUDIES; REPRODUCIBILITY OF RESULTS; ROC CURVE; SENSITIVITY AND SPECIFICITY;

EID: 79955008119     PISSN: 1755375X     EISSN: 17553768     Source Type: Journal    
DOI: 10.1111/j.1755-3768.2010.02053.x     Document Type: Article

References (33)

1. Ambrósio R, Alonso RS, Luz A, &, Velarde LGC, (2006): Corneal-thickness spatial profile and corneal-volume distribution: tomographic indices to detect keratoconus. J Cataract Refract Surg 32: 1851-1859. (Pubitemid 44647765)
2. Barr JT, Wilson BS, Gordon MO, et al., (2006): Estimation of the incidence and factors predictive of corneal scarring in the Collaborative Longitudinal Evaluation of Keratoconus (CLEK) Study. Cornea 25: 16-25. (Pubitemid 43031143)
3. Belin MW, &, Khachikian SS, (2007): Keratoconus: it is hard to define, butâ∥. Am J Ophthalmol 143: 500-503.
4. Belin MW, &, Khachikian SS, (2009): An introduction to understanding elevation-based topography: how elevation data are displayed-a review. Clin Experiment Ophthalmol 37: 14-29.
5. Calossi A, (2007): Corneal asphericity and spherical aberration. J Refract Surg 23: 505-514. (Pubitemid 46762517)
6. Ciolino JB, Khachikian SS, &, Belin MW, (2008): Comparison of corneal thickness measurements by ultrasound and Scheimpflug photography in eyes that have undergone laser in situ keratomileusis. Am J Ophthalmol 145: 75-80.
7. De Sanctis U, Loiacono C, Richiardi L, et al., (2008): Sensitivity and specificity of posterior corneal elevation measured by Pentacam in discriminating keratoconus/subclinical keratoconus. Ophthalmology 115: 1534-1539.
8. Efron B, (1979): Bootstrap methods: another look at the jackknife. Ann Stat 7: 1-26.
9. Emre S, Doganay S, &, Yologlu S, (2007): Evaluation of anterior segment parameters in keratoconic eyes measured with the Pentacam system. J Cataract Refract Surg 33: 1708-1712. (Pubitemid 47419232)
10. Fam HB, &, Lim KL, (2006): Corneal elevation indices in normal and keratoconic eyes. J Cataract Refract Surg 32: 1281-1287.
11. Hanley JA, Negassa A, Edwardes MD, &, Forrester JE, (2003): Statistical analysis of correlated data using generalized estimating equations: an orientation. Am J Epidemiol 157: 364-375. (Pubitemid 36196757)
12. Ho JD, Tsai CY, Tsai RJF, et al., (2008): Validity of the keratometric index: evaluation by the Pentacam rotating Scheimpflug camera. J Cataract Refract Surg 34: 137-145.
13. Khachikian SS, &, Belin MW, (2009): Posterior elevation in keratoconus. Ophthalmology 116: 816.
14. Koller T, Iseli HP, Hafezi F, Vinciguerra P, &, Seiler T, (2009): Scheimpflug imaging of corneas after collagen cross-linking. Cornea 28: 510-515.
15. Konstantopoulos A, Hossain P, &, Anderson DF, (2007): Recent advances in ophthalmic anterior segment imaging: a new era for ophthalmic diagnosis? Br J Ophthalmol 9: 1551-1557.
16. Martus P, Jünemann A, &, Wisse M, (2000): Multivariate approach for quantification of morphologic and functional damage in glaucoma. Invest Ophthalmol Vis Sci 41: 1099-1110. (Pubitemid 30187547)
17. McMahon TT, Edrington TB, Szczotka-Flynn L, et al., (2006): Longitudinal changes in corneal curvature in keratoconus. Cornea 25: 296-305.
18. Miháltz K, Kovács I, Takács Ã, &, Nagy ZZ, (2009): Evaluation of keratometric, pachymetric and elevation parameters of keratoconic corneas with Pentacam. Cornea 28: 976-980.
19. Neshburn AB, Bahri S, &, Salz J, (1995): Keratoconus detected by videokeratography in candidates for photorefractive keratectomy. J Refract Surg 11: 194-201.
20. Nilforoushan MR, Marmor M, Abramson J, et al., (2008): Comparative evaluation of refractive surgery candidates with Placido topography, Orbscan II, Pentacam, and wavefront analysis. J Cataract Refract Surg 34: 623-631. (Pubitemid 351417621)
21. Quisling S, Sjoberg S, Zimmerman B, &, Goins K, (2006): Comparison of Pentacam and Orbscan II on posterior curvature topography measurements in keratoconus eyes. Ophthalmology 113: 1629-1632. (Pubitemid 44292305)
22. Rabinowitz YS, (1995): Videokeratographic indices to aid in screening for keratoconus. J Refract Surg 11: 371-379.
23. Rabinowitz YS, (1998): Keratoconus. Surv Ophthalmol 42: 297-319. (Pubitemid 28092771)
24. Rabinowitz YS, &, Rasheed K, (1999): KISA% index: a quantitative videokeratography algorithm embodying minimal topographic criteria for diagnosing keratoconus. J Cataract Refract Surg 25: 1327-1335. (Pubitemid 29458516)
25. Rao SN, Raviv T, Majmudar PA, &, Epstein RJ, (2002): Role of Orbscan II in screening keratoconus suspects before refractive corneal surgery. Ophthalmology 109: 1642-1646. (Pubitemid 35012011)
26. Reinstein DZ, Archer TJ, &, Gobbe M, (2009): Corneal epithelial thickness profile in the diagnosis of keratoconus. J Refract Surg 25: 604-610.
27. Rüfer S, Schröder A, Arvani MK, et al., (2005): Central and peripheral corneal pachymetry-standard evaluation with the Pentacam system. Klin Monatsbl Augenheilkd 222: 117-122. (Pubitemid 40327315)
28. Schlegel Z, Hoang-Xuan T, &, Gatinel D, (2008): Comparison of and correlation between anterior and posterior corneal elevation maps in normal eyes and keratoconus-suspect eyes. J Cataract Refract Surg 34: 789-795. (Pubitemid 351615505)
29. Swartz T, Marten L, &, Wang M, (2007): Measuring the cornea: the latest developments in corneal topography. Curr Opin Ophthalmol 18: 325-333. (Pubitemid 46955300)
30. Tomidokoro A, Oshika T, Amano S, et al., (2000): Changes in anterior and posterior corneal curvatures in keratoconus. Ophthalmology 107: 1328-1332.
31. Touloumi G, Babiker AG, Pocock SJ, &, Darbyshire JH, (2001): Impact of missing data due to drop-outs on estimators for rates of change in longitudinal studies: a simulation study. Stat Med 20: 3715-3728.
32. Wilson SE, (2000): Cautions regarding measurement of the posterior corneal curvature. Ophthalmology 107: 1223.
33. Zeger SL, Liang KY, &, Albert PS, (1988): Models for longitudinal data: a generalized estimating equation approach. Biometrics 44: 1049-1060. (Pubitemid 19026037)