Corneal elevation topography: Best fit sphere, elevation distance, asphericity, toricity, and clinical implications

Cornea

Volumn 30, Issue 5, 2011, Pages 508-515

  Gatinel, Damien ^a,b,c,d   Malet, Jacques ^c,d   Hoang Xuan, Thanh ^a,b   Azar, Dimitri T ^e  

^a FONDATION OPHTALMOLOGIQUE ADOLPHE DE ROTHSCHILD   (France)

^b BICHAT HOSPITAL   (France)

^c SORBONNE UNIVERSITÉ   (France)

^d Center for Expertise and Research in Optics for Clinicians (CEROC)   (France)

^e UNIVERSITY OF ILLINOIS AT CHICAGO   (United States)

Author keywords

asphericity; best fit sphere; cornea; prolateness; topography; toricity

Indexed keywords

ARTICLE; BEST FIT SPHERE; CORNEA; CORNEA ASPHERICITY; CORNEA ELEVATION TOPOGRAPHY; CORNEA TORICITY; PRIORITY JOURNAL; TOPOGRAPHY; VISUAL SYSTEM PARAMETERS;

ASTIGMATISM; CORNEA; CORNEAL TOPOGRAPHY; ENDOTHELIUM, CORNEAL; EPITHELIUM, CORNEAL; HUMANS; KERATOCONUS; MODELS, BIOLOGICAL;

EID: 79955058220     PISSN: 02773740     EISSN: 15364798     Source Type: Journal    
DOI: 10.1097/ICO.0b013e3181fb4fa7     Document Type: Article

References (59)

1. Cairns G, McGhee CN. Orbscan computerized topography: attributes, applications, and limitations. J Cataract Refract Surg. 2005;31:205-220. (Pubitemid 40267672)
2. Holland SP, Srivannaboon S, Reinstein DZ. Avoiding serious corneal complications of laser assisted in situ keratomileusis and photorefractive keratectomy. Ophthalmology. 2000;107:640-652. (Pubitemid 30191330)
3. Kohnen T. Iatrogenic keratectasia: current knowledge, current measurements. J Cataract Refract Surg. 2002;28:2065-2066. (Pubitemid 36026073)
4. Faraj HG, Gatinel D, Chastang PJ, et al. Corneal ectasia after LASIK. J Cataract Refract Surg. 2003;29:220.
5. Randleman JB, Russell B, Ward MA, et al. Risk factors and prognosis for corneal ectasia after LASIK. Ophthalmology. 2003;110:267-275. (Pubitemid 36184329)
6. Binder PS, Lindstrom RL, Stulting RD, et al. Keratoconus and corneal ectasia after LASIK. J Cataract Refract Surg. 2005;31:2035-2038.
7. Holland EJ. Ectasia following laser in situ keratomileusis. J Cataract Refract Surg. 2005;31:2034. (Pubitemid 43075353)
8. Tabbara KF, Kotb AA. Risk factors for corneal ectasia after LASIK. Ophthalmology. 2006;113:1618-1622. (Pubitemid 44292304)
9. Rabinowitz YS. Ectasia after laser in situ keratomileusis. Curr Opin Ophthalmol. 2006;17:421-426. (Pubitemid 44319034)
10. Randleman JB. Post-laser in-situ keratomileusis ectasia: current understanding and future directions. Curr Opin Ophthalmol. 2006;17: 406-412. (Pubitemid 44215053)
11. Condon PI. 2005 ESCRS Ridley Medal Lecture: will keratectasia be a major complication for LASIK in the long term? J Cataract Refract Surg. 2006; 32:2124-2132. (Pubitemid 44809608)
12. Condon PI, O'keefe M, Binder PS. Long-term results of laser in situ keratomileusis for high myopia: risk for ectasia. J Cataract Refract Surg. 2007;33:583-590. (Pubitemid 46482960)
13. Maeda N, Klyce SD, Smolek MK, et al. Automated keratoconus screening with corneal topography analysis. Invest Ophthalmol Vis Sci. 1994;35: 2749-2757. (Pubitemid 24149786)
14. Wilson SE, Klyce SD. Screening for corneal topographic abnormalities before refractive surgery. Ophthalmology. 1994;101:147-152. (Pubitemid 24044156)
15. Maeda N, Klyce SD, Smolek MK. Comparison of methods for detecting keratoconus using videokeratography. Arch Ophthalmol. 1995;113: 870-874.
16. Maeda N, Klyce SD, Smolek MK. Neural network classification of corneal topography. Preliminary demonstration. Invest Ophthalmol Vis Sci. 1995;36:1327-1335.
17. Smolek MK, Klyce SD. Current keratoconus detection methods compared with a neural network approach. Invest Ophthalmol Vis Sci. 1997;38: 2290-2299. (Pubitemid 27446946)
18. Rabinowitz YS, Rasheed K. KISA% index: a quantitative videokeratography algorithm embodying minimal topographic criteria for diagnosing keratoconus. J Cataract Refract Surg. 2000;26:472-474.
19. Chastang PJ, Borderie VM, Carvajal-Gonzalez S, et al. Automated keratoconus detection using the EyeSys videokeratoscope. J Cataract Refract Surg. 2000;26:675-683. (Pubitemid 30331917)
20. Mahmoud AM, Roberts CJ, Lembach RG, et al; CLEK Study Group. CLMI: the cone location and magnitude index. Cornea. 2008;27:480-487. (Pubitemid 351591488)
21. Auffarth GU, Wang L, Volcker HE. Keratoconus evaluation using the Orbscan Topography System. J Cataract Refract Surg. 2000;26:222-228. (Pubitemid 30094301)
22. Tomidokoro A, Oshika T, Amano S, et al. Changes in anterior and posterior corneal curvatures in keratoconus. Ophthalmology. 2000;107: 1328-1332.
23. Rao SN, Raviv T, Majmudar PA, et al. Role of Orbscan II in screening keratoconus suspects before refractive corneal surgery. Ophthalmology. 2002;109:1642-1646. (Pubitemid 35012011)
24. Schlegel Z, Hoang-Xuan T, Gatinel D. Comparison of and correlation between anterior and posterior corneal elevation maps in normal eyes and keratoconus-suspect eyes. J Cataract Refract Surg. 2008;34:789-795. (Pubitemid 351615505)
25. Bessho K, Maeda N, Kuroda T, et al. Automated keratoconus detection using height data of anterior and posterior corneal surfaces. Jpn J Ophthalmol. 2006;50:409-416. (Pubitemid 44496506)
26. Lim L, Wei RH, Chan WK, et al. Evaluation of keratoconus in Asians: role of Orbscan II and Tomey TMS-2 corneal topography. Am J Ophthalmol. 2007;143:390-400.
27. Sonmez B, Doan MP, Hamilton DR. Identification of scanning slit-beam topographic parameters important in distinguishing normal from keratoconic corneal morphologic features. Am J Ophthalmol. 2007;143: 401-408.
28. Rufer F, Schroder A, Arvani MK, et al. Central and peripheral corneal pachymetry-standard evaluation with the Pentacam system. Klin Monatsbl Augenheilkd. 2005;222:117-122. (Pubitemid 40327315)
29. Chen D, Lam AK. Intrasession and intersession repeatability of the Pentacam system on posterior corneal assessment in the normal human eye. J Cataract Refract Surg. 2007;33:448-454. (Pubitemid 46281560)
30. Lam AK, Chen D. Pentacam pachometry: comparison with non-contact specular microscopy on the central cornea and inter-session repeatability on the peripheral cornea. Clin Exp Optom. 2007;90:108-114.
31. Menassa N, Kaufmann C, Goggin M, et al. Comparison and reproducibility of corneal thickness and curvature readings obtained by the Galilei and the Orbscan II analysis systems. J Cataract Refract Surg. 2008;34:1742-1747.
32. Patel S, Marshall J, Fitzke FW. Shape and radius of posterior corneal surface. Refract Corneal Surg. 1993;9:173-181. (Pubitemid 23191656)
33. Garner LF, Owens H, Yap MK, et al. Radius of curvature of the posterior surface of the cornea. Optom Vis Sci. 1997;74:496-498. (Pubitemid 27377624)
34. Lam AK, Douthwaite WA. A pilot study on the measurement of central posterior corneal radius in Hong Kong Chinese using Purkinje image technique. Ophthalmic Physiol Opt. 1997;17:68-74. (Pubitemid 27037696)
35. Dubbelman M, Sicam VA, Van der Heijde GL. The shape of the anterior and posterior surface of the aging human cornea. Vision Res. 2006;46: 993-1001. (Pubitemid 43016129)
36. Kiely PM, Smith G, Carney LG. The mean shape of the human cornea. Opt Acta. 1982;29:1027-1040.
37. Guillon M, Lydon DP, Wilson C. Corneal topography: a clinical model. Ophthalmic Physiol Opt. 1986;6:47-56. (Pubitemid 16157535)
38. Eghbali F, Yeung KK, Maloney RK. Topographic determination of corneal asphericity and its lack of effect on the refractive outcome of radial keratotomy. Am J Ophthalmol. 1995;119:275-280.
39. Carney LG, Mainstone JC,Henderson BA. Corneal topography andmyopia: a cross sectional study. Invest Ophthalmol Vis Sci. 1997;38:311-320. (Pubitemid 27085687)
40. Holladay JT. Corneal topography using the Holladay diagnostic summary. J Cataract Refract Surg. 1997;23:209-221. (Pubitemid 27175742)
41. Douthwaite WA, Hough T, Edwards K, et al. The EyeSys videokeratoscope assessment of apical radius and p-value in the normal human cornea. Ophthalmic Physiol Opt. 1999;19:467-474. (Pubitemid 29528441)
42. Schwiegerling J, Snyder RW. Custom photorefractive keratectomy ablations for the correction of spherical and cylindrical refractive error and higher-order aberration. J Opt Soc Am A Opt Image Sci Vis. 1998;15: 2572-2579. (Pubitemid 128577251)
43. Langenbucher A, Viestenz A, Seitz B. Conoidal fitting of corneal topography height data after excimer laser penetrating keratoplasty. J Refract Surg. 2002;18:63-71. (Pubitemid 34098020)
44. Langenbucher A, Seitz B, Naumann GO. Three-axis ellipsoidal fitting of videokeratoscopic height data after penetrating keratoplasty. Curr Eye Res. 2002;24:422-429. (Pubitemid 36126759)
45. Wei RH, Lim L, Chan WK, et al. Evaluation of Orbscan II corneal topography in individuals with myopia. Ophthalmology. 2006;113:177-183. (Pubitemid 43170765)
46. Mó dis L Jr, Langenbucher A, Seitz B. Evaluation of normal corneas using the scanning-slit topography/pachymetry system. Cornea. 2004;23: 689-694. (Pubitemid 39314778)
47. Hick S, Laliberte JF, Meunier J, et al. Topographic screening of donor eyes for previous refractive surgery. J Cataract Refract Surg. 2006;32: 309-317.
48. Ciolino JB, Belin MW. Changes in the posterior cornea after laser in situ keratomileusis and photorefractive keratectomy. J Cataract Refract Surg. 2006;32:1426-1431. (Pubitemid 44247476)
49. Laliberte JF, Meunier J, Chagnon M, et al. Construction of a 3-D atlas of corneal shape. Invest Ophthalmol Vis Sci. 2007;48:1072-1078. (Pubitemid 351261399)
50. Naufal SC, Hess JS, Friedlander MH, et al. Rasterstereography-based classification of normal corneas. J Cataract Refract Surg. 1997;23: 222-230. (Pubitemid 27175743)
51. Liu Z, Huang AJ, Pflugfelder SC. Evaluation of corneal thickness and topography in normal eyes using the Orbscan corneal topography system. Br J Ophthalmol. 1999;83:774-778. (Pubitemid 29324786)
52. Tananuvat N, Pansatiankul N. Assessment of the anterior structures of eyes in a normal Northern Thai group using the Orbscan II. J Med Assoc Thai. 2005;88(Suppl 9):S105-S113. (Pubitemid 43161645)
53. Lim KL, Fam HB. Relationship between the corneal surface and the anterior segment of the cornea: an Asian perspective. J Cataract Refract Surg. 2006;32:1814-1819.
54. Tanabe T, Oshika T, Tomidokoro A, et al. Standardized color-coded scales for anterior and posterior elevation maps of scanning slit corneal topography. Ophthalmology. 2002;109:1298-1302. (Pubitemid 34700922)
55. Reinstein DZ, Archer TJ, Gobbe M, et al. Epithelial thickness in the normal cornea: three-dimensional display with Artemis very highfrequency digital ultrasound. J Refract Surg. 2008;24:571-581. (Pubitemid 351842081)
56. Gatinel D, Racine L, Hoang-Xuan T. Contribution of the corneal epithelium to anterior corneal topography in patients having myopic photorefractive keratectomy. J Cataract Refract Surg. 2007;33:1860-1865. (Pubitemid 47615361)
57. Grzybowski DM, Roberts CJ, Mahmoud AM, et al. Model for nonectatic increase in posterior corneal elevation after ablative procedures. J Cataract Refract Surg. 2005;31:72-81. (Pubitemid 40260693)
58. Navarro R, Gonzalez L, Hernandez JL. Optics of the average normal cornea from general and canonical representations of its surface topography. J Opt Soc Am A Opt Image Sci Vis. 2006;23:219-232.
59. Read SA, Collins MJ, Carney LG, et al. The topography of the central and peripheral cornea. Invest Ophthalmol Vis Sci. 2006;47:1404-1415. (Pubitemid 46780747)