Journal of Cataract & Refractive Surgery
Volume 30, Issue 7 , Pages 1425-1429 , July 2004

Quantitative evaluation of regular and irregular corneal astigmatism in patients having overnight orthokeratology

  • Takahiro Hiraoka, MD

      Affiliations

    • Corresponding Author InformationReprint requests to Takahiro Hiraoka, MD, Department of Ophthalmology, Institute of Clinical Medicine, University of Tsukuba, 1-1-1, Tennoudai, Tsukuba, Ibaraki 305-8575, Japan.
    • Departments of Ophthalmology, Institute of Clinical Medicine, University of Tsubuka, Tsukuba, Japan
    • ,
  • Airi Furuya, MD

      Affiliations

    • University Hospital of Tsukuba, Tsukuba, Japan
    • ,
  • Yujiro Matsumoto, MD

      Affiliations

    • Matsumoto Eye Clinic, Ibaraki, Japan
    • ,
  • Fumiki Okamoto, MD

      Affiliations

    • Departments of Ophthalmology, Institute of Clinical Medicine, University of Tsubuka, Tsukuba, Japan
    • ,
  • Norishige Sakata, MD

      Affiliations

    • University Hospital of Tsukuba, Tsukuba, Japan
    • ,
  • Kentaro Hiratsuka, MD

      Affiliations

    • University Hospital of Tsukuba, Tsukuba, Japan
    • ,
  • Tetsuhiko Kakita, MD

      Affiliations

    • Kakita Eye Clinic, Chiba, Japan
    • ,
  • Tetsuro Oshika, MD

      Affiliations

    • Departments of Ophthalmology, Institute of Clinical Medicine, University of Tsubuka, Tsukuba, Japan

,Accepted 2 January 2004.

References 

  1. Brungardt TF. Orthokeratology (an analysis). Int Contact Lens Clin. 1976;3(1):56–58
  2. Jessen G. Orthofocus techniques. Contacto. 1962;6:200–204
  3. Kerns RL. Research in orthokeratology. Part VIII (results, conclusions and discussion of techniques). J Am Optom Assoc. 1978;49:308–314
  4. Binder PS, May CH, Grant SC. An evaluation of orthokeratology. Ophthalmology. 1980;87:729–744
  5. Polse KA, Brand RJ, Schwalbe JS, et al.  The Berkeley Orthokeratology Study, Part II (efficacy and duration). Am J Optom Physiol Opt. 1983;60:187–198
  6. Mountford J. An analysis of the changes in corneal shape and refractive error induced by accelerated orthokeratology. Int Contact Lens Clin. 1997;24:128–143
  7. Lui W-O, Edwards MH. Orthokeratology in low myopia. Part 1 (efficacy and predictability). Contact Lens Anterior Eye. 2000;23:77–89
  8. Lui W-O, Edwards MH. Orthokeratology in low myopia. Part 2 (corneal topographic changes and safety over 100 days). Contact Lens Anterior Eye. 2000;23:90–99
  9. Nichols JJ, Marsich MM, Nguyen M, et al.  Overnight orthokeratology. Optom Vis Sci. 2000;77:252–259
  10. Rah MJ, Jackson JM, Jones LA, et al.  Overnight orthokeratology (preliminary results of the Lenses and Overnight Orthokeratology (LOOK) Study). Optom Vis Sci. 2002;79:598–605
  11. Raasch TW. Corneal topography and irregular astigmatism. Optom Vis Sci. 1995;72:809–815
  12. Hjortdal JØ, Erdmann L, Bek T. Fourier analysis of video-keratographic data; a tool for separation of spherical, regular astigmatic and irregular astigmatic corneal power components. Ophthalmic Physiol Opt. 1995;15:171–185
  13. Olsen T, Dam-Johansen M, Bek T, Hjortdal JØ. Evaluating surgically induced astigmatism by Fourier analysis of corneal topography data. J Cataract Refract Surg. 1996;22:318–323
  14. Oshika T, Tomidokoro A, Maruo K, et al.  Quantitative evaluation of irregular astigmatism by Fourier series harmonic analysis of videokeratography data. Invest Ophthalmol Vis Sci. 1998;39:705–709
  15. Mountford J, Pesudovs K. An analysis of the astigmatic changes induced by accelerated orthokeratology. Clin Exp Optom. 2002;85:284–293
  16. Wyzinski P. Escalation of keratospeak (regular and irregular astigmatism). Refract Corneal Surg. 1990;6:231; [letter]
  17. Keller PR, McGhee CN, Weed KH. Fourier analysis of corneal topography data after photorefractive keratectomy. J Cataract Refract Surg. 1998;24:1447–1455
  18. Baek TM, Lee KH, Tomidokoro A, Oshika T. Corneal irregular astigmatism after laser in situ keratomileusis for myopia. Br J Ophthalmol. 2001;85:534–536
  19. Tomidokoro A, Soya K, Miyata K, et al.  Corneal irregular astigmatism and contrast sensitivity after photorefractive keratectomy. Ophthalmology. 2001;108:2209–2212
  20. Tanabe T, Tomidokoro A, Samejima T, et al.  Corneal regular and irregular astigmatism assessed by Fourier analysis of videokeratography data in normal and pathological eyes. Ophthalmology. 2004;111:752–757

☆ None of the authors has a financial or proprietary interest in any material or method mentioned.

PII: S0886-3350(04)00233-0

doi: 10.1016/j.jcrs.2004.02.049

Journal of Cataract & Refractive Surgery
Volume 30, Issue 7 , Pages 1425-1429 , July 2004

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