Abstract | PURPOSE: METHODS: We performed a retrospective audit of 38 eyes (19 patients) with myopia and myopic astigmatism. A customized aspheric transition zone profile (CATz) was used in all eyes (profile 4) with an ablation zone of 5 mm and a transition zone of 9 mm using FinalFit software and a Nidek EC-5000 CX II excimer laser system. RESULTS: Mean higher order aberrations (RMS) increased from 0.42 microm at baseline to 0.57 microm at 6-month follow-up. Mean spherical aberrations (Z12) increased from 0.02 microm at baseline to 0.33 microm after LASIK. Mean spherical aberration defocus equivalent (DEQ) increased from 0.56 microm at baseline to 1.54 at 6 months after surgery. Mean trefoil (Z6) was -0.11 microm at baseline and -0.14 microm at the 3-month examination. Mean coma (Z7) was -0.09 microm at baseline and -0.10 microm after surgery. Mean coma ( Z8) was -0.03 at baseline and 0 at the 3-month examination. Mean trefoil (Z9) was -0.03 at baseline and -0.12 at the 3-month examination. CONCLUSION: The amount of postoperative higher order aberrations in these myopic eyes was acceptable. However, the clinical significance of these numerical changes in aberrations is not known.
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Authors | Ian Y L Yeung, Sanjay Mantry, Ian A Cunliffe, Mark T Benson, Sunil Shah |
Journal | Journal of refractive surgery (Thorofare, N.J. : 1995)
(J Refract Surg)
2004 Sep-Oct
Vol. 20
Issue 5 Suppl
Pg. S659-62
ISSN: 1081-597X [Print] United States |
PMID | 15521261
(Publication Type: Journal Article)
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Topics |
- Adult
- Aged
- Astigmatism
(surgery)
- Corneal Topography
- Humans
- Keratomileusis, Laser In Situ
(methods)
- Middle Aged
- Myopia
(surgery)
- Postoperative Complications
(diagnosis)
- Refraction, Ocular
- Retrospective Studies
- Visual Acuity
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