title: Changes in corneal aberrations after cataract surgery.
abstract: OBJECTIVE
  To study the changes in corneal aberrations after cataract surgery.
  
  
  METHODS
  This study comprised 36 eyes of 36 patients (mean age, 67.3 years) who underwent cataract surgery through a 2.2-mm superior sclerocorneal incision. The anterior, posterior, and total corneal wavefront aberrations for the 6.0-mm pupillary diameter were measured preoperatively and 1 month postoperatively. The postoperative changes in corneal aberrations were evaluated for individual Zernike terms (Z 2 (-2) , Z 2 (0) , Z 2 (2) , Z 3 (-1) , Z 3 (1) , and Z 4 (0) ) and the root mean squares of the third, fourth, and total higher-order aberrations (S3, S4, and THOA).
  
  
  RESULTS
  No significant postoperative changes were observed in S3 and S4 of the total and anterior cornea, although significant changes were observed in S4 and THOA of the posterior cornea. Regarding the preoperative and postoperative Zernike terms of the total cornea, the oblique astigmatism (Z 2 (-2) ) changed significantly (P = 0.02). Significant positive correlations were observed in the Z 2 (-2) , Z 2 (0) , Z 2 (2) Z 3 (-1) , Z 3 (1) and Z 4 (0) between the changes in the total and the anterior cornea (P < 0.001 for all comparisons). However, no correlations were observed in the changes in the Zernike terms between the total and the posterior cornea, except for the Z 2 (0) .
  
  
  CONCLUSIONS
  The oblique astigmatism (Z 2 (-2) ) of the total cornea significantly changed after 2.2-mm-incision cataract surgery. The changes in the lower- and higher-order aberrations of the anterior cornea mainly contributed to the changes in the total cornea.
authors.affiliation: Department of Ophthalmology, Keio University School of Medicine, 35 Shinanomachi, Shinjuku-ku, Tokyo, 160-8582, Japan.
authors.forename: Yuki
authors.initials: Y
authors.lastname: Hidaka
authors.affiliation: Department of Ophthalmology, Ichikawa General Hospital, Tokyo Dental College, Chiba, Japan.
authors.forename: Takefumi
authors.initials: T
authors.lastname: Yamaguchi
authors.affiliation: Department of Ophthalmology, Keio University School of Medicine, 35 Shinanomachi, Shinjuku-ku, Tokyo, 160-8582, Japan.
authors.forename: Megumi
authors.initials: M
authors.lastname: Saiki
authors.affiliation: Department of Ophthalmology, Ichikawa General Hospital, Tokyo Dental College, Chiba, Japan.
authors.forename: Murat
authors.initials: M
authors.lastname: Dogru
authors.affiliation: Department of Ophthalmology, Keio University School of Medicine, 35 Shinanomachi, Shinjuku-ku, Tokyo, 160-8582, Japan.
authors.forename: Kazuo
authors.initials: K
authors.lastname: Tsubota
authors.affiliation: Department of Ophthalmology, Keio University School of Medicine, 35 Shinanomachi, Shinjuku-ku, Tokyo, 160-8582, Japan. fwic7788@mb.infoweb.ne.jp.
authors.forename: Kazuno
authors.initials: K
authors.lastname: Negishi
mesh_terms: D000368:Aged; D002387:Cataract Extraction / Q000009:adverse effects*; D003315:Cornea / Q000000981:diagnostic imaging*; D019781:Corneal Topography; D057108:Corneal Wavefront Aberration / Q000175:diagnosis* / Q000209:etiology; D005260:Female; D005500:Follow-Up Studies; D006801:Humans; D007910:Lenses, Intraocular; D008297:Male; D008866:Microsurgery / Q000379:methods*; D013997:Time Factors; D014792:Visual Acuity / Q000502:physiology*
keywords: Aberration; Cataract surgery; Cornea