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Changes in corneal aberrations after cataract surgery.

Yuki Hidaka1, Takefumi Yamaguchi2, Megumi Saiki1

  • 1Department of Ophthalmology, Keio University School of Medicine, 35 Shinanomachi, Shinjuku-ku, Tokyo, 160-8582, Japan.

Japanese Journal of Ophthalmology
|March 3, 2016
PubMed
Summary
This summary is machine-generated.

Cataract surgery using a 2.2-mm incision significantly altered total corneal oblique astigmatism. Anterior corneal aberration changes were the primary drivers of these total corneal shifts.

Keywords:
AberrationCataract surgeryCornea

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Area of Science:

  • Ophthalmology
  • Corneal Physiology
  • Surgical Outcomes

Background:

  • Cataract surgery is a common procedure to restore vision.
  • Understanding changes in corneal aberrations post-surgery is crucial for visual quality.
  • Small-incision techniques aim to minimize refractive and aberrometric changes.

Purpose of the Study:

  • To investigate alterations in corneal aberrations following cataract surgery.
  • To analyze changes in anterior, posterior, and total corneal wavefront aberrations.
  • To evaluate the impact of a 2.2-mm superior sclerocorneal incision on corneal optics.

Main Methods:

  • 36 eyes of 36 patients undergoing cataract surgery via a 2.2-mm incision were studied.
  • Corneal wavefront aberrations were measured preoperatively and 1 month postoperatively.
  • Zernike terms and higher-order aberrations (S3, S4, THOA) were analyzed for anterior, posterior, and total cornea.

Main Results:

  • No significant changes in S3 and S4 for total and anterior cornea.
  • Significant changes observed in posterior cornea S4 and total higher-order aberrations (THOA).
  • Oblique astigmatism (Z 2 (-2)) of the total cornea significantly increased post-surgery (P=0.02).

Conclusions:

  • A 2.2-mm incision in cataract surgery leads to significant changes in total corneal oblique astigmatism.
  • Changes in anterior corneal aberrations, both lower and higher order, predominantly influence total corneal aberration shifts.
  • The posterior cornea's contribution to total corneal aberration changes was limited, except for Z 2 (0).