One-year follow-up of changes in refraction and aberrations induced by corneal incision


Autoři: Eloy A. Villegas aff001;  Encarna Alcón aff001;  Elena Rubio aff002;  José María Marín aff002;  Pablo Artal aff001
Působiště autorů: Laboratorio de Óptica, Universidad de Murcia, Murcia, Spain aff001;  Servicio de Oftalmología, Hospital Virgen de la Arrixaca, Murcia, Spain aff002
Vyšlo v časopise: PLoS ONE 14(11)
Kategorie: Research Article
doi: 10.1371/journal.pone.0224823

Souhrn

Purpose

To evaluate the surgically induced changes in refraction (sphere and astigmatism) and higher order aberrations by corneal incision for one year.

Setting

University Hospital “Virgen de la Arrixaca”, Murcia, Spain.

Design

Retrospective interventional case series.

Methods

Corneal power, astigmatism and higher order aberrations (HOA) were calculated from corneal topography measured in 27 eyes prior to surgery and at 2 weeks, 1, 2, 3 and 6 months and 1 year following cataract surgery with 3.2-mm corneal incision. At every stage, optical changes were calculated as the difference between pre- and post-surgery data (in each follow-up) using the formulas of obliquely crossed cylinders for the refraction and Zernikes coefficients for HOA.

Results

At 2 weeks after surgery the mean corneal values of induced sphere, cylinder and the root mean square (RMS) of HOA were +0.54±0.27 D, -0.77±0.32 D and 0.15 microns respectively. These parameters decreased significantly (p-values between 0 and 0.01) at 3 months to +0.33±0.27 D sphere, -0.50±0.24 D cylinder and 0.10±0.05 microns HOA and were stable at the next follow-ups. Induced spherical equivalent was around zero at all visits. The changes in HOA were mainly due to trefoil aberration.

Conclusions

Linear corneal incisions do not change the spherical power but can induce significant values of astigmatism and trefoil aberration in the cornea. However, these changes revert fully or partially to preoperative values by the third month after surgery and remain stable with time.

Klíčová slova:

Cataract surgery – Cornea – Eyes – Intraocular lens implantation – Ophthalmic procedures – Optical equipment – Refractive surgery – Surgical and invasive medical procedures


Zdroje

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2019 Číslo 11