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Stachura J, Mlyniuk P, Bloch W, et al. Shape of the anterior surface of the cornea after extended wear of silicone hydrogel soft contact lenses. Ophthalmic Physiol Opt. 2021;41(4):683-690doi: 10.1111/opo.12830.
Stachura, J., Mlyniuk, P., Bloch, W., Jimenez-Villar, A., Grulkowski, I., & Kaluzny, B. J. (2021). Shape of the anterior surface of the cornea after extended wear of silicone hydrogel soft contact lenses. Ophthalmic & physiological optics : the journal of the British College of Ophthalmic Opticians (Optometrists), 41(4), 683-690. https://doi.org/10.1111/opo.12830
Stachura, Joanna, et al. "Shape of the anterior surface of the cornea after extended wear of silicone hydrogel soft contact lenses." Ophthalmic & physiological optics : the journal of the British College of Ophthalmic Opticians (Optometrists) vol. 41,4 (2021): 683-690. doi: https://doi.org/10.1111/opo.12830
Stachura J, Mlyniuk P, Bloch W, Jimenez-Villar A, Grulkowski I, Kaluzny BJ. Shape of the anterior surface of the cornea after extended wear of silicone hydrogel soft contact lenses. Ophthalmic Physiol Opt. 2021 Jul;41(4):683-690. doi: 10.1111/opo.12830. Epub 2021 May 04. PMID: 33945648.
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Ophthalmic Physiol Opt. 2021 Jul;41(4):683-690. doi: 10.1111/opo.12830. Epub 2021 May 04.

Shape of the anterior surface of the cornea after extended wear of silicone hydrogel soft contact lenses.

Ophthalmic & physiological optics : the journal of the British College of Ophthalmic Opticians (Optometrists)

Joanna Stachura, Patryk Mlyniuk, Waldemar Bloch, Alfonso Jimenez-Villar, Ireneusz Grulkowski, Bartlomiej J Kaluzny

Affiliations

  1. Division of Ophthalmology and Optometry, Department of Ophthalmology, Collegium Medicum, Nicolaus Copernicus University, Bydgoszcz, Poland.
  2. Institute of Physics, Faculty of Physics, Astronomy and Informatics, Nicolaus Copernicus University, Toru?, Poland.

PMID: 33945648 DOI: 10.1111/opo.12830

Abstract

PURPOSE: To measure geometrical changes in the anterior surface of the cornea after wearing silicon hydrogel (SiH) soft contact lenses continuously for 1 week.

METHODS: Forty-three eyes with 3.0D of myopia and 22 eyes with 3.0D of hyperopia were enrolled in the prospective, interventional study. All subjects underwent a general eye examination, corneal tomography with wavefront aberration analysis, corneal thickness measurements and epithelial thickness mapping before and after wearing SiH lenses (Acuvue Oasys) for 7 days.

RESULTS: No significant changes in average keratometry were observed in either refractive group. In the myopic group, keratometry findings for the flat meridian (K1) and central corneal thickness decreased significantly. After +3.0 D lens wear in the hyperopic group, a significant decrease in epithelial thickness up to 3.19 µm was observed in the central and paracentral cornea, (p < 0.001). In both refractive groups, the largest epithelial thickness increase was seen in the periphery. A decrease in spherical aberration was noted in myopic eyes, while an increase of both higher order corneal aberrations and coma was found in hyperopic subjects.

CONCLUSION: Extended wear of SiH lenses results in a significant change in epithelial thickness leading to alteration in the geometry of the anterior surface of the cornea, particularly in hyperopic patients. These epithelial thickness variations lead to changes in the higher order aberrations of the cornea.

© 2021 The Authors Ophthalmic and Physiological Optics © 2021 The College of Optometrists.

Keywords: corneal geometry; silicone hydrogel; soft contact lens wearing

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