Corneal shape change during accommodation

BK Pierscionek, A Popiolek-Masajada, H Kasprzak

    Research output: Contribution to journalArticle

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    Abstract

    Purpose To investigate whether accommodation induces any changes in central corneal curvature. Methods Shape changes were measured on 14 subjects using a keratometer modified to enable a change in focus to occur without a change in vergence. All subjects were emmetropic and their ages ranged from approximately 20 to 28 years. Results In 11 of the 14 subjects a difference in central corneal curvature, of around 0.4 D in at least one principal meridian, was found when focus was changed between distant and near targets. In 9 subjects the curvature was greater for near focus in at least one meridian. In 5 subjects the change in one meridian was opposite in effect to what would be expected, i.e. the curvature was greater at distance than at near. Conclusion The study suggests that accommodation may have some effect on corneal shape.
    LanguageEnglish
    Pages766-769
    JournalEYE
    Volume15
    Issue numberPart 6
    Publication statusPublished - Dec 2001

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    Pierscionek, BK., Popiolek-Masajada, A., & Kasprzak, H. (2001). Corneal shape change during accommodation. EYE, 15(Part 6), 766-769.
    Pierscionek, BK ; Popiolek-Masajada, A ; Kasprzak, H. / Corneal shape change during accommodation. In: EYE. 2001 ; Vol. 15, No. Part 6. pp. 766-769.
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    Pierscionek, BK, Popiolek-Masajada, A & Kasprzak, H 2001, 'Corneal shape change during accommodation', EYE, vol. 15, no. Part 6, pp. 766-769.

    Corneal shape change during accommodation. / Pierscionek, BK; Popiolek-Masajada, A; Kasprzak, H.

    In: EYE, Vol. 15, No. Part 6, 12.2001, p. 766-769.

    Research output: Contribution to journalArticle

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    AU - Pierscionek, BK

    AU - Popiolek-Masajada, A

    AU - Kasprzak, H

    PY - 2001/12

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    N2 - Purpose To investigate whether accommodation induces any changes in central corneal curvature. Methods Shape changes were measured on 14 subjects using a keratometer modified to enable a change in focus to occur without a change in vergence. All subjects were emmetropic and their ages ranged from approximately 20 to 28 years. Results In 11 of the 14 subjects a difference in central corneal curvature, of around 0.4 D in at least one principal meridian, was found when focus was changed between distant and near targets. In 9 subjects the curvature was greater for near focus in at least one meridian. In 5 subjects the change in one meridian was opposite in effect to what would be expected, i.e. the curvature was greater at distance than at near. Conclusion The study suggests that accommodation may have some effect on corneal shape.

    AB - Purpose To investigate whether accommodation induces any changes in central corneal curvature. Methods Shape changes were measured on 14 subjects using a keratometer modified to enable a change in focus to occur without a change in vergence. All subjects were emmetropic and their ages ranged from approximately 20 to 28 years. Results In 11 of the 14 subjects a difference in central corneal curvature, of around 0.4 D in at least one principal meridian, was found when focus was changed between distant and near targets. In 9 subjects the curvature was greater for near focus in at least one meridian. In 5 subjects the change in one meridian was opposite in effect to what would be expected, i.e. the curvature was greater at distance than at near. Conclusion The study suggests that accommodation may have some effect on corneal shape.

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    Pierscionek BK, Popiolek-Masajada A, Kasprzak H. Corneal shape change during accommodation. EYE. 2001 Dec;15(Part 6):766-769.