• myGriffith
    • Staff portal
    • Contact Us⌄
      • Future student enquiries 1800 677 728
      • Current student enquiries 1800 154 055
      • International enquiries +61 7 3735 6425
      • General enquiries 07 3735 7111
      • Online enquiries
      • Staff phonebook
    View Item 
    •   Home
    • Griffith Research Online
    • Journal articles
    • View Item
    • Home
    • Griffith Research Online
    • Journal articles
    • View Item
    JavaScript is disabled for your browser. Some features of this site may not work without it.

    Browse

  • All of Griffith Research Online
    • Communities & Collections
    • Authors
    • By Issue Date
    • Titles
  • This Collection
    • Authors
    • By Issue Date
    • Titles
  • Statistics

  • Most Popular Items
  • Statistics by Country
  • Most Popular Authors
  • Support

  • Contact us
  • FAQs
  • Admin login

  • Login
  • Regional variations in postlens tear layer thickness during scleral lens wear

    Author(s)
    Vincent, SJ
    Alonso-Caneiro, D
    Collins, MJ
    Griffith University Author(s)
    Alonso-Caneiro, David
    Year published
    2020
    Metadata
    Show full item record
    Abstract
    Objectives: To quantify regional variations in the postlens tear layer (PLTL) thickness during scleral lens wear. Methods: Fifteen healthy adults (2263 years) with normal corneae were fitted with a 16.5-mm-diameter rotationally symmetric scleral lens in one eye. The PLTL thickness was measured across the central 5 mm at 0, 15, 30, 45, 60, 90, 120, 240, and 480 min after lens insertion using a 12 radial line scan optical coherence tomography imaging protocol. Regional analyses were conducted by dividing the PLTL into 8 equal 45° segments. Results: A tilted optic zone was observed immediately after lens insertion with the ...
    View more >
    Objectives: To quantify regional variations in the postlens tear layer (PLTL) thickness during scleral lens wear. Methods: Fifteen healthy adults (2263 years) with normal corneae were fitted with a 16.5-mm-diameter rotationally symmetric scleral lens in one eye. The PLTL thickness was measured across the central 5 mm at 0, 15, 30, 45, 60, 90, 120, 240, and 480 min after lens insertion using a 12 radial line scan optical coherence tomography imaging protocol. Regional analyses were conducted by dividing the PLTL into 8 equal 45° segments. Results: A tilted optic zone was observed immediately after lens insertion with the greatest PLTL asymmetry between nasal and temporal regions (156622 mm more clearance temporally) and superior nasal and inferotemporal regions (124612 mm more clearance inferotemporally). The magnitude of lens settling observed in each region was associated with the initial PLTL (r¼0.59–0.77, P#0.02). The superior nasal PLTL furthest from the pupil center stabilized after 90 min compared with other regions which stabilized after 4 hr. On average, after 8 hr of lens wear, the PLTL decreased by 29% and PLTL asymmetries between opposing regions decreased by 30%. Conclusions: The PLTL was thickest temporally and thinnest nasally in healthy eyes fitted with rotationally symmetric scleral lenses, most likely because of regional differences in underlying scleral elevation, eyelid forces, and lens centration. Postlens tear layer asymmetries diminished with lens wear, and stabilization occurred more rapidly in regions with less corneal clearance immediately after lens insertion.
    View less >
    Journal Title
    Eye and Contact Lens
    Volume
    46
    Issue
    6
    DOI
    https://doi.org/10.1097/ICL.0000000000000676
    Subject
    Ophthalmology and optometry
    Publication URI
    http://hdl.handle.net/10072/413536
    Collection
    • Journal articles

    Footer

    Disclaimer

    • Privacy policy
    • Copyright matters
    • CRICOS Provider - 00233E
    • TEQSA: PRV12076

    Tagline

    • Gold Coast
    • Logan
    • Brisbane - Queensland, Australia
    First Peoples of Australia
    • Aboriginal
    • Torres Strait Islander