April 2014
Volume 55, Issue 13
Free
ARVO Annual Meeting Abstract  |   April 2014
Ocular surface displacement with and without contact lenses during non-contact tonometry
Author Affiliations & Notes
  • Ulfah Rimayanti
    Ophthalmology and Visual Science, Hiroshima University, Hiroshima, Japan
    Faculty of Health Sciences, UIN Alauddin Makassar, Makassar, Indonesia
  • Yoshiaki Kiuchi
    Ophthalmology and Visual Science, Hiroshima University, Hiroshima, Japan
  • Shohei Uemura
    Mechanical Engineering, Osaka University, Osaka, Japan
  • Joji Takenaka
    Mechanical Engineering, Osaka University, Osaka, Japan
  • Hideki Mochizuki
    Ophthalmology and Visual Science, Hiroshima University, Hiroshima, Japan
  • Makoto Kaneko
    Mechanical Engineering, Osaka University, Osaka, Japan
  • Footnotes
    Commercial Relationships Ulfah Rimayanti, None; Yoshiaki Kiuchi, None; Shohei Uemura, None; Joji Takenaka, None; Hideki Mochizuki, None; Makoto Kaneko, None
  • Footnotes
    Support None
Investigative Ophthalmology & Visual Science April 2014, Vol.55, 2465. doi:
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    • Get Citation

      Ulfah Rimayanti, Yoshiaki Kiuchi, Shohei Uemura, Joji Takenaka, Hideki Mochizuki, Makoto Kaneko; Ocular surface displacement with and without contact lenses during non-contact tonometry. Invest. Ophthalmol. Vis. Sci. 2014;55(13):2465.

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      © ARVO (1962-2015); The Authors (2016-present)

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Abstract 
 
Purpose
 

To evaluate the displacement of the central ocular surface during non-contact tonometry with and without soft contact lenses and determine the factors associated with the displacement of the central ocular surface and intraocular pressure (IOP) reading changes caused by wearing soft contact lenses (CLs).

 
Methods
 

One eye each in 21 subjects was studied. The cornea was photographed by a high speed camera at 5000 frames/sec during non-contact tonometry without contact lenses (NCL), with -5.0 diopters (D), -0.5 D and +5.0 D CL. The displacement of the ocular surface during the early phase (10-14.8 ms after an air puff application), the IOP readings phase (15-19.2 ms), the maximum displacement phase (19.4-23.6 ms) were averaged, and the factors affecting displacement were evaluated.

 
Results
 

The IOP readings while wearing +5 D CL were significantly higher than those obtained while wearing -5 D CL. The ocular surface displacement between -5 D CL and +5 D CL, NCL and + 5 D CL during the early phase was significantly different. The average ocular surface displacements in the +5 D CL group during the IOP reading and maximum displacement phases were significantly different from that observed in the other groups. Significant positive correlation was found between the ocular surface displacement of subjects at the IOP reading time and the IOP obtained with non-contact tonometry. The radius of curvature of the ocular surface affected the displacement during the IOP reading and maximum displacement phases.

 
Conclusions
 

Our results indicate that soft contact lens use changes IOP readings and the ocular surface displacement during non-contact tonometry. The radius of curvature of the eye affects the extent of displacement and IOP readings in those with and without contact lenses.

 
 
The average of central ocular surface displacement of subjects
 
The average of central ocular surface displacement of subjects
 
 
The relationship between the ocular surface displacement at the IOP reading time and IOP
 
The relationship between the ocular surface displacement at the IOP reading time and IOP
 
Keywords: 479 cornea: clinical science • 477 contact lens • 568 intraocular pressure  
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