May 2004
Volume 45, Issue 13
ARVO Annual Meeting Abstract  |   May 2004
Comfort and vision with inverted soft contact lenses
Author Affiliations & Notes
  • N. Tahhan
    Vision CRC, UNSW, Sydney, Australia
  • L. Rodriguez
    Vision CRC, UNSW, Sydney, Australia
  • A. Demir
    Vision CRC, UNSW, Sydney, Australia
  • T. John
    Vision CRC, UNSW, Sydney, Australia
  • E. Papas
    Vision CRC, UNSW, Sydney, Australia
  • B. Holden
    Vision CRC, UNSW, Sydney, Australia
  • P. Caroline
    College of Optometry, Pacific University, Forest Grove, OR
  • Footnotes
    Commercial Relationships  N. Tahhan, None; L. Rodriguez, None; A. Demir, None; T. John, None; E. Papas, None; B. Holden, None; P. Caroline, None.
  • Footnotes
    Support  none
Investigative Ophthalmology & Visual Science May 2004, Vol.45, 1536. doi:
  • Views
  • Share
  • Tools
    • Alerts
      This feature is available to authenticated users only.
      Sign In or Create an Account ×
    • Get Citation

      N. Tahhan, L. Rodriguez, A. Demir, T. John, E. Papas, B. Holden, P. Caroline; Comfort and vision with inverted soft contact lenses . Invest. Ophthalmol. Vis. Sci. 2004;45(13):1536.

      Download citation file:

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

  • Supplements

Abstract: : Purpose: The aim of this trial is to compare the vision and subjective comfort of three commercially available brands of soft contact lenses when inverted to when worn the correct way. Methods: Ten subjects participated in multiple, 20 minute, contralateral, double masked randomised studies. In each trial, subjects wore an inverted lens in one eye and the same lens type, correctly inserted in the contralateral eye. Twelve lenses were tested and these include; Focus Night & Day (BC 8.4 and BC 8.6), Purevision and Acuvue 2. All lens types were tested in powers of +3 and –3. Subjective ratings of vision and comfort (scale 1–100) were recorded at baseline and after 20 minutes of lens wear. Results were analysed using Student's paired t–tests. Results: At baseline, there was no significant difference between subject's right and left eyes for subjective ratings and visual acuities. After 20 minutes of wear, significantly worse vision and comfort ratings between lenses inverted and those inserted the correct way was found for the Acuvue lenses (all p<0.01). There were also significantly worse comfort ratings for the Purevision lenses (p<0.02) but vision was not significantly different. Comfort and vision was not significantly worse for any of the Focus Night & Day (BC 8.4) lenses and –3 (BC 8.6) lenses. Comfort was worse for the +3 BC 8.6) lenses (p=0.02) but not vision. Conclusions: Practitioners generally advise their patient's that if lenses are incorrectly inserted, they are likely to become aware of reduced comfort or vision. From our results, this holds true for Acuvue 2 lenses, but not for the silicone hydrogel lenses tested.

Keywords: contact lens • cornea: clinical science 

This PDF is available to Subscribers Only

Sign in or purchase a subscription to access this content. ×

You must be signed into an individual account to use this feature.