September 2016
Volume 57, Issue 12
Open Access
ARVO Annual Meeting Abstract  |   September 2016
Real World Through Focus Curve of a New Multifocal Contact Lens
Author Affiliations & Notes
  • Michel Guillon
    Ocular Technology Group International, London, United Kingdom
    School of Life and Health Sciences , Aston University, Aston, United Kingdom
  • Kathryn Dumbleton
    Ocular Technology Group International, London, United Kingdom
  • Kishan Patel
    Ocular Technology Group International, London, United Kingdom
  • Trisha Patel
    Ocular Technology Group International, London, United Kingdom
  • Tom Karkkainen Karkkainen
    Johnson & Johnson Vision Care Inc., Jacksonville, Florida, United States
  • Kurt Moody
    Johnson & Johnson Vision Care Inc., Jacksonville, Florida, United States
  • Jing Xu
    Johnson & Johnson Vision Care Inc., Jacksonville, Florida, United States
  • Ron Clark
    Johnson & Johnson Vision Care Inc., Jacksonville, Florida, United States
  • Footnotes
    Commercial Relationships   Michel Guillon, Johnson & Johnson Vision Care Inc. (F), Johnson & Johnson Vision Care Inc. (C), Johnson & Johnson Vision Care Inc. (R); Kathryn Dumbleton, Johnson & Johnson Vision Care Inc. (F); Kishan Patel, Johnson & Johnson Vision Care Inc. (F); Trisha Patel, Johnson & Johnson Vision Care Inc. (F); Tom Karkkainen, Johnson & Johnson Vision Care Inc. (E); Kurt Moody, Johnson & Johnson Vision Care Inc. (E); Jing Xu, Johnson & Johnson Vision Care Inc. (E); Ron Clark, Johnson & Johnson Vision Care Inc. (E)
  • Footnotes
    Support  None
Investigative Ophthalmology & Visual Science September 2016, Vol.57, 1481. doi:
  • Views
  • Share
  • Tools
    • Alerts
      ×
      This feature is available to Subscribers Only
      Sign In or Create an Account ×
    • Get Citation

      Michel Guillon, Kathryn Dumbleton, Kishan Patel, Trisha Patel, Tom Karkkainen Karkkainen, Kurt Moody, Jing Xu, Ron Clark; Real World Through Focus Curve of a New Multifocal Contact Lens. Invest. Ophthalmol. Vis. Sci. 2016;57(12):1481.

      Download citation file:


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

      ×
  • Supplements
Abstract

Purpose : The Through Focus Curve (TFC) is often used to characterise visual performance of multifocal contact lenses (MCL) and intra ocular lenses over a range of defocus. Typically negative lenses are used to produce vergences but this requires accurate lens centration and trial lenses may interfere with binocularity. The objective was to characterize a new MCL using a new clinical test paradigm, measuring visual acuity (VA) at the actual distances of interest, allowing normal convergence and both binocular and monocular measurements.

Methods : Monocular, binocular (B) and binocular summation (BS) TFCs were obtained by measuring logMAR VA at 6 distances (40cm, 50cm, 67cm, 1m, 2m & 4m) for 3 luminances (250cd/m2 daytime and computer use, 50cd/m2 indoor evening & 2.5cd/m2 night driving). The measurements were made with OTG-i Vision using a 4K screen at distance, an iPad 2 Air (retina) for intermediate and an iPad mini (retina) for near, all driven by a dedicated App. The study MCL was 1-DAY ACUVUE® MOIST Brand MULTIFOCAL. The study population (age 51.7 ± 7.37) comprised 7 low, 10 medium and 13 high addition subjects.

Results : (i) Mean BVA at 250cd/m2 was < 0.0 logMAR (>20.20) at all distances. The best BVA was achieved at 2m (-0.19 logMAR 20/13) and the lowest at 40cm (-0.04 logMAR 20/18);
(ii) Mean BVA at 50cd/m2 was lower than at 250cd/m2 by 1 line at distance (+0.1 logMAR), 1.2 lines at intermediate (+0.12 logMAR) and 1.4 lines at near (+0.14 logMAR) maintaining a balanced performance for all distances;
(iii) Mean BVA at 2.5cd/m2 was biased for distance, with 2.5 lines (0.25 logMAR) loss compared with 250cd/m2 giving a mean VA of 20/25;
(iv) Differences in VA between dominant and non-dominant eyes were small, at most 1/3 of a line (mean differences -0.025 to + 0.029 logMAR); with a trend to favour the dominant eye at distance and the non-dominant eye at near;
(v) BS was most marked at distance (mean -0.01 to -0.04 logMAR), demonstrating that the MCL were not biased towards modified monovision maintaining binocularity.

Conclusions : This novel “real world” clinical technique was able to fully characterise the TFC performance of the study MCL, demonstrating excellent performance at high luminance while maintaining balanced VA at all distances at medium luminance and a bias towards distance at low luminance (night driving). In addition monocular and binocular VA measurements have confirmed binocular summation with the MCL.

This is an abstract that was submitted for the 2016 ARVO Annual Meeting, held in Seattle, Wash., May 1-5, 2016.

×
×

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.

×