September 2016
Volume 57, Issue 12
Open Access
ARVO Annual Meeting Abstract  |   September 2016
Effect of induced glare on pupil size in ocular healthy adults
Author Affiliations & Notes
  • Arlene Flores
    Graduate College of Biomedical Sciences, Western University of Health Sciences, Pomona, California, United States
  • Danica Quicho
    Graduate College of Biomedical Sciences, Western University of Health Sciences, Pomona, California, United States
  • Min Kong
    College of Optometry, Western University of Health Sciences, Pomona, California, United States
  • Cherell Lemons
    Graduate College of Biomedical Sciences, Western University of Health Sciences, Pomona, California, United States
  • Katalina Rowland
    College of Optometry, Western University of Health Sciences, Pomona, California, United States
  • Danielle Ringle
    College of Optometry, Western University of Health Sciences, Pomona, California, United States
  • Kaydee McCray
    College of Optometry, Western University of Health Sciences, Pomona, California, United States
  • Jennifer Kurtz
    College of Optometry, Western University of Health Sciences, Pomona, California, United States
  • Pinakin Gunvant Davey
    College of Optometry, Western University of Health Sciences, Pomona, California, United States
    Graduate College of Biomedical Sciences, Western University of Health Sciences, Pomona, California, United States
  • Footnotes
    Commercial Relationships   Arlene Flores, None; Danica Quicho, None; Min Kong, None; Cherell Lemons, None; Katalina Rowland, None; Danielle Ringle, None; Kaydee McCray, None; Jennifer Kurtz, None; Pinakin Davey, M&S Systems (C)
  • Footnotes
    Support  None
Investigative Ophthalmology & Visual Science September 2016, Vol.57, 4564. doi:
  • Views
  • Share
  • Tools
    • Alerts
      ×
      This feature is available to Subscribers Only
      Sign In or Create an Account ×
    • Get Citation

      Arlene Flores, Danica Quicho, Min Kong, Cherell Lemons, Katalina Rowland, Danielle Ringle, Kaydee McCray, Jennifer Kurtz, Pinakin Gunvant Davey; Effect of induced glare on pupil size in ocular healthy adults. Invest. Ophthalmol. Vis. Sci. 2016;57(12):4564.

      Download citation file:


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

      ×
  • Supplements
Abstract

Purpose : Glare testing in clinical setting is complicated due to the lack of clear gold standard. This becomes particularly important when evaluating for cataract surgery where decisions are made on the basis of changes in visual performance with glare. We sought to investigate two calibrated glare inducing systems and evaluate the change in pupil size when the light levels were standardized.

Methods : One hundred eyes of 50 individuals in age range 20 to 35 were included in the study. Subjects underwent an ocular health examination that included vision testing, fundus photography and measurements with Optical Coherence Tomography. The glare units were placed at 8 feet viewing distance from the subject. The glare system 1 (GS1) involves LED light illumination and is constructed with four LED lights at four corners of the monitor. The glare system 2 is a retro illuminated chart with two halogen lamps placed at either side of the box. The background illumination of GS1 and GS 2 system measured at 1 foot was 3 and 25 lux. With the glare levels turned on both units were set at 48 lux. Pupillary measurements were obtained twice using NeurOptics® VIP™-200 with glare system off and glare system turned on.

Results : Figure 1 provides the pupil size with and without induced glare. The baseline pupil measurements when inducing glare GS1 LED system had pupil size of 5.93 which decreased to 4.01 mm with glare. The baseline pupil measurements when inducing glare GS2 halogen system had pupil size of 5.46 which decreased to 3.96 mm with glare. The change in pupil size was significant with both glare systems (Paired samples t-test t=23.77; p<0.001 and t=23.41; p<0.001). The pupil measurements without the glare lights on was different when using the GS1 versus GS2 with pupil 0.47 mm larger when using GS1 (Independent samples t-test t= 7.29; p<0.001). The pupil size was not significantly different when the glare lights were turned on (Independent samples t-test t= 1.12; p=0.26).

Conclusions : Difference in background illumination of glare systems caused a measurable difference in pupil size at baseline. The calibration of glare systems is an important factor in predicting the outcome of visual performance and should be considered when using different glare units. The pupil size is not affected by the glare source; LED versus Halogen.

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.

×