June 2013
Volume 54, Issue 15
Free
ARVO Annual Meeting Abstract  |   June 2013
Novel method to objectively evaluate visual comfort during sunglass use
Author Affiliations & Notes
  • George Zikos
    Institute for Vision Research, Manhattan Vision Associates, New York, NY
  • Samantha Slotnick
    Institute for Vision Research, Manhattan Vision Associates, New York, NY
  • Rocco Robilotto
    Institute for Vision Research, Manhattan Vision Associates, New York, NY
  • Arkady Selenow
    Institute for Vision Research, Manhattan Vision Associates, New York, NY
  • Steven Ali
    Institute for Vision Research, Manhattan Vision Associates, New York, NY
Investigative Ophthalmology & Visual Science June 2013, Vol.54, 585. doi:
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    • Get Citation

      George Zikos, Samantha Slotnick, Rocco Robilotto, Arkady Selenow, Steven Ali; Novel method to objectively evaluate visual comfort during sunglass use. Invest. Ophthalmol. Vis. Sci. 2013;54(15):585.

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

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Abstract
 
Purpose
 

Several studies connect visual comfort with squinting, and muscle tension (Nahar et al. 2007, Sheedy et al. 2005, Aaras et al. 2005). In a previous study we demonstrated that polarized lenses improve CSF and reaction times in a simulated driving environment (Zikos et al. 2009) We have further developed this method by adding simultaneous evaluation of pupil size and squint amount during either distance or a near task in the presence of glare, in order to further evaluate objectively different sunglass types.

 
Methods
 

Four subjects were tested during simulated outdoor distance and near activities: The distance task was similar to the 2009 investigation’s simulated driving environment (CSF and response times tested with Cambridge Research Systems Ltd. ViSaGe system). The near task included a reading task and FACT Near CSF in the presence of glare. A modified ISCAN eye movement system with IR cameras was used to track pupil and aperture size (squinting level) during testing. Three types of lenses were tested: polarized, tinted and clear.

 
Results
 

Both distance and near CSF results show increased contrast sensitivity when using polarized lenses vs. tinted or clear lenses. (mean increase 124% distance and 134% near). Pupil measurements were similar between the two sunglasses (Mean pupil size 4.2mm) Good correlation between measuring squint levels with ISCAN and photographically was found. Mean squint levels were 0.8mm less on average with the sunglasses.

 
Conclusions
 

The addition of measuring pupil size and squint levels may prove useful in objectively measuring comfort levels with different spectacle lenses.

 
Keywords: 718 spectacle lens • 754 visual acuity  
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