April 2014
Volume 55, Issue 13
Free
ARVO Annual Meeting Abstract  |   April 2014
SPARCS: A novel assessment of contrast sensitivity and its validity in patients with refractive error
Author Affiliations & Notes
  • Yi Sun
    Wills Eye Institution, Philadelphia, PA
    Opthalmology, West China Hospital, Chengdu, China
  • Elif Erdem
    Wills Eye Institution, Philadelphia, PA
  • Andrew Lyu
    Wills Eye Institution, Philadelphia, PA
  • Camila Zangalli
    Wills Eye Institution, Philadelphia, PA
  • Sheryl S Wizov
    Wills Eye Institution, Philadelphia, PA
  • Dave Lo
    Wills Eye Institution, Philadelphia, PA
  • Eric Spaeth
    Wills Eye Institution, Philadelphia, PA
  • Jesse Richman
    Wills Eye Institution, Philadelphia, PA
  • George L Spaeth
    Wills Eye Institution, Philadelphia, PA
  • Footnotes
    Commercial Relationships Yi Sun, None; Elif Erdem, None; Andrew Lyu, None; Camila Zangalli, None; Sheryl Wizov, None; Dave Lo, None; Eric Spaeth, 8,042,946 (P); Jesse Richman, 8,042,946 (P); George Spaeth, 8,042,946 (P), Pfizer Ophthalmics (F)
  • Footnotes
    Support None
Investigative Ophthalmology & Visual Science April 2014, Vol.55, 2711. doi:
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      Yi Sun, Elif Erdem, Andrew Lyu, Camila Zangalli, Sheryl S Wizov, Dave Lo, Eric Spaeth, Jesse Richman, George L Spaeth; SPARCS: A novel assessment of contrast sensitivity and its validity in patients with refractive error. Invest. Ophthalmol. Vis. Sci. 2014;55(13):2711.

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

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Abstract
 
Purpose
 

To explore the reliability and vadility of Spaeth Richman contrast sensitivity(SPARCS) test; to assess the contrast sensitivity distribution among various refractive errors.

 
Methods
 

93 individuals (182 eyes) with varying amounts of refractive errors were included in this study, divided into six groups according to their spherical equivalent. Contrast sensitivities were assessed using Pelli-Robson chart(PRC) and SPRACS instrument. Each eye was tested twice for each measurement. Outcomes including the correlation of PRC and SPARCS scores and the test-retest agreement of the two measurements were analyzed; the distribution of contrast sensitivity among the six groups was compared.

 
Results
 

Pearson correlation analysis showed a statistically significant correlation between SPARCS scores and PRC scores(P<0.01). Reliability analysis showed SPARCS had better test-retest agreement than PRC, with SPARCS exhibiting a higher intraclass coefficient(ICC=0.635). There were no significant differences in contrast sensitivity scores among the six refractive groups, for both measurements.

 
Conclusions
 

SPARCS seems to be an accessible, easy-to-perform, reliable and valid internet-based assessment for contrast sensitivity. The difference in contrast sensitivity among myopes, emmetropes, hyperopes was insignificant.

 
 
SPARCS image presentation: initial screen setting
 
SPARCS image presentation: initial screen setting
 
 
SPARCS image presentation: square-wave grating presentation in the Right Upper Quadrant
 
SPARCS image presentation: square-wave grating presentation in the Right Upper Quadrant
 
Keywords: 478 contrast sensitivity  
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