Spaeth/Richman Contrast Sensitivity Test (SPARCS)
|Study Design:||Observational Model: Cohort
Time Perspective: Prospective
|Official Title:||Validation and Reproducibility of Spaeth/Richman Contrast Sensitivity Test|
- Contrast Sensitivity [ Time Frame: 1 day ]If this instrument is a user-friendly, highly specific and sensitive method of determining contrast sensitivity, without influence of acuity, a major advance will be made. It is conceivable that the test could be used for detection of visual disease globally because of ease of operation and availability. Increasing numbers of studies are showing that contrast sensitivity is highly related to patients' ability to perform activities of daily living. It is anticipated that using this technique may become the standard way of assessing visual ability.
|Study Start Date:||January 2010|
|Study Completion Date:||April 2014|
|Primary Completion Date:||April 2014 (Final data collection date for primary outcome measure)|
Objective: To test a new method of determining contrast sensitivity that does not require visual acuity and tests various areas of the visual field.
Hypothesis: A method of determining contrast sensitivity that does not require letter recognition (as in the Pelli-Robson test) eliminates the confounders of literacy and pattern recognition, and will permit a more valid determination of contrast sensitivity.
Patients will perform SPARCS and Pelli-Robson twice; once each with two separate observers for reproducibility and intra-observer reliability. The order of testing will be randomized to SPARCS, Pelli, Pelli, SPARCS or Pelli, SPARCS, SPARCS, Pelli.
Please refer to this study by its ClinicalTrials.gov identifier: NCT01300949
|United States, Pennsylvania|
|Wills Eye Institute|
|Philadelphia, Pennsylvania, United States, 19107|
|Principal Investigator:||George L Spaeth, MD||Glaucoma Service, Wills Eye Institute|