SPARCS and Pelli-Robson contrast sensitivity testing in normal controls and patients with cataract

Area of Science:

• Ophthalmology
• Visual Science
• Medical Devices

Background:

• Cataract significantly impacts visual function, including contrast sensitivity.
• Accurate assessment of contrast sensitivity is crucial for evaluating visual impairment in cataract patients.
• Existing tests like the Pelli- Robson (PR) primarily assess central vision.

Purpose of the Study:

• To evaluate the efficacy of the internet-based Spaeth/Richman Contrast Sensitivity (SPARCS) test.
• To compare SPARCS's ability to assess central and peripheral contrast sensitivity against the Pelli- Robson (PR) test.
• To determine the test-retest reliability of the SPARCS test in cataract subjects and controls.

Main Methods:

• A prospective, cross-sectional study involving cataract subjects and age-matched controls.
• Contrast sensitivity was measured twice for each eye using both SPARCS and PR tests in a randomized order.
• SPARCS assessed central and four peripheral quadrants; PR assessed central vision only.

Main Results:

• Both SPARCS and PR tests showed significantly reduced contrast sensitivity in cataract subjects compared to controls (P=0.001 for SPARCS central, P<0.001 for PR).
• Test-retest reliability was acceptable for both tests, with ICC values of 0.75 for PR and 0.61 for SPARCS.
• SPARCS demonstrated good agreement with PR in detecting the effect of cataract on central contrast sensitivity.

Conclusions:

• Both the SPARCS and PR tests effectively demonstrate the negative impact of cataracts on contrast sensitivity.
• The SPARCS test provides a comprehensive assessment by measuring both central and peripheral contrast sensitivity.
• SPARCS offers an advantage due to its internet-based platform and independence from literacy, enhancing accessibility.