Comparison of M&S Smart System letter contrast sensitivity and Ridgevue test for iPad results with Pelli-Robson in normally-sighted individuals

Title Comparison of M&S Smart System letter contrast sensitivity and Ridgevue test for iPad results with Pelli-Robson in normally-sighted individuals
Author, Co-Author Rachel Ruben, Susan Kelly, Shin Gerth
Topic Functional Vision/Pediatrics
Year
2016
Day
Thursday
Program Number
165165
Room
Ballroom A-B
Affiliation
Abstract

Purpose: The purpose of the study was to compare the reliability of two digital letter-based contrast sensitivity (CS) tests – Ridgevue Contrast Sensitivity for iPad and the M&S Smart System Letter Contrast Sensitivity test (MS) – with the established but no longer in print Pelli-Robson (PR) test.

Methods: Seventeen normally-sighted participants were tested monocularly with each test wearing their habitual correction, in randomized order. Testing was repeated in the same eye for each subject during a second visit at least 3 days after initial testing. Repeatability between the two test administrations, as well as agreement between the three tests were assessed using the 95% limits of agreement ± 1.96 SD of the differences between each administration or test.

Results: The three tests varied in repeatability between administrations: PR =  ±0.20, iPad = ±0.33, and MS = ±0.59. Agreement between tests was: PR vs iPad = ±0.32, PR vs MS = ±0.57, and MS vs iPad = ±0.50.

Conclusions: Three tests for contrast sensitivity were compared in a normally-sighted population. The established Pelli-Robson chart demonstrated the best repeatability. The CS test for iPad was found to have better repeatability and agreement with the Pelli-Robson chart than the M&S test.

Affiliation of Co-Authors Illinois College of Optometry, Illinois College of Optometry
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