Latham_Hughes_2013.pdf (268.84 kB)
Is a reading addition necessary for clinical contrast sensitivity measurements?
posterposted on 2023-07-26, 13:14 authored by Keziah Latham, Julie A. Hughes
Purpose: Clinical tests of contrast sensitivity are performed at near with letters large enough to be above the acuity threshold of presbyopes with normal vision. Is a reading addition necessary to obtain accurate thresholds? Method: Contrast sensitivity was assessed using Pelli-Robson and Mars charts. Participants were presbyopes with normal or corrected-to-normal distance and near acuity. Contrast sensitivity was assessed with participants wearing distance refractive correction, and also wearing an appropriate addition for the working distance (+0.75DS for the Pelli-Robson at 1m; +2.00DS for the Mars at 50cm). Results: The difference between contrast sensitivity measurements made with and without the reading addition was not signiﬁ cant for either chart (repeated measures t-test, p>0.05 for Pelli-Robson and Mars). Conclusion: Contrast sensitivity can be assessed in presbyopic visual normals with patients wearing either distance or near correction without affecting thresholds.
Name of eventEuropean Academy of Optometry and Optics Annual Conference
Event start date2013-04-19
Event finish date2013-04-21
- Published version