Contrast Sensitivity Testing in Visually Normal Individuals: Letter vs. Continuous Text

Contrast Sensitivity Testing in Normal Vision: Performance with Letter vs. Continuous Text

Introduction: Contrast sensitivity is a visual element used in optometric examinations to help assess visual capacity. This study compared two formats of contrast sensitivity tests, ETDRS Letters and Continuous Text. Methods: Contrast sensitivity was measured in 75 subjects, who met inclusion criteria, using the Adult Near Contrast Test. Patients’ verbal readings provided data for the formats a...

Visual acuity vs letter contrast sensitivity in retinitis pigmentosa

This study examined the quantitative relationship between foveal visual acuity and contrast sensitivity for large-letter optotypes in a group of patients with retinitis pigmentosa (RP), in order to assess more completely the extent of foveal vision loss in this group of hereditary retinal dystrophies. High-contrast visual acuity and large-letter contrast sensitivity were measured with a compute...

Takagi Glare Tester CGT-1000 for contrast sensitivity and glare testing in normal individuals and cataract patients.

PURPOSE To investigate the sensitivity and repeatability of the Takagi Contrast Glare Tester CGT-1000 in normal individuals and those with cataracts. METHODS A prospective observational study was performed. The Takagi Contrast Glare Tester measures contrast sensitivity (CS) at 6 target sizes and 13 contrast levels (2.00 to 0.34 logCS). Testing follows a method of descending limits paradigm wi...

Contrast sensitivity for letter optotypes vs. gratings under conditions biased toward parvocellular and magnocellular pathways

This study examined the extent to which letter optotypes and grating stimuli provide equivalent measures of contrast sensitivity under conditions designed to favor the magnocellular (MC) and parvocellular (PC) pathways. The contrast sensitivity functions (CSFs) of three visually normal observers were measured for Sloan letters and Gabor patches, using steady- and pulsed-pedestal paradigms to bi...

Testing and reporting contrast sensitivity.