Contrast Sensitivity

Uses

Evidence quality

Other

Highlighted claims

• The primary outcome is the change in contrast sensitivity at 6 cycles per degree from baseline to 12 months. — Effect of carotenoids supplementation on visual function in Chinese adults free of retinal disease: protocol for the CSV double-blind, randomised, placebo-controlled trial
• Contrast sensitivity is measured across five spatial frequencies using the M&S clinical contrast sensitivity measurement tool. — Effect of carotenoids supplementation on visual function in Chinese adults free of retinal disease: protocol for the CSV double-blind, randomised, placebo-controlled trial
• The trial focuses on contrast sensitivity because it is a sensitive indicator of visual performance and relevant to daily visual tasks. — Effect of carotenoids supplementation on visual function in Chinese adults free of retinal disease: protocol for the CSV double-blind, randomised, placebo-controlled trial
• Prior sample-size assumptions were based on evidence that carotenoid supplementation increased contrast sensitivity at 6 cycles per degree by 0.08 units after 12 months. — Effect of carotenoids supplementation on visual function in Chinese adults free of retinal disease: protocol for the CSV double-blind, randomised, placebo-controlled trial
• The trial emphasises 6 cycles per degree because it reflects everyday visual demands and is sensitive to AMD-related impairment. — Effect of carotenoids supplementation on visual function in Chinese adults free of retinal disease: protocol for the CSV double-blind, randomised, placebo-controlled trial