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Table 1 Cup to disc ratio means and comparisons among the 3 brightness settings

From: The effect of photographic light brightness on cup to disc ratio grading

Mean c/d ± SD

Dark (n = 50)

Medium (n = 50)

Bright (n = 50)

0.47 ± 0.11

0.48 ± 0.11

0.53 ± 0.12

 

Dark vs. Medium

Dark vs. Bright

Medium vs. Bright

P value*

0.3030

< 0.0001

< 0.0001

  1. The mean c/d gradings for each of the 3 brightness groups, dark, medium, and bright, were compared to each of the others using paired t tests*; c/d (cup to disc ratio), SD (standard deviation)
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BMC Ophthalmology

ISSN: 1471-2415

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