5 Questions
What is the most common iris colour according to the Newborn Eye Screening Test study?
Brown
What was the frequency of change from blue to non-blue iris colours?
27%
Which iris colour was less likely to change over time compared to non-brown iris colours?
Brown
What percentage of parents responded at the 2-year follow-up in the Newborn Eye Screening Test study?
73%
What did the twin studies show about eye colour?
Some environmental factors are associated with eye colour
Study Notes
Iris Colour and Changes
- The most common iris colour is blue, according to the Newborn Eye Screening Test study.
- In the study, 53.4% of infants had blue irises at birth, which decreased to 41.1% at 2 years.
- The frequency of change from blue to non-blue iris colours was 44.7%.
Iris Colour Stability
- Brown iris colour was less likely to change over time compared to non-brown iris colours.
Study Response Rate
- At the 2-year follow-up, 83.4% of parents responded to the Newborn Eye Screening Test study.
Twin Studies and Eye Colour
- Twin studies showed that genetic factors play a significant role in determining eye colour, with a heritability of 0.95.
Test your knowledge of eye color genetics and color vision with this quiz. Learn about the factors that determine eye color and how it can change with age. Explore the genetic and environmental influences on eye color through engaging questions.
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