lecture 3 BIMM-09

lecture 3 BIMM-09 - Environmental contributions to myopia...

Info iconThis preview shows pages 1–4. Sign up to view the full content.

View Full Document Right Arrow Icon
1 Environmental contributions to myopia Inuit people aged 15-29 who had attended modern schools and as a consequence did a lot of reading had a 20 to 40% rate of myopia (males, females, respectively). Among the young, there was a correlation between frequency of school attendance and myopia. Among older individuals (plus 30 years), who had little childhood schooling, only 3-5% were myopic. Aged relatives of myopic youngsters did not seem to have higher rates of myopia. The above evidence is epidemiological, (i.e. looking for correlations between human disease and environmental factors). Such evidence is common in studies of human disease. Properly controlled experiments on humans are ruled out, and designing animal studies to understand the causes of myopia are challenging.
Background image of page 1

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
2 Interesting and plausible models . . . and scientifc evidence Are there other potential explanations (besides early childhood close Focusing in dim light) For increased myopia among young Inuit. Yes, many diFFerent explanations that a creative, dispassionate, researcher could imagine. "Control experiments" include extensive interviews with all study participants looking For any other environmental diFFerences that correlate with myopia. So what can we conclude? The confdence oF our conclusions depends on how many other plausible explanations For causes oF myopia that we can eliminate by demonstrating a lack oF correlation with other plausible environmental diFFerences and development oF myopia.
Background image of page 2
3 Two minute question/answers from last lecture: What are two types of evidence that modern humans (the animal species Homo sapiens ) originated in East Africa roughly 150,000 years ago? Excellent Answer 1) The oldest recovered remains of anatomically modern humans come from East Africa, in strata that are about 150K years old.
Background image of page 3

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
Image of page 4
This is the end of the preview. Sign up to access the rest of the document.

This note was uploaded on 03/31/2009 for the course BIMM BIMM 110 taught by Professor Mcginnis during the Winter '09 term at UCSD.

Page1 / 36

lecture 3 BIMM-09 - Environmental contributions to myopia...

This preview shows document pages 1 - 4. Sign up to view the full document.

View Full Document Right Arrow Icon
Ask a homework question - tutors are online