Calculating Pupil Dilation!

On Monday, I had some fun applying math to how light affects the pupils! My previous post shows a photo that they took of my pupils under red light. During this session, I printed 90 photos of different subjects' pupils under brighter and darker red light! Then I measured each pupil to see whether the brightness in light affected the dilation.
In each photo they hold a ruler up to the subject's eye in order for comparison once the photo is printed. -So, I took the distance of the pupil (D, what I'm looking for) and divided it by the measurement on the ruler in mm of the pupil. So, for example, if the measurement was 6mm then D/6.
-Then I set the fraction equal to the special 3D measurement (I used a special measuring tool that the lab had created) of the pupil over the special 3D measurement of the ruler. So, for example, D/6 = 59.78/60.92 (usually the 3D measurements are not very far away from each other).
-Then I solved for D, which, in this case, would be ~5.88! So 5.88 is the measurement of the pupil! Here's a photo of my work:

Testing Light Eye Wear

Hi guys! This week we mostly were trying to figure out how to set up a video camera for taking images of people's pupil dilations, so there wasn't much going on. But I was able to try on lighted glasses of different colors so that they could test the new camera out! I wore glasses with white, blue, green, and red lights in a dark room and Brittany took photos of my pupils. My eyes hurt the worst when I was wearing the white light glasses, the light was just so bright! I have no idea how subjects of the studies can take it!!!! My pupils must have become pretty small because of the intensity of light but it was hard to see that in the photo that the new camera took. Here's a picture of my eye while wearing red lighted glasses though. My pupils are less dilated while wearing these glasses than while wearing the other glasses because the light is not as intense. These glasses were definitely most comfortable for my eyes. While wearing the red lighted glasses, a subject's melatonin levels will not suppress as greatly as they would while wearing white, blue, or green lighted glasses.