Ah, good idea. Maybe we could have a "pupil measuring session" during a star party at SPOC where instead of using a mirror we could go in the SPOC garage and have someone take pictures of those wishing to be measured. BTW, isn't 7.2mm a tad on the large size? patrick On 21 Jul 2010, at 01:37, Kim wrote:
I have used the following method to measure my pupil size: Set up a camera with a remote or cable release on a tripod in front of a mirror in a room that can be made completely dark. Focus the camera on your reflected image and prepare it to take a picture in the dark with the flash. (Beware not to use any redeye reduction pre-flash setting.) Turn out the lights and wait for your eyes to become completely dark adapted. Stand adjacent to the camera holding a subdivided millimeter scale next to your eye and take your picture. From the resulting image you can use the scale that you held by your eye to measure your fully dilated pupil size.
Last time I did this I measured my pupil to be about 7.2 mm in diameter.
Kim