I had my pupils dilated at the eye doctor a few years ago and I really did not enjoy the experience at all. I know they had to do it for a good reason but I hope I never need it done again! After they dilate your pupils it literally takes hours for them to go back to normal....
Whether or not you’ll need eye dilation during your next examdepends onthe reason for your exam, your age, your overall health, and your risk of eye diseases. More often than not, eye doctorspreferto dilate your pupils so that they can fully evaluate your macula, retina and optic nerve....
One recent study showed that the pupils of male subjects dilated when they viewed images of women they found sexually attractive, whereas the pupils of female subjects typically dilated in response to images of attractive men and women alike. The study authors concluded the reason for this is unc...
yet I use exit pupils of 5-5.3mm all the time at low power and do not notice the secondary shadow. If I look at the Moon at that low a power, my pupil shuts down to 1.5mm and the secondary shadow covers most of the light. So I don't look at the moon at ...
Now, I'm sure people will argue that you need larger exit pupils to see the big objects well, or to use nebula filters, or simply to get a large enough field for star-hopping. But is that true? Take the ubiquitous 8" f/6 scope with a 1200mm focal length. ...
That is one way I know the Orion Nebula is really bright--I can feel my pupils constrict! The other two ways are 1) I can see color in the nebula, and 2) when I look at the sky right after looking at the nebula, there is a dark area in the middle of my vision where the lig...