 |
 | Home | Contact Us | FAQ | Search & Site Map | Link to Us |
 | Sign In | Join | Other 45 Sites in Network |
Medical Forum / General / Vision / October 2005pupil dilation & halos on bright lights
My eyes were checked inside and I have pupil dilation drops near the after. My iris got wide and my lens accomodation is affected for hours. At night. I can see all point sources light sparkling. Can anyone explain this? I own telescopes but no more how big it is, it never sees point sources as sparkling with halos. How come wide pupillary dilation can cause halos? Kyle Because the outermost parts of the cornea have lots of aberrations, which are not involved with normal pupil size. The Designer made the peripheral cornea for structural support, not for vision. w.stacy, o.d. > My eyes were checked inside and I have pupil dilation > drops near the after. [quoted text clipped - 10 lines] > > Kyle > Because the outermost parts of the cornea have lots of aberrations, > which are not involved with normal pupil size. The Designer made the > peripheral cornea for structural support, not for vision. > > w.stacy, o.d. Know what is the aberrations called. I am a telescope hobbyists. I know about spherical abberations, coma, astigmatism, turned down edge, glass roughness. I wonder what could be the equivalent in the cornea. Any idea? With the complexities of the human eye with rods, cones, optic nerve and the fact that blood is pumpued thru them every second from the heart. I wonder if natural evolution can create such. Or is there really a Designer of some kind. Kyle > > My eyes were checked inside and I have pupil dilation > > drops near the after. [quoted text clipped - 10 lines] > > > > Kyle > Know what is the aberrations called. I am a telescope hobbyists. > I know about spherical abberations, coma, astigmatism, turned > down edge, glass roughness. I wonder what could be the > equivalent in the cornea. Any idea? Yes. The first 3 problems you described are part of every optical system, living or manufactured. Wavefront / flying spot laser techniques allow surgeons to correct for the principal aberrations (spherical and coma) as well as sphere power and astigmatism. Look up the term "Zernicke polynomial" for a description of the math used to describe these aberrations. -MT > > Know what is the aberrations called. I am a telescope hobbyists. > > I know about spherical abberations, coma, astigmatism, turned [quoted text clipped - 12 lines] > > -MT I'm inquiring what kind of abberations are concentrated in the surrounding cornea in widely dilated pupils (surrounding the normal maximum opening which are not used in normal seeing) Kyle Well I think spherical abberation is the main one, but am sure there is a lot of coma, astigmatism, and just plain old light scatter from impure optics going on as well. Not sure how much of that has been quantified, but with wave scans becoming common, someone will anaylyze them. Re the Designer, I agree, there is just too much stuff going on around here to have happened by accident... Especially the beautiful stuff, and the sweet sounding, and, and, well just look around... w.stacy, o.d. >>Because the outermost parts of the cornea have lots of aberrations, >>which are not involved with normal pupil size. The Designer made the [quoted text clipped - 28 lines] >>> >>>Kyle > Re the Designer, I agree, there is just too much stuff going on around > here to have happened by accident... Especially the beautiful stuff, and > the sweet sounding, and, and, well just look around... Kurt Vonnegut said some words about that on the TV the other day: "My training is scientific, but I do feel that evolution is being controlled by some sort of 'divine engineer.' I can't help thinking that, and this engineer knows exactly what he or she is doing, and why, and where evolution is headed. That's why we've got giraffes and hippopotami and the clap." - 9/13/2005 on The Daily Show With Jon Stewart Personally, I would like to add myopia to the list. -- Dicky |
Reply to this Message |
 Sign In
 Join
 My Latest Posts My Monitored Threads My Blog My Photo Gallery My Profile My Homepage Start New Thread Enable EMail Alerts Rate this Thread
|
©2008 Advenet LLC Privacy Policy - Terms of Use
This website includes both content owned or controlled by Advenet as well as content owned or controlled by third parties.