The Naked Scientists

The Naked Scientists Forum

Author Topic: Vitreous Humor Index of Refraction  (Read 4895 times)

Offline lousyeye

  • First timers
  • *
  • Posts: 1
    • View Profile
Vitreous Humor Index of Refraction
« on: 15/10/2007 23:47:17 »
I am a retired engineer and have a question concerning eye optics.  A few years ago I had bleeding internal to my eye which was removed by draining the blood along with the "original equipment" vitreous humor.  To maintain the shape of the eye, the resulting cavity was filled with a gas which over time was absorbed by the body and replaced with "new" fluid manufactired by my body.  It was interesting to watch the refilling process since as the liquid level increased the level appeared upside down in my vision.  If I were to shake my head, the fluid would have "waves" but again upsidedown.  After a week or so all the gas was absorbed and my eye was filled with new fluid.  So far all is good.  Unfortunatly my vision is now permanently "blurred".  My opthamologist is at a loss over this.  My eye is so far out of focus that a corrective lense is so different from my other eye that my brain cannot compensate.  I have sharp vision if the object is about ten inches from my eye.  The depth of field is small so things begin to blur at less that 9 inches and more than 11 inches.  Being an engineer I have thought about the cause.  Due to a cataract I need a new lens.  How do I get the right lens the first time?


 

Offline RD

  • Neilep Level Member
  • ******
  • Posts: 8126
  • Thanked: 53 times
    • View Profile
Vitreous Humor Index of Refraction
« Reply #1 on: 19/10/2007 17:29:02 »
I have sharp vision if the object is about ten inches from my eye.  The depth of field is small so things begin to blur at less that 9 inches and more than 11 inches.

What you have described is presbyopia which can be corrected using bifocal or varifocal glasses.
http://en.wikipedia.org/wiki/Presbyopia
« Last Edit: 27/10/2007 09:41:50 by RD »
 

The Naked Scientists Forum

Vitreous Humor Index of Refraction
« Reply #1 on: 19/10/2007 17:29:02 »

 

SMF 2.0.10 | SMF © 2015, Simple Machines
SMFAds for Free Forums