Re: double images



On Sep 16, 6:51 am, Narasimham <mathm...@xxxxxxxxxxx> wrote:
A double image is temporarily formed due to lens accomodation
insufficiency in the normal eye e.g., when lower power of glasses is
first used for reading and then an attempt to see a far off object is
made.

Is the second image above the corrected image, below, or are the
images displaced one half up another half down equally? TIA

Narasimham

==============================================
I have never experienced this. In my experience when you use reading
glasses and then look far off, the image simply looks blurry -- I
don't get a double image just a blurry one.

The only thing I can possibly think you mean is if you took at the
very top edge of the lens, so that you are getting light from both the
lens and above the lens. I'm doing this right now as I write. A
small portion of the image seems to be doubled. And this is for only
a narrow band through the entire scene -- most of the scene is not
doubled and the top part is my naked eye and the bottom part is
through the reading glasses. The image through the lens appears at a
higher height than what you see with no lens. Again, this is my
actual observation right now.
Regards,
ImageAnalyst

.



Relevant Pages

  • Re: Glasses for Computer use.
    ... I think you are saying that your reference is that 1.5D reading glasses work ... If you had a perfect eye, in the sense that it sees objects at infinity ... Because you are using a 1.25D lens to get that effect, ... I was suggesting that you do not need glasses to view your screen at 0.61m. ...
    (sci.med.vision)
  • Re: Eye exam
    ... # the lower lens is for reading, the middle lens is set for handgun front ... # sight distance, and the top lens is for distance. ... lessened to the point that I could go back to reading without reading ... glasses and I could use iron sights fairly well. ...
    (rec.guns)
  • Re: Fri. 10/13 Big Show Synopsis
    ... I'm troubled by the effect my recent book reading is having on my eyes. ... with terrible vision and wear my glasses when reading. ... last spring I decided to try the monovision contact lens. ...
    (alt.fan.letterman)
  • Re: Progressives/bifocal/reading glasses questions
    ... pair of progressives and a pair of "distance" glasses. ... them (I either had to constantly move my head or the reading material). ... assuming the lens is positioned properly. ... go with a pair of distance glasses and a pair of reading glasses. ...
    (sci.med.vision)
  • double images
    ... insufficiency in the normal eye e.g., when lower power of glasses is ... first used for reading and then an attempt to see a far off object is ...
    (sci.optics)