repeating rifle

I have recently had a cataract removed and an intraocular lens implanted.
While waiting to be fitted with new glasses, I observe how my vision has
been affected.

For example, a single vertical line becomes multiple vertical lines. A
traffic light becomes multiple traffic lights spread horizontally. As I was
watching a license plate, the letters seemed to move around a bit.

At first, I thought it was just astigmatism. I now think that it is a moire
effect between transparent floaters that act like cylindrical lenses and the
object I am looking at. I can also describe it as spatial frequency beating.

Does my explanation make sense? Is this moire effect common? To what extent
can it be corrected?

I only have myself as a subject to be observed. I am hoping this has been
observed in others so that I can extrapolate from them.

Bill

repeating rifle

in article BC15F5F0.36A3%SalmonEgg@sbcglobal.net, Repeating Rifle at


I have some more explanation. I think that I am zeroing in on the
phenomenon.

The implant was supposed to be adjusted to where I would have 2.0 diopters
positive lensing. As it turned out, I would estimate that the results was +3
or maybe a bit more.

As a consequence, a real image is formed in the vitreous humor a few
millimeters in front of the retina. Any structure there, as would come from
floaters, will mask this real image and lead to moire effects. When the
light reaches the retina, the image and the mask has blurred. The effect
will be greatest when the detail of the image has similar structure as that
of the floaters.

I expect much of the moire effect will go away when properly fitted lenses
are used. There will be no sharp real image formed where there are floaters.

Bill