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Medical Forum / General / Vision / August 2006

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to see floaters more clearly

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Rob - 25 Aug 2006 14:39 GMT
I have been seeing vitreous floaters since age 10. They have gradually
increased - I am 40 now - to a point where they are becoming hard to
ignore. I don't wear glasses and although I haven't actually had an eye
test since school I don't have any trouble reading or suffer from
blurred vision.

The other day I brought a cheap microscope with the intention of seeing
brownian motion, however when I turned the microscope light on and
looked through the eye-piece I saw the clearest view of my floaters
ever. I assume they are so clear because the microscope puts a lot of
light near to the surface of your eye. Up to this point I had been
aware that they are more noticeable in bright surroundings and on a
light background. But viewing them "through" the microscope they are
incredibly clear - for me anyway. It was only the fact that they are
moving reminds me that they are not actually on the microscope slide
itself.

They look similar to the cells one sees through a microscope in Biology
at school. Seeing them requires a certain knack because, unless a
floater happens to be right in the centre of your field of vision, as
you look towards it it will move off in the direction that your eye
moves.

Has anyone else had a similar experience?

Anyroad, it's all a painted veil!
Mike Tyner - 25 Aug 2006 15:01 GMT
> I assume they are so clear because the microscope puts a lot of
> light near to the surface of your eye.

Technically it's because the microscope's exit pupil behaves like a
point-source.

> Has anyone else had a similar experience?

Most people can see floaters in a microscope.

-MT
Salmon Egg - 25 Aug 2006 21:58 GMT
On 8/25/06 6:39 AM, in article
1156513140.219741.253900@75g2000cwc.googlegroups.com, "Rob"
<bobbymcgeorge@hotmail.com> wrote:

> I have been seeing vitreous floaters since age 10. They have gradually
> increased - I am 40 now - to a point where they are becoming hard to
[quoted text clipped - 22 lines]
>
> Anyroad, it's all a painted veil!

My guess is that you are seeing BETTER shadows. Even with modest microscope
magnification, the solid angle of light through the eyepiece is greatly
reduced with respect to what direct viewing would give. This prevents
shadows from being filled in by light from multiple directions.

Bill
-- Ferme le Bush
 
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