http://www.xrite.com/custom_page.aspx?PageID=77
Look, a color test.
I got a perfect score (= 0), twice, even with cataracts.
I think maybe my cataract isn't normal, as it isn't just went grey

It has been several years since my second cataract surgery. It was in my
right eye. Ir was watering heavily then, It has only become waterier
since. I have complained a number of times. At first, I was told that it
was dry eye. I do not think so, It is so watery that tears stream ...

[...]
    My Methods with School Children
    By a Public School Nurse
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[...]
Stories from the Clinic
16: Methods That Have Succeeded
By Emily C. Lierman

My last prescription was written 2½ years ago by my ophthalmologist
who had done a cataract surgery on my right eye.  He added the "add"
part of my glasses (+2.75, +1.75 for my computer glasses which I use
most of the time indoors) by a standard formula, not by testing my

Argh!
I've been reading about "contrast sensitivity", "visual acuity", and
wonder what the difference is.  When I try to find this out, I am
immersed in "cycles per degree".  When I try to find out what that is,