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Re: Angle of astigmatism - does it make a difference?

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Re: Angle of astigmatism - does it make a difference?

Charles26 Dec 2006 15:10
> I read that dependent on the angle of the astigmatism the same amount
> can be worse in two people.  Which is the worst angle?  I've had
> -0.50 at either 140 or 150 for the last 5 years and this eye is more
> difficult to correct than the other, could that be the reason?

Not a doctor, but I think maybe what is being said is that 0/180
astigmatism seems to be subjectively more tolerable to people compared
to 90 degree astigmatism.  Up/down blur is probably easier to read
through compared to left/right blur. I think it's also true that a
person can "squint through" 0/180 astigmatism to some extent and you
can't with 90.

140 is getting pretty close to half-way between those cases.

--

Katy26 Dec 2006 09:16
I read that dependent on the angle of the astigmatism the same amount can be
worse in two people.  Which is the worst angle?  I've had -0.50 at either 140
or 150 for the last 5 years and this eye is more difficult to correct than
the other, could that be the reason?

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