Can positive power be given for far sight correction?

[zeeshan_khan]

My far vision is blurred by a very minor extent, like I can see large objects clearly but small text at a distance like the one on vehicle plates, hoardings etc. appears blurred at the edges. My doctor prescribed me a +0.25 cylindrical (180 degrees) in both eyes. My concern is that as far as I know a positive power is for near vision correction like reading distance. But my issue is in focussing on far objects, especially moving ones. Is this a correct prescription to give a positive number for correcting far sight?
P.S. I have been inspected on tonometer and the split lamp machine after dilation. Power was tested the following day. I also have problem in going out without sunglasses on a bright sunny day as I can barely open my eyes in bright light.

[JohnHaganMD]

=

[zeeshan_khan]

@SoftwareDeveloper:
I think your statement makes sense. I spend a lot of time in front of computer so there is certainly a dry eye problem. I had already mentioned in my original post that it is a very minor focussing problem which I face when I get away from desk and definitely I can live without it as well. But the doctor prescribed getting anti reflective and anti-UV lenses at this stage more as a precaution and use them regularly with following prescription:


Left

Sphere: Nil
Cylindrical: +0.25
Axis: -180 degrees
Additional power: nil

Right

Sphere: Nil
Cylindrical: +0.25
Axis: -180 degrees
Additional power: nil

[JohnHaganMD]

=

[SoftwareDeveloper]

It is also possible that the blur at distance is caused by other factors than refractive error. For instance dry eyes can sometimes have some slight impact on visual acuity at times.

I'm actually wondering if you left off part of the prescription. Is there a spherical component to the prescription as well as the cylinder correction that you didn't mention since you were simply puzzled by the "+" in the cylinder  correction?

If that is the whole prescription then it  is puzzling since yes, usually having trouble seeing distant objects usually indicates myopia, nearsightedness, which is a "-" negative number in the prescription.  Astigmatism admittedly can cause blur at any distance to some extent, since it indicates your eye isn't spherical so there is some distortion,  however such a small amount should as the doctor notes not make much of a difference. I suppose in theory perhaps the minuscule difference may matter to you. Everyone is different, if you have some need for even a minor improvement that is up to you. Few if any people   bother getting correction for that small an amount if that were the only issue, due to the added inconvenience and cost of getting glasses/contacts. If you *do* have a spherical component to the prescription as well that is larger, then there is however no harm in correcting the minor astigmatism at the same time if you are getting glasses (its likely too minor to bother with toric contacts if you were using contacts).

[JohnHaganMD]

Since I do not understand the question you are asking I will not attempt an answer. That lens you have has no optical power and will not converge or focus the light entering your eye to any meaningful extent any more than looking through a window

JCH MD

[zeeshan_khan]

Hi,

Thanks for your response. I would definitely like to go for a different ophthalmologist. But my main concern is not the amount of power but the prescription of a positive power. Is that really possible in any case for improving distant vision that is blurred by a very minor extent?

The lenses that I was tested with gave me a somewhat better focus and I re-confirmed with the ophthalmologist if I need a positive power and he said yes.

[JohnHaganMD]

If your glasses RX is 0.0 +0.25 axis 180 that is 99.9%  window glass and has virtually no power at all.  I think you need a second opinion from a different ophthalmologists as that glasses RX is too weak to be helpful at all

JCH MD