China Eye Prescription Different?!
Question: China Eye Prescription Different?
Sphere Cylindre Axe A/V
Right -6.00 -1.75 9 6/6
Left -6.00 -2.25 175
Does the Sphere of -6.00 degree is including the myopia + astigmatism ? or solely myopia?
Because I see things a bit blurry from far with my new glasses, and I noticed that the Chinese Opto
wrote -4.00 for both eyes in Myopia/sphere in the prescription. However, the rest is exactly the same as my Canadian Prescription.
And what does A/V mean?
Thanks for the help in advance, my vision is very clear from close.
Answers:
Best Answer - Chosen by Voters
Prescriptions are the same all over the world.
Sphere is myopia only. Cyilindre indicates the diopters of your astigmatism (diopters) , while Axe is the axis of the astigmatism.
-4 sphere is hugely different from the Canadian prescription. Such a difference is absolutely inexplicable.
Sounds like your Canadian doctor wrote the prescription in minus sphere, and your Chinese doctor wrote the prescription in plus sphere. This is basically a way opticians, optometrists, and ophthalmologists interpret the power of the glasses. Opticians and optometrists tend to write in minus sphere while ophthalmologists write in plus sphere.
Your Rx in minus sphere (Left eye -6.00 - 2.25 x 175) in plus sphere is is transposed as (-3.75 +2.25 x 085).
You are nearsighted with astigmatism. The first number (-6.00) determines the myopia. The second number (-2.25) is the astigmatism. The third number is the axis of the astigmatism.
The A/V is probably referring to the vestex distance (i.e. the distance in millimeters from the glass to your eye). This is around 13mm, but most times we do not write this number unless there has been some prior issue with the vertex distance.
Oh, China... went there while I was an optometry student and was thoroughly baffled by some of their ways of doing things. Their methods of measuring binocular vision make more sense than ours, though.
So let me get this right: you gave a written prescription to your parents, who then brought it to China, and then somehow a Chinese optometrist gives you a new prescription without having examined you? That doesn't quite make sense to me. It is fairly common for Chinese doctors to undercorrect myopia, although there's some evidence suggesting that this makes things worse, not better. If you're wearing -4 instead of -6, your close vision should be fine but your long distance probably isn't as clear as it could/should be.
The sphere column is the myopia only; the cylinder and axis are the astigmatism numbers. A/V seems to be visual acuity (which is usually written VA) in metric form.
I'm a (Canadian) optometrist.
Take the right eye....the - 6.00 sphere is strictly the spherical power, then the - 1.75 Cylinder is the astigmatism correction , which is separate from the sphere power, then the axis of 9 degrees which is just the meridian that - 1.75 is placed on in your lens. Then the left works the same way.
So, no...the - 6.00 doesn't include everything.
A/V is Acuite visuel...visual acuity in French....I presume you got your prescription in Quebec. It is 6/6 , or 20/20 for us pre-metric folks.
I can't imagine what the - 4.00 is about , but if you were given - 4.00 instead of -6.00 , they would be a lot worse than a " bit blurry "
Even if the Chinese guy was transposing it to the + CYL form , there is still no - 4.00 involved , so that can't be it.
Why don't you take them to an optical store along with your prescription , and after a brief explanation , ask them to check the power in the glasses. I'm sure they would do that for you.
Optician