Dr. Hagan answered this question on your other post.
JCH MD
Hi,
Sorry for disturbing. You had helped me a lot about a year back so asking you again.
Previous prescription sph +1.50 cyl +2.00 axis 90 for both eyes and new sph +2.00 cyl -2.00 axis 180 for both?
My 5 year child is wearing the previous prescription from last year and today it changed to new one. What does this change indicates? Looking through the glass the new prescription is less powerful but reading the value it seems opposite. Can I get little more details about it, please?
For an excellent discussion of optics and how lens prescriptions are coded, and a wealth of other information about eye anatomy and eye conditions, I highly recommend you visit ophthalbook.com, by Dr. Timothy Root. It is designed primarily for eye care professionals, but it is written in very easy to understand language
I have written on this is the past: plus and minus cylinders and spherical equivalent plus the section on refractive errors and glasses notations on wikipedia is very good.
Use search feature and archives.
There is no myopia at all.
JCH MD
Just curious...is a +2.0 sphere (mentioned on original post)=slightly nearsighted? Or slightly farsighted?
I thought a -2.0 would be slightly nearsighted, now I am confused.
The prescriptions are almost the same one is "plus cylinder" notation and the other "minus cylinder' notation. It's like giving your weight in pounds or kilograms. The numbers look different but the weight is the same.
JCH MD
Hi,
You had helped me a lot at past. If you could help me again, I would be very thankful to you.
My daughter was wearing the following prescription from last 1 year
Right:
Sph: +3.00 Cyl: -2.50 Axis: 180
Vision 6/9
Left:
Sph: +2.50 Cyl: -2.50 Axis: 180
Vision 6/6
And now she is prescribed with following changes:
Right:
Sph. +1.50 Cyl: +2.00 Axis: 90
Vision 6/9
Left:
Sph: +1.50 Cul +2.00 Axis 90
Vision 6/9
Does this change indicate the improvement on her vision? What does this change indicate? Is it higher power than before?
Please reply me.
Thanking you
Sagun
At 3 the vision may not develop to its fullest potential without the glasses.
JCH MD
Could you please tell me how bad is my daughter's eyes are and are they getting better when she grows up?
You need to discuss your concerns with whomever did the exam and wrote the RX. That is a glasses RX for an eye with astigmatism, that is the corneal is aspherical.
Use google images and type in astigmatism.
JCH MD
There's no way to tell for sure how your daughter's eyes will develop in the future, Astigmatism usually means that the cornea is shaped a little like a football rather than being perfectly spherical. In her case, as is the case with most children, her astigmatism appears to be "with the rule", meaning the steeper curve of the cornea is toward the vertical. Sometimes this changes as children grow, so there is a possibility that her astigmatism will improve slightly with time. However, it is likely she will always require glasses.