Do you know what’s anisometropia?
It’s when the two eyes have a difference larger than 1.50 or more. A lot of people are lucky enough to not have to know about it.For those that do, they usually have their vision or comfort affected.I would like to share the way for patients and some other doctors that they can help their patients better.
It’s when the two eye’s prescription is over -1.00. Usually people have symptoms of eyestrain or headaches when it’s more than 1.25 or higher with or without glasses. If the two eye differences are over -2.00, they can easily get headaches from the two eyes not balance together, when they wear glasses.
Usually these are difficult ones for an Optometrists too.
When making glasses for them, glasses for nearsighted people makes the image smaller. But if one eye is -1.00, and another eye is -7.00, than the images that reach the brain through the glasses are in two different sizes, and they would fight with each other, causing headache, eyestrains, and eye fatigue.
The best option is contact lenses and vision therapy.
The contact lens would help them minimize the two image sizes.
They would also need vision therapy to train the eye and brain to reuse the two confusing images and align better together to make one useful image.
The other option is glasses that corrects for image size difference. But both lenses would be rather thick, and no aesthetically pleasing.
Sometimes, the Optometrist might want to take the short cut, and make the one eye prescription a little bit off, so the two eyes are closer in prescription, or match the better eye, and have a smaller difference, but one eye would have the lazy eye and see a worse. (There is a right way to do it, and the wrong way to do it.)
I have a case here where one eye is -1.25, and one is -7.00, with high cylinders and 20/30 in the right eye, but 20/60 in the left eye.
He came in with this, seeing 20/30 in right eye, and 20/60 in left eye.-1.25 -3.00 x005 +2.50-7.00 -2.00 x161 +2.50
Here is his new RX, I corrected him to 20/25, 20/50 while reducing the cylinder.-1.25-2.50×005 +2.00 for computer-7.00-2.00×160 +2.00
He’s in his 60s now, she doesn’t want vision therapy. This is his best progressive lenses so far. She doesn’t have headaches, eyestrain and can read very comfortably.
I order him the lenses that corrects the prism effect when he looks off to the lower part of the lens rather than the lens center, in index 1.74. (ask me privately if you want to know which lens.)
He also ordered a second pair for reading. He’s still having trouble for the reading glasses however.
Though the reading glasses is single vision, he still looks down off the center a bit, and is still having prism effect. I may change it to a mini progressive in the design that has the prism correction.
This is the hardest part, when people look off the center to read for anisometropia.
For a myopic lens, the images usually jumps lower than where it looks like the solid line at the B image above. The higher the RX, the more the jump. Since the two eyes are at -1.00, and -7.00, the two eyes would end up one reading on a higher line, and one at a lower line, causing headaches, eye fatigue and jumping lines when reading.
For younger patients, it’s very effective to have them to wear contact lenses and vision therapy. They may invest in a few months to one year of their time, but they can move ahead for 5 years in life, with reduced vision fatigue and improved performance in reading, learning and driving.
What about you? Do you have eye fatigue? What do you think is the cause? Let me know if you want me to share other eye fatigue causes and relief.你知道什么是鸳鸯眼睛 (屈光参差)吗？
两眼如果相差-1.00（100度）或以上，就是鸳鸯眼了。通常对于视光医生来说，这些度数也是最难搞的。在为客人做眼镜时，近视人士戴的光学镜片会使图像变小。但是，如果一只眼睛是-1.00 (100度) ，另一只眼睛是-7.00 (700度)，则通过眼镜到达大脑的图像是不同大小的。两个眼睛会打架，不会合作，合并不到一个图像，反而容易引起头痛，和眼睛疲劳。
他是这样的度数的，右眼看到20/30，左眼看到20/60。-1.25 -3.00 x005 +2.50-7.00 -2.00 x161 +2.50
这是我给他的新度数，我在减小散光的同时帮他调到右眼看到20/25，左眼看到20/50.-1.25-2.50×005 +2.00 用于电脑和手机的距离（55cm）-7.00-2.00×160 +2.00
尽管老花镜是单光的，但他仍然低着头向下看，并且仍然具有棱镜效果。这镜片公司的单光片还没有做到校正棱镜效果（其他公司的也没有）。我在想可以将其改为具有棱镜校正功能的微型渐进镜片（with lower add)，方便他看电脑，看手机和书。
- Orthok for myopia control, OK镜和多种控制近视方法
- Eye Fatigue Treatment, 治疗眼睛疲劳
- Learning Disability Treatment, 治疗读写障碍
- Customized computer vision glasses, 个人定制，防疲劳眼镜 （隐形眼镜）
- Trendy sunglasses, 潮牌太阳眼镜
Dr. Yan Ling Liang
Changing lives one eye at a time!