Can Surgery Correct 650-Degree Eye Disparity and 550-Degree Hyperopia?

Q: Can Surgery Correct 650-Degree Eye Disparity and 550-Degree Hyperopia?

Hello, Sir： When the refractive status of the two eyes is different, it is referred to as anisometropia. <br>Clinically significant anisometropia is defined as a difference in refractive power greater than 2.00 diopters between the two eyes. <br>Anisometropia can cause a disparit

With a binocular disparity of 650 degrees and hyperopia of 550 degrees, is surgery an option?

Hello, I am 43 years old.
I have myopia of -1.00 diopters in my left eye and hyperopia of +5.00 (or +5.50) diopters in my right eye, along with amblyopia.
Due to the deterioration of vision in my right eye, I underwent visual field testing, fundus fluorescein angiography, ultrasound, electroretinography, and blood tests at the Veterans General Hospital from last year to early this year.
The most concerning issue is that the electroretinography shows a delayed response in the vision curve of my right eye compared to my left eye.
My next electroretinography appointment is at the end of May.
It seems that my right eye's vision has worsened, possibly due to presbyopia.
I have the following questions:
1.
Given the significant difference in refractive error, is it possible to correct it with glasses?
2.
Is it better to use glasses or contact lenses?
3.
Should I get glasses specifically for my right eye to correct the amblyopia?
4.
If surgery is an option to reduce the refractive error difference, can the hyperopia in my right eye be surgically corrected to lower the degree?
I have searched online Q&A and other resources but found no detailed information.
Thank you for your response! Once again, thank you! Mr.
Chuang, March 8, 1996.

Zhuang Xiansheng, 40~49 year old female. Ask Date: 2007/03/08

Dr. Liu Jingxian reply Ophthalmology

Hello, Sir: When the refractive status of the two eyes is different, it is referred to as anisometropia.
Clinically significant anisometropia is defined as a difference in refractive power greater than 2.00 diopters between the two eyes.
Anisometropia can cause a disparity in the size of the images on the retina of each eye, leading to difficulties in simultaneous binocular vision.
To achieve image fusion, this condition can result in accommodative eye strain, with symptoms becoming more pronounced as the difference increases.
Typically, for eyes with refractive errors (hyperopia, myopia, astigmatism), it is recommended to wear standard "spectacles" to ensure clear vision in both eyes.
However, in cases of anisometropia (for example, with a right eye that is highly hyperopic and a left eye that is myopic, with a difference of 6.00 diopters), it is advisable to wear "contact lenses" to reduce the disparity issues (accommodative eye strain).
If patients have other allergies or issues that make contact lenses unsuitable, "laser surgery" can be considered for correction.
"Laser refractive surgery" can effectively treat myopia, hyperopia, and astigmatism.
In summary, it is essential to pay attention to eye care, avoid excessive eye strain, and not overexert oneself, as this is the way to protect your eyesight.
If you have any related questions, feel free to visit the ophthalmology department at the City United Hospital.
Wishing you good health.
Taiwan e-Learning Academy, Ophthalmology, Taipei City United Hospital, Ren'ai & Zhongxing Branches, Dr.
Liu Jing-Hsiang, Ophthalmologist, March 10, 2007.

Reply Date: 2007/03/08

More Info

When considering the surgical correction of significant refractive disparities, such as a 650-degree difference between myopia and hyperopia, it is essential to evaluate several factors, including the patient's overall eye health, the degree of visual impairment, and the potential benefits and risks associated with surgery.

1. Can Glasses Correct Such a Large Disparity?
In cases of significant refractive differences, such as the one you described, glasses can be used to correct vision, but they may not be the most effective solution. The disparity between your left eye (myopia of -100 degrees) and your right eye (hyperopia of +550 degrees) creates a condition known as anisometropia. This condition can lead to visual discomfort, difficulty in focusing, and even headaches due to the brain's struggle to merge the images from both eyes. While glasses can help, they may not fully alleviate the symptoms associated with such a large difference.

2. Are Glasses or Contact Lenses Better?
Generally, contact lenses are recommended for individuals with significant anisometropia. They sit directly on the eye, reducing the disparity in image size and minimizing the visual discomfort that can occur with glasses. Glasses can create a magnification effect, which may exacerbate the issues of disparity. However, if you have any contraindications for contact lens wear, such as dry eye syndrome or allergies, glasses may still be a viable option, albeit with some limitations.

3. Should You Get Glasses Specifically for the Right Eye?
Given the presence of amblyopia (lazy eye) in your right eye, it is crucial to address this condition separately. A tailored prescription that focuses on improving the vision in your weaker eye may be necessary. This could involve using specialized lenses or treatments aimed at strengthening the visual acuity of the right eye. Consultation with an eye care professional specializing in amblyopia treatment is recommended.

4. Can Surgery Reduce the Degree of Hyperopia in the Right Eye?
Surgical options, such as LASIK or PRK, can potentially correct hyperopia. However, the feasibility of surgery depends on various factors, including the thickness of the cornea, the overall health of the eye, and the specific characteristics of your hyperopia. In cases of significant anisometropia, surgery may help reduce the disparity, but it may not completely eliminate it. Additionally, the presence of amblyopia complicates the situation, as surgery alone may not improve the visual function of the affected eye.

In conclusion, while surgery may be an option to reduce the disparity between your eyes, it is crucial to have a thorough evaluation by an ophthalmologist who can assess your specific situation. They can provide personalized recommendations based on your eye health, the degree of anisometropia, and your overall visual goals. It is also essential to consider non-surgical options, such as vision therapy or specialized lenses, to address the amblyopia and improve your visual comfort. Regular follow-ups and monitoring of your eye health will be vital in managing your condition effectively.

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