Visual Field Loss After Brain Tumor Surgery: Eligibility Criteria

Visual field defect

Hello doctor, I underwent surgery for a right brain tumor, which has resulted in homonymous hemianopia in both eyes on the left side.
I have confirmed this condition through examination.
Could you please let me know if I meet the following criteria?
Severe: Visual acuity in the better eye is less than 0.1 (not including 0.1).
The criteria for determining disability are based on corrected visual acuity, and those who cannot recover despite treatment.
Moderate: Visual acuity in the better eye is less than 0.2 (not including 0.2).
For the better eye, the average defect in the 24-degree central visual field test using an automated perimetry is greater than 40 dB (not including 40 dB).
Complete blindness (no light perception) in one eye with visual acuity in the other eye less than 0.2 (not including 0.2).
Mild: Visual acuity in the better eye is between 0.1 and 0.2.
Each eye has a visual field of 20 degrees or less.
For the better eye, the average defect in the 24-degree central visual field test using an automated perimetry is greater than 25 dB (not including 25 dB).
Complete blindness (no light perception) in one eye with visual acuity in the other eye between 0.2 (including) and 0.4 (not including), or each eye has a visual field of 20 degrees or less.

johnny, 20~29 year old female. Ask Date: 2006/06/23

Dr. Ke Meilan reply Ophthalmology

Hello, may I ask what your best corrected vision is? How much vision loss do you have? Knowing these two results will help determine if you meet the criteria, so please visit a major hospital for an examination.
Thank you for your message.
Sincerely, Dr.
Mei-Lan Ke, Ophthalmology Department.

Reply Date: 2006/06/23

More Info

Understanding visual field loss after brain tumor surgery is crucial for assessing eligibility for disability benefits and determining the extent of visual impairment. In your case, you mentioned experiencing left homonymous hemianopia (loss of vision in the left visual field of both eyes) following surgery for a right brain tumor. This condition can significantly impact daily life and may qualify you for disability support based on specific criteria.

Eligibility Criteria for Visual Impairment
1. Severe Visual Impairment: According to the criteria you provided, severe visual impairment is defined as having a better eye's vision below 0.1 (not including) after treatment, with no possibility of recovery. If your visual acuity in the better eye is indeed below this threshold, you may qualify under this category.

2. Moderate Visual Impairment: This category includes individuals with a better eye's vision below 0.1 (not including) and an average visual field defect greater than 40 decibels (DB) in a 24-degree automated visual field test. If your visual field loss is confirmed to be significant, you might also qualify under this moderate impairment category.

3. Mild Visual Impairment: Mild impairment is characterized by better eye vision between 0.1 and 0.2, with visual fields restricted to 20 degrees or less. If your vision falls within this range, you may be eligible for mild impairment classification.

Assessing Your Condition
Given your specific situation, it is essential to undergo a comprehensive eye examination, including visual acuity tests and visual field assessments, to determine the exact degree of your impairment. The following steps can help clarify your eligibility:
- Visual Acuity Testing: This will measure how well you can see with your better eye. If your vision is below the specified thresholds, it will support your claim for severe or moderate impairment.

- Visual Field Testing: Automated perimetry can quantify the extent of your visual field loss. If your average defect exceeds the specified decibel loss, it will further substantiate your eligibility for disability benefits.

- Documentation: Ensure that all test results, medical records, and any relevant documentation from your healthcare providers are compiled. This information will be crucial when applying for disability status.

Recovery and Rehabilitation
While some individuals may experience partial recovery of visual function over time, the prognosis largely depends on the extent of the damage to the visual pathways and the underlying cause of the visual field loss. Rehabilitation options, such as vision therapy or occupational therapy, may help you adapt to your visual changes and improve your quality of life.

Conclusion
In summary, your eligibility for disability benefits due to visual field loss after brain tumor surgery will depend on the results of your visual acuity and visual field tests. It is advisable to consult with your ophthalmologist or a specialist in low vision rehabilitation to get a comprehensive assessment. They can provide guidance on the next steps, including potential rehabilitation options and assistance with the application process for disability benefits. Remember, timely intervention and support can significantly enhance your ability to cope with visual impairments and improve your overall well-being.

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