The Relationship Between Meningioma and Vision Problems

Meningioma is one of the tumors that develops from cells associated with the membranes called the meninges, which surround the brain and spinal cord. Although the majority of these tumors, also known as meningiomas, tend to grow slowly, they can cause significant neurological problems due to the anatomical region in which they are located. In particular, meningiomas located close to the optic nerves, optic canal, optic chiasm, or cranial nerves that control eye movements may lead to various vision-related complaints.

The relationship between meningioma and vision problems cannot be explained solely by the size of the tumor. While a small tumor located immediately adjacent to the visual pathways may cause significant vision loss, a larger meningioma located in a different region of the brain may not cause vision problems for a long time. Therefore, Prof. Dr. Ömür Günaldı states that in the evaluation of meningioma, in addition to the size of the tumor, its relationship with the optic nerves and other critical anatomical structures should be examined in detail.

Can Meningioma Cause Vision Problems?

Yes, some meningiomas can cause vision problems. However, visual impairment does not occur in every patient with meningioma. Vision-related symptoms largely depend on the location of the tumor.

Visual information from the eyes is transmitted to the brain through the optic nerves. The optic nerves travel within the skull and connect with the visual pathways in a region called the optic chiasm. A meningioma developing near these structures may gradually exert pressure on the nerve tissue.

As a result of this pressure, patients may experience problems such as decreased visual acuity, visual field loss, or blurred vision.

What Vision Problems Can Occur in Meningioma?

Vision problems caused by meningioma may vary from patient to patient. The location of the tumor and the nerve structures it affects are among the main factors determining the type of symptoms.

• Decreased vision in one eye
• Blurred vision
• Loss in certain areas of the visual field
• Double vision
• Changes in color perception
• Progressive decrease in visual acuity
• Impaired eye movements
• Drooping eyelid
• Severe vision loss in advanced cases

Not all of these symptoms are specific to meningioma. Eye diseases, vascular diseases, and various neurological disorders may also cause similar problems.

Therefore, newly developed or progressively worsening vision problems should be evaluated by an ophthalmologist and, when necessary, from a neurosurgical or neurological perspective.

How Does Meningioma Affect the Optic Nerve?

The optic nerve is the primary nerve structure that carries visual information generated in the eye to the brain. Medically known as the optic nerve, this structure passes through specific anatomical canals within the skull.

When a meningioma develops near the optic nerve, the growth of the tumor may exert direct pressure on the nerve. Prolonged pressure may impair nerve function and lead to decreased visual acuity.

In some patients, vision loss progresses so slowly that it may not initially be noticed. A patient may only realize that vision in one eye has gradually decreased when covering the other eye.

Prof. Dr. Ömür Günaldı emphasizes that, particularly in meningiomas located close to the optic nerve, neurological and radiological evaluation at an early stage may be important for treatment planning aimed at preserving visual function.

Which Types of Meningioma Can Affect Vision?

Rather than the histological type of the meningioma, its anatomical location may be more decisive in terms of vision problems. In particular, some meningiomas developing at the skull base may be located close to the visual pathways.

Tuberculum Sellae Meningioma

The tuberculum sellae region has a close anatomical relationship with the optic nerves and optic chiasm. Meningiomas developing in this region may exert pressure on the visual pathways as they grow.

One of the first complaints in patients may be progressively decreasing vision in one or both eyes.

Planum Sphenoidale Meningioma

Meningiomas developing in the planum sphenoidale region may also be located close to the optic structures. As the tumor grows, it may affect the optic nerves or visual pathways.

Sphenoid Wing Meningioma

Meningiomas arising from the wing of the sphenoid bone may have a close relationship with the orbit, optic nerves, and certain cranial nerves.

Depending on the size and extent of the tumor, changes in vision or problems related to eye movements may occur.

Optic Nerve Sheath Meningioma

Meningiomas developing from the membranous structures surrounding the optic nerve may directly affect the optic nerve. In this case, progressive vision loss may occur over time.

Prof. Dr. Ömür Günaldı states that in tumors located close to the visual pathways, the relationship between the optic nerve and the tumor should be evaluated in detail when planning surgical or other treatment options.

Can Meningioma Cause Blurred Vision?

Meningioma may cause blurred vision in some patients. Particularly when the tumor exerts pressure on the optic nerve or visual pathways, a decrease in visual acuity may occur.

However, blurred vision is a very common complaint in the general population and may result from many eye diseases. Conditions such as myopia, hyperopia, astigmatism, cataracts, and retinal diseases can all cause blurred vision.

Therefore, the presence of blurred vision alone does not mean that a person has a meningioma.

Can Meningioma Cause Double Vision?

Yes, double vision may occur in some cases of meningioma. One of the main causes of double vision is the involvement of the cranial nerves that control eye movements.

Tumors located particularly at the skull base may have a close relationship with the third, fourth, or sixth cranial nerves that control eye movements.

Compression of one of these nerves may disrupt the coordinated movement of the eyes and cause the patient to see objects double.

Prof. Dr. Ömür Günaldı states that symptoms such as double vision in patients with meningioma may provide important clinical information about the anatomical location of the tumor.

Can Vision Loss Be the First Symptom of Meningioma?

In some patients, yes. Particularly in meningiomas developing close to the optic nerves, decreased vision may be the first noticeable symptom of the disease.

Because meningiomas generally grow slowly, vision loss may also progress gradually. This may make it difficult for the patient to notice the problem at an early stage.

Progressively decreasing vision in one eye is particularly important. Because the patient can see normally with the other eye, vision loss may go unnoticed for some time.

Therefore, in cases of unexplained and progressive vision loss, not only an eye examination but also neurological evaluation and imaging studies may be performed when considered necessary.

How Are Vision Problems Related to Meningioma Diagnosed?

In cases of suspected meningioma, a detailed neurological evaluation and imaging methods are used.

Brain MRI: Magnetic resonance imaging is one of the primary methods used to evaluate the location and size of a meningioma.

Contrast-enhanced MRI examinations allow the relationship of the tumor with the optic nerves, optic chiasm, and other surrounding structures to be evaluated in detail.

Eye Examination: Visual acuity measurement, fundus examination, and evaluation of eye movements may be performed.

Visual Field Test: A visual field test may be performed to determine which areas of the visual field are affected by loss.

Optical Coherence Tomography: This method, known as OCT, allows detailed evaluation of the retina and certain structures associated with the optic nerve.

Prof. Dr. Ömür Günaldı states that in meningioma patients with visual complaints, findings obtained from neurosurgical evaluation and eye examination should be considered together.

Can Meningioma Treatment Improve Vision?

The extent to which visual function may improve after treatment varies from patient to patient. The duration of optic nerve compression, the degree of vision loss, and whether permanent nerve damage has developed may affect the outcome.

In some patients, visual function may improve after the pressure exerted by the tumor on the optic nerve is reduced. In other patients, the primary goal may be to preserve existing vision and prevent further loss.

In patients with long-standing and severe optic nerve damage, complete recovery of visual function may not be possible.

Therefore, early evaluation is particularly important in cases of progressive vision loss.

Is a Meningioma Compressing the Optic Nerve Operated On?

The decision for surgery is made according to the individual patient and the characteristics of the tumor. Surgical treatment may be considered in some meningiomas that cause vision loss, are growing, or exert significant pressure on the optic nerve.

The aim of surgery is to remove the tumor to a safe extent and, whenever possible, reduce pressure on the visual pathways.

However, surgical procedures around the optic nerve require particular precision. The close relationship of the tumor with the nerve or important blood vessels may affect the surgical plan.

Prof. Dr. Ömür Günaldı emphasizes that in meningiomas affecting visual function, surgical planning should be individualized by considering the tumor's relationship with the optic nerve, blood vessels, and other critical structures.

Radiotherapy and Vision in Meningioma

In some meningiomas, radiotherapy or stereotactic radiosurgery methods may be considered as alternatives to surgery.

Radiotherapy may be considered particularly for certain tumors that carry a high risk if completely removed, tumors with residual tissue after surgery, or tumors that regrow.

However, when the tumor is located very close to the optic nerves, this becomes particularly important in radiation treatment planning. The radiation doses to which the optic nerve and optic chiasm may be exposed must be carefully evaluated.

The choice of treatment is determined according to the patient's age, general health condition, tumor size, growth rate, and anatomical location.

Does Vision Loss Improve After Meningioma Surgery?

The possibility of vision improvement after surgery varies from patient to patient. The condition of the optic nerve before surgery is one of the most important factors.

If the nerve has been under severe pressure for a long period, permanent damage may have occurred. In contrast, in some patients treated at an early stage, visual function may improve after the pressure is relieved.

Therefore, it is not appropriate to guarantee before surgery that vision will completely recover.

Prof. Dr. Ömür Günaldı states that the preoperative level of vision, the anatomical characteristics of the tumor, and the condition of the optic nerve are important in evaluating visual outcomes after surgery.

The relationship between meningioma and vision problems depends particularly on the anatomical location of the tumor. Meningiomas developing near the optic nerve, optic chiasm, or cranial nerves that control eye movements may cause blurred vision, visual field loss, double vision, or progressive decrease in vision.

Long-lasting vision loss may increase the risk of permanent nerve damage in some patients; therefore, progressive and unexplained vision problems should be evaluated. Prof. Dr. Ömür Günaldı states that the treatment plan for meningiomas should be developed by considering the tumor's size, location, relationship with the visual pathways, and the patient's current neurological condition together.