Myopic Maculopathy

Overview

Myopic maculopathy is damage to the macula, the small central area of the retina responsible for sharp, detailed vision, caused by severe nearsightedness (myopia). In people with very high or "pathologic" myopia, the eyeball is longer than normal, which stretches and thins the retina and the tissues behind it. Over time this stretching can damage the macula and reduce central vision.

Unlike ordinary nearsightedness, which is corrected with glasses or contacts, pathologic myopia can cause lasting changes inside the eye. Myopic maculopathy is an important cause of vision loss in people with very high myopia, which is why regular eye exams are important for early detection. The changes tend to develop gradually over years, but some complications, such as bleeding from abnormal blood vessels, can cause a more sudden drop in vision. Because some of these complications are treatable when caught early, people with high myopia benefit from knowing the warning signs and keeping up with monitoring even when their vision seems stable.

Symptoms

Symptoms affect central vision and may develop gradually or, in some cases, suddenly.

• Blurred or reduced central vision
• Distortion, where straight lines look wavy or bent
• A blind or dark spot in the center of vision
• Difficulty reading or recognizing faces
• Reduced ability to see fine detail

Sudden vision loss, a new dark spot, or new distortion needs prompt evaluation by an eye specialist, as it can signal bleeding or a new complication that may be treatable if caught early.

Causes

The root cause is the excessive lengthening of the eye seen in severe myopia, which stretches the back of the eye.

• Stretching and thinning: The lengthened eye thins the retina and the layers beneath it, weakening the macula.
• Lacquer cracks and atrophy: Breaks and thinning in a supportive layer behind the retina can develop.
• Abnormal blood vessels: New, fragile blood vessels (choroidal neovascularization) can grow and leak or bleed under the macula.
• Staphyloma: An outward bulging of the back wall of the eye, such as a posterior staphyloma, adds to the stretching.

Risk Factors

• High or pathologic myopia (severe nearsightedness)
• A long eyeball (high axial length)
• Older age, as changes tend to progress over time
• A family history of high myopia
• Existing myopia-related changes in the retina

Diagnosis

An eye specialist diagnoses myopic maculopathy through a detailed examination of the retina and imaging.

• Dilated eye exam: Drops widen the pupil so the doctor can examine the macula and retina.
• Optical coherence tomography (OCT): A scan that shows detailed cross-sections of the macula and detects thinning, fluid, or abnormal vessels.
• Imaging of blood vessels: Tests such as angiography can reveal leaking or abnormal vessels under the retina.
• Vision testing: Including an Amsler grid to detect distortion or blind spots.

Treatment

Treatment depends on the type of damage. Some changes cannot be reversed, but certain complications can be treated to preserve vision.

• Anti-VEGF injections: Medicines injected into the eye can treat abnormal blood vessels (choroidal neovascularization) that grow and leak under the macula, helping to limit vision loss.
• Monitoring: Regular eye exams to track changes and catch new complications early.
• Treating related problems: Surgery may be considered for certain complications such as a macular hole or retinal detachment.
• Low-vision support: Aids and rehabilitation help people make the most of remaining vision when damage is permanent.

Prevention

Myopic maculopathy cannot always be prevented, but the risk and impact can be reduced:

• Have regular eye exams if you have high myopia, even when vision seems stable
• Report any new blur, distortion, or dark spots promptly
• Encourage outdoor time and healthy eye habits in children, which may help limit myopia progression
• Follow your eye specialist's advice on monitoring intervals

When to See a Doctor

If you have high myopia, see an eye specialist regularly for monitoring. Seek prompt care if you notice:

• Sudden loss or blurring of central vision
• New distortion, where straight lines appear wavy
• A new dark or blank spot in your central vision
• A sudden increase in floaters or flashes of light

Early treatment of complications such as abnormal blood vessels or retinal detachment offers the best chance of preserving vision.

Related Topics

Frequently Asked Questions

References

1. National Eye Institute (NEI). Myopia (Nearsightedness).
2. American Academy of Ophthalmology. Pathologic myopia and myopic maculopathy.
3. MedlinePlus, U.S. National Library of Medicine. Nearsightedness.
4. National Library of Medicine, StatPearls. Pathologic Myopia.