About Central Visual Impairment

Overview

Central visual impairment is a type of low vision that makes it hard to do everyday activities. People with central vision impairment are not able to see things in the center of their vision. This makes it difficult to read, drive, or see a computer screen clearly. The vision impairment is not correctable with glasses or contact lenses. Different conditions, including age-related macular degeneration, may cause central vision impairment.

Causes and Risk Factors

Central visual impairment can have various causes and risk factors that can either be modifiable or non-modifiable:

Causes of central visual impairment:

Age-related macular degeneration (AMD) is a prevalent cause, especially in older individuals. AMD affects the macula, leading to central vision loss.
Retinal diseases, such as diabetic retinopathy or macular edema, can also contribute to central visual impairment by affecting the retina's central area responsible for sharp vision.
Injuries or trauma to the eye or head can result in central visual impairment by damaging the structures involved in central vision processing.
Genetic factors may play a role in certain conditions like Stargardt disease, which can lead to central vision loss due to inherited retinal degeneration.

Non-modifiable risk factors of central visual impairment cannot be changed or controlled. This includes:

Increasing age is a significant non-modifiable risk factor for central visual impairment, particularly in conditions like AMD, cataracts, and glaucoma.

Modifiable risk factors of central visual impairment can be influenced or changed. These include:

Smoking is a modifiable risk factor associated with an increased risk of AMD and other retinal diseases that can lead to central visual impairment.
Nutrition plays a role in eye health, and deficiencies in certain vitamins and minerals may increase the risk of conditions affecting central vision.
Physical activity levels can impact eye health indirectly through their effects on overall health and circulation, potentially influencing the development of central visual impairment.

These factors highlight the importance of lifestyle choices and regular eye examinations in managing and reducing the risk of central visual impairment.

Symptoms

Early symptoms of central visual impairment may include difficulty with reading, driving, and performing detailed tasks like threading a needle.

In later stages or with higher severity, individuals may experience issues with color vision and photosensitivity. They may have difficulty seeing different colors and be sensitive to bright light.

Diagnosis

To diagnose central visual impairment, the healthcare professional, usually an ophthalmologist or optometrist, may perform examinations, tests or procedures, including:

Checking your vision by asking you to read letters for different distances and checking your vision when looking straight ahead versus using your peripheral (side) vision.
Dilated eye exam: The healthcare professional may put some drops in your eye to cause the pupil of the eye to open. The doctor can now check the back of the eye for possible reasons for developing central visual impairment.

Treatment Options

Central visual impairment is a symptom of other conditions. The goal of treatment is to treat the condition causing central visual impairment, such age-related macular degeneration (AMD) or glaucoma.

There is no treatment specifically for central visual impairment. There are some actions that may help period with central visual impairment with daily activities, such as:

Using brighter lights
Wearing anti-glare sunglasses
Using a magnifying glass for reading
Rearranging the home to reduce the chances of falling

Progression or Complications

Central visual impairment can continue to progress and often is not correctable. Rehabilitation programs and low-vision aids can help individuals make the most of their remaining vision and maintain independence in daily activities. Regular monitoring and early intervention play crucial roles in managing central visual Impairment effectively.