Strabismus, commonly known as crossed eyes or squint, is a condition in which a child’s eyes do not align properly, making it difficult to focus both eyes on the same object simultaneously. This misalignment can cause double vision, and over time, it may lead to reduced visual acuity in the eye that is misaligned. Various treatments are available to correct strabismus, including glasses, vision therapy, and surgery.
What Causes Strabismus?
Strabismus can result from several factors. In some cases, it is caused by refractive errors, such as nearsightedness or farsightedness, which force the child to strain their eyes to see clearly. Other times, it may be due to underlying eye diseases or injuries that affect the eye’s ability to focus. Strabismus can also be hereditary, meaning it is passed down through genes. In many instances, the exact cause of strabismus remains unknown.
How Does Strabismus Affect Vision?
When a child has strabismus, their eyes point in different directions, causing the brain to receive two different images. To avoid double vision, the brain may suppress or ignore the image from the misaligned eye. Over time, this can lead to amblyopia, or lazy eye, where the visual acuity in the suppressed eye decreases. Strabismus can also affect depth perception, making it difficult to judge distances accurately.
Types of Strabismus
Strabismus can be constant, meaning the eye is misaligned all the time, or intermittent, where the misalignment occurs only occasionally, often when the child is tired or ill. It can also be classified based on the direction of the misalignment. Esotropia refers to inward turning of the eye, exotropia is outward turning, hypertropia is upward turning, and hypotropia is downward turning.
Symptoms of Strabismus
The most obvious symptom of strabismus is visibly misaligned eyes. Other symptoms may include double vision, squinting or closing one eye to see clearly, tilting the head to compensate for the misalignment, and poor depth perception. In some cases, children with strabismus may not be aware of their condition, especially if it has been present since early childhood.
When to Seek Medical Attention
It is important to contact a healthcare provider if you notice any signs of strabismus in your child, especially if they are older than three months and have constant misalignment or older than six months and have intermittent misalignment. If a child suddenly develops strabismus without any prior history, it is important to seek immediate medical attention, as it could be a sign of an underlying medical condition.
Diagnosis of Strabismus
A comprehensive eye examination is necessary to diagnose strabismus and determine the underlying cause. The examination is typically performed by an ophthalmologist or orthoptist, a specialized eye care professional trained in diagnosing and treating eye alignment disorders. The examination may include assessing visual acuity, examining eye movements and alignment, and evaluating the ability of the eyes to work together.
Treatment Options for Strabismus
The goal of strabismus treatment is to align the eyes properly and improve vision. Treatment options may include:
- Eyeglasses: If strabismus is caused by refractive errors, eyeglasses can help correct the vision and align the eyes.
- Vision Therapy: Eye exercises and other vision therapy techniques can help improve eye coordination and strengthen eye muscles.
- Patching: Covering the stronger eye with a patch can force the child to use the weaker eye, improving its visual acuity.
- Eye Muscle Surgery: In some cases, surgery may be necessary to adjust the eye muscles and align the eyes properly.
Takeaway
Strabismus is a common eye condition in children that can affect vision and depth perception. Early diagnosis and treatment are essential to prevent long-term vision problems. If you suspect your child has strabismus, it is important to seek medical attention promptly. With appropriate treatment, many children with strabismus can achieve good vision and proper eye alignment.