Amblyopia

Amblyopia, often referred to as “lazy eye,” is a condition in which one eye does not develop proper vision during childhood, even though the eye appears normal and healthy. The brain favors the stronger eye, and over time, the weaker eye becomes less effective. Early diagnosis and treatment are key to improving vision and preventing long-term visual impairment.

What to look for

Amblyopia can be difficult to detect because it typically affects only one eye, and the stronger eye compensates for the weaker one. Common signs and symptoms to watch for include:

Poor vision in one eye: The child may have difficulty seeing clearly with one eye.

Squinting or closing one eye: Children with amblyopia may squint or cover one eye to improve vision.

Crossed or misaligned eyes: This is often seen in children with strabismus.

Poor depth perception: Misjudgment may impact activities like catching a ball or driving.

Complaints of blurry vision: Children may complain of blurry or unclear vision in one eye.

What is Amblyopia?

Amblyopia occurs when the brain and one eye do not work together properly, causing the vision in one eye to be significantly poorer than in the other. This condition typically develops in childhood and can affect both eyes, though usually only one eye is weaker. Amblyopia can lead to permanent vision loss if left untreated.

How does it affect vision?

In amblyopia, the brain relies on the stronger eye for visual information, while the weaker eye is ignored. Over time, this causes the vision in the weaker eye to remain poor, even if the eye itself is physically healthy. The brain does not process the images coming from the amblyopic eye properly, leading to decreased depth perception and poorer overall vision.

There are several reasons why amblyopia can develop in childhood, including:

  • Strabismus (Misaligned Eyes): This is the most common cause of amblyopia. If one eye turns inward, outward, up, or down, the brain may ignore the input from the misaligned eye to avoid double vision.
 
  • Refractive Errors (Unequal Prescription): If one eye has a much stronger or weaker prescription than the other, the brain may rely more on the eye with the clearer vision. This can lead to amblyopia, even if there is no eye misalignment.
 
  • Deprivation (Obstruction of Vision): Any condition that blocks or reduces vision in one eye, such as a cataract, droopy eyelid (ptosis), or eyelid injury, can result in amblyopia. If vision is obstructed early in life, the affected eye may not develop proper vision.
  • Family history of amblyopia or strabismus increases the likelihood of developing the condition.
 
  • Premature birth can increase the risk of amblyopia.
 
  • Developmental issues that affect one or both eyes, such as eye injuries or certain genetic conditions, may contribute to amblyopia

Amblyopia is diagnosed during a comprehensive eye exam by an optometrist or ophthalmologist. The eye care professional will:

 
  • Assess visual acuity: They will measure how well each eye sees at various distances.
 
  • Check for eye alignment: The eye doctor will check if the eyes are aligned or if one eye is misaligned (strabismus).
 
  • Test for refractive errors: They will check for differences in vision strength between the eyes.
 

Early detection is critical for successful treatment, as amblyopia is much easier to treat during childhood when the brain is still developing its visual pathways.

Traditional treatment often relies on patching of the dominant eye. However, recent advancements in binocular vision therapy present a new approach—offering you a more effective, solution to improving visual function.  In a binocular vision approach, the goal is to engage both eyes simultaneously. By addressing the underlying visual deficits and training the brain to process the input from both eyes, you can experience improved depth perception, visual clarity, and overall binocular function.

 
  • Specialty Lenses: Binocular vision glasses are designed to enhance the visual input from both eyes, encouraging cooperation between them by correcting refractive errors. They can also be tailored to stimulate binocular fusion and improve the coordination between the two eyes, helping to retrain the brain. 
 
  • Vision Therapy:  Lenses alone may not be sufficient for treating amblyopia. Vision therapy plays a vital role in strengthening the neural connections required for proper binocular function. By combining lenses with a structured vision therapy program, we can promote neuroplasticity—the brain’s ability to adapt and reorganize itself—leading to lasting improvements in visual function. Vision therapy exercises are specifically designed to target areas such as eye teaming, convergence, and accommodation. This therapy helps the brain and eyes to work together more efficiently, leading to enhanced visual coordination. 
 
  • Monocular Fixation in Binocular Field (MFBF) therapy:  A cutting edge therapy gaining recognition as an effective method to promote binocular vision–MFBF therapy helps train the brain to use both eyes together by presenting visual stimuli in a way that challenges the brain to focus on objects in the binocular field, while still maintaining monocular fixation. MFBF therapy works by gradually increasing the complexity of visual tasks, starting with easier exercises and progressing to more challenging tasks as the your visual skills improve. Over time, MFBF therapy strengthens the neural pathways necessary for effective eye teaming and binocular vision, resulting in better visual outcomes.

Does your child have amblyopia?

The earlier amblyopia is diagnosed and treated, the more successful the treatment will be. If left untreated, amblyopia can lead to permanent vision loss in the affected eye, even if the other eye is functioning well. Treatment prevent long-term complications, so early intervention is critical.

Related Information

Vision Therapy

Therapeutic Lenses

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