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About Amblyopia or Lazy Eye

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About Amblyopia or lazy eye

We have already covered most of the common ocular disorders in isolation and with regard to the specific eye structures affected. Nonetheless, we feel we should explain a bit more about amblyopia now. In this blog post, we will talk about amblyopia or lazy eye.

The Exact Mechanism of Amblyopia Development Remains Obscure

In short, as you probably know so far, it is a disorder that ensues as the result of inappropriate vision development during early years of one’s life. As such, and by definition, it is characterized as decreased visual function without any noticeable pathologies.

As simple and alluring as this definition might sound, is it really true? Well, to a certain extent, it is. People generally like to think that we comprehensively understand everything—the big bang, the theory of relativity, the world’s economy, the action of certain medications, and so on and so forth.

The truth, however, is that we do not. The best we can do is assume to a certain degree of confidence how particular things might be. Which, in reality, is totally fine and until someone comes up with a better explanation, perfectly adequate. Something similar applies to amblyopia as well.

While it may be true that with all the available examination tools we have, we do not find anything that could explain decreased vision in amblyopia, it does not mean that there is nothing wrong. Much out there is still beyond our current understanding, and exact pathophysiology of amblyopia is no exception. While we do know that there is something wrong with the brain in amblyopia, we do not know exactly what it is. For that reason, as of today, we are still unable to address amblyopia more directly, or more effectively, if you wish.

How Does Amblyopia Occur?

Back to amblyopia now, why does it come to be then? In a nutshell, there is an imbalanced input from the two eyes in one’s early life. In other words, the image that one retina gets is much clearer than the image that the other retina gets. As a consequence, the brain prefers the higher quality image from one retina (one eye). Therefore, the input from the worse eye is attenuated in the brain, which is why that eye becomes amblyopic.

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Amblyopia Causes

The conditions that can lead to the development of amblyopia are:
(a) deprivation, most commonly congenital cataract;
(b) strabismus or squint and
(c) unequal refractive power of the two eyes, which is called anisometropia.

The Treatment is Still Effective

As long as amblyopia is treated early in its course, it is indeed one of the easiest and most effectively treated conditions we can treat.

There is, however, plenty of research which proves that amblyopia might actually be treated even better and, more importantly, at much older ages. For now, all that remains experimental in animal models, but there is certainly hope that we will get some of it into clinical practice in the next few decades.

Amblyopia Treatment Process

Amblyopia treatment is usually divided into

(a) treatment of the cause and
(b) treatment of the amblyopia itself.

Treatment of the cause depends on the cause. It can either be cataract extraction for congenital cataract, correctly prescribed refractive correction for anisometropia, or surgery/prisms for strabismus. Treatment of amblyopia itself on the other hand involves patching or various vision therapies such as our AmblyoPlay.

In the next blog we will go into further neurophysiological details and will cover the potential mechanisms of how amblyopia could be treated pharmacologically. Stay tuned!

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