What Is Lazy Eye?
5. Diagnosis
Diagnosis can be achieved via the identification of decreased vison in one or both eyes only after other conditions are ruled out. Based on the Snellen chart, lazy eye can be defined as having a difference of having two lines or more in acuity. Since measurement of vision is difficult in young children, it can be estimated based on their reactions by covering one eye and observing their ability to follow an object.
Imaging using a computed tomography (CT) scan, magnetic resonance imaging (MRI) scan, and fluorescein angiography can also be useful to rule out other causes. Diagnosis and treatment should be done as early as possible so the vision loss is minimal. Screening for this condition should be performed for all children between the ages of 3 and 5.
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