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Home > In Detail
In Detail
The VIP Study is a prospective, multi-center, multi-year, multi-phased, multi-disciplinary clinical study to establish the accuracy of tests used to screen for significant and prevalent vision disorders among preschool aged children.
Organizational Structure
Research Structure
Common Childhood Vision Disorders Defined
The vision disorders targeted for detection in the VIP Study are amblyopia, strabismus, and significant refractive error.
- Amblyopia (am blee oh pee ah) reduced visual acuity in one or both eyes not improved solely with refractive correction and not attributed to other obvious ocular abnormalities.
- Strabismus (stra biz mas) is an "eye misalignment" or inability to direct the two eyes in the same direction simultaneously.
- Refractive (ree frak tiv) Error occurs when light entering the eye is not precisely focused on the retina, causing blurred vision. There are four categories of refractive error researched by the VIP Study:
- Anisometropia: an unequal spherical or cylindrical refractive error between the two eyes.
- Astigmatism: an unequal amount of refractive error in the principle meridians within an eye.
- Hyperopia: occurs when light enters the eye and the point of focus is behind the retina, which results in blurred vision. (It is also called farsightedness.)
- Myopia: occurs which light enters the eye and the point of focus is in front of the retina which results in blurred vision. (It is also called nearsightedness.)
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In Print: VIP Archives
Select one of the following links to locate these items in the VIP Archives.
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