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Refractive Errors in Children

If light rays are not focused on the retina, a refractive error is present. The refractive errors are: myopia , hyperopia and astigmatism [See figures below]


The examiner keeps changing the lenses until reaching a lens power that indicates the refractive error of the patient

Astigmatism (Defined)

A refractive error caused by an abnormality in the curvature of the cornea and/or the lens

Myopia (Defined)

Refractive error in which the uncorrected vision is better at near than it is at distance

Web Page
Allied Health

Watch Now Tutorial Samples Purchase Tutorials Purchase your copy of the Vision Screening Tutorial, available in English and Spanish: Order Online Included on the tutorial: Rationale for effective school vision screening Information regarding refractive errors, amblyopia and strabismus Elements of a successful screening program Pearls and pitfalls of traditional vision screening Examples of preferred and non-preferred charts Demonstration of the proper use of objective vision screening devices (ie photo-refractors) Presentation of other elements of vision screening including color, stereo-acuity and near vision Effective screening of special needs children is illustrated


The devices produce images that can help identify refractive errors (like a prescription for glasses), a large difference between the refractive error of each eye (anisometropia), and ocular misalignments ( strabismus )

Library Entry
Refraction as Part of the Eye Exam

Described for the ophthalmologist along with correct CPT coding. Approved by AAPOS Board of Directors - May 2012 Reaffirmed by the AAPOS Board of Directors - March 2017


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