American Board of Opticianry (ABO) Practice Test

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Prepare for the ABO (American Board of Opticianry) Test with interactive flashcards and hundreds of multiple choice questions. Updated for 2024 to help you excel on exam day

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Which direction might be used for correcting exotropia?

Base in
Base out
Base up
Base down

The correct answer is: Base in

Exotropia is a type of strabismus, or eye misalignment, where one eye turns outward. When correcting exotropia through vision therapy or surgery, the direction used is typically towards the patient's nose, also known as "base in." The other options, base out, base up, and base down, are used for different types of strabismus such as esotropia (eye turns inward), hypertropia (eye turns upward), and hypotropia (eye turns downward). Using these directions for correcting exotropia would not be effective and could potentially worsen the condition. Therefore, Option A of base in is the most appropriate direction for correcting exotropia.