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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What is the process where the crystalline lens thickens to allow focusing on near objects?

Accommodation
Convergence
Divergence
Reflection

The correct answer is: Accommodation

The correct answer is Accommodation. Accommodation is the process by which the crystalline lens within the eye thickens or changes shape to focus on near objects. This adjustment helps to bring close objects into clear focus by increasing the refractive power of the lens. Convergence refers to the inward movement of the eyes to maintain single binocular vision when looking at near objects. Divergence is the opposite of convergence, as it involves the outward movement of the eyes for focusing on distant objects. Reflection is the bouncing back of light rays when they encounter a surface.