American Board of Opticianry (ABO) Practice Test

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What phenomenon involves unequal image sizes on the two retinas?

a. Aniseikonia
b. Jaeger
c. Less chromatic aberration
d. Segment

The correct answer is: a. Aniseikonia

Aniseikonia refers to the phenomenon where one eye perceives images differently than the other eye due to unequal image sizes on the two retinas. This can occur due to a variety of factors such as differences in eye size, shape or lens power. Option B, Jaeger, refers to a method of measuring visual acuity and is not related to unequal image sizes on the two retinas. Option C, Less chromatic aberration, is also incorrect as chromatic aberration refers to an effect where different colors of light are focused at different distances, resulting in a blurring or color-fringing effect. Option D, Segment, is a term used in optics and imaging but does not pertain to unequal image sizes on the two retinas.