What is the average diameter of a normal adult eye?

The average diameter of a normal adult eye is typically around 24 mm, which aligns with the chosen answer. This measurement is significant as it provides a standard reference for various clinical assessments and procedures in ophthalmology.

Understanding the anatomy of the eye, including its diameter, is crucial for evaluating conditions that may affect vision and for surgical planning. Since the eye is slightly longer from front to back than it is wide, knowing this average dimension helps eye care professionals in identifying potential refractive errors and other ocular diseases.

In terms of the other options, the values of 22 mm, 26 mm, and 28 mm represent measurements that could be relevant in specific contexts, but do not reflect the standard average for a healthy adult eye. Variations from the average can be associated with conditions such as myopia or hyperopia, making it essential to have an accurate understanding of the normal range for effective diagnosis and treatment.