American Board of Ophthalmology (ABO) Practice Exam

Myopia specifically refers to nearsightedness, a common refractive error where distant objects appear blurry while close objects can be seen clearly. This condition occurs due to the eye being too long relative to the focusing power of the cornea and lens, or when the cornea is curved too steeply. In the case of myopia, light entering the eye doesn't focus on the retina properly, instead focusing in front of it, which results in difficulty seeing objects at a distance.

Understanding myopia is crucial for ophthalmologists since it affects a significant portion of the population and is one of the main conditions treated with corrective lenses or refractive surgery. While the other options address various aspects related to vision, they do not precisely capture the definition of myopia itself. Blurred vision for near objects, distance vision impairment, and conditions caused by astigmatism do not accurately describe nearsightedness, making "nearsightedness" the most appropriate definition.