Which type of condition is characterized by difficulty seeing objects at a distance?

The condition characterized by difficulty seeing objects at a distance is known as myopia, commonly referred to as nearsightedness. Individuals with myopia can see nearby objects clearly while distant objects appear blurry. This condition occurs when the eyeball is either too long or the cornea has too much curvature, causing light rays to focus in front of the retina instead of directly on it.

Understanding myopia is essential for recognizing how vision correction works, which often involves concave lenses that help to diverge light rays so that they focus properly on the retina, allowing for clearer vision at a distance.

The other conditions mentioned, such as hyperopia, presbyopia, and astigmatism, involve different visual impairments. Hyperopia, for instance, is associated with difficulty seeing close objects clearly. Presbyopia relates to age-related difficulty in focusing on nearby objects, and astigmatism is caused by an irregular shape of the cornea that affects overall vision but may not strictly relate to distance vision problems.