Option 1 is not correct. Myopia, also known as nearsightedness, is a defect in human vision where the image of a nearby object is focused in front of the retina. This means that the light entering the eye forms an image that falls short of reaching the retina, resulting in blurred vision for objects that are far away.

Option 2 is also not correct. Myopia is specifically related to the focus of nearby objects, not distant objects. People with myopia have difficulty seeing objects that are far away, but their vision is usually clear for objects that are close.

Option 4 is not correct either. Myopia does not affect the focus of distant objects beyond the retina. Instead, the focus of distant objects falls short of reaching the retina in people with myopia.

The correct option is option 3. In myopia, the focus of distant objects is before the retina. This means that the light entering the eye forms an image that falls in front of the retina, causing distant objects to appear blurry.