Myopia and hypermetropia are two common refractive errors of the eye that affect the ability to focus on distant and close objects, respectively.
Myopia, also known as nearsightedness, is a condition in which the eyeball is too long, or the cornea is too steep, causing light to focus in front of the retina instead of on it. This results in blurred vision of distant objects, while near objects may still be clear. Myopia can be corrected with concave lenses or refractive surgery that diverge light before it enters the eye, allowing it to focus correctly on the retina.
Hypermetropia, also known as farsightedness, is a condition in which the eyeball is too short, or the cornea is too flat, causing light to focus behind the retina instead of on it. This results in blurred vision of close objects, while distant objects may still be clear. Hypermetropia can be corrected with convex lenses or refractive surgery that converge light before it enters the eye, allowing it to focus correctly on the retina.
In summary, myopia is a condition in which distant objects appear blurry, while close objects may still be clear, and can be corrected with concave lenses or refractive surgery. Hypermetropia is a condition in which close objects appear blurry, while distant objects may still be clear, and can be corrected with convex lenses or refractive surgery. Both conditions are caused by abnormalities in the shape of the eye or cornea, which affect the way light is focused on the retina.
