They need a concave lens
You must use convex lenses because in farsighted person the image is formed at the back of retina so it must be move forward to make it exactly in the retina so convex converges so it will be forwarded.
A person who is farsighted needs a converging lens, which is a convex lens, to help focus light properly onto the retina. This type of lens helps to converge incoming light rays so that distant objects can be seen more clearly.
A person with myopia (nearsightedness) needs concave lenses to correct their vision. Concave lenses diverge light before it enters the eye, helping to focus the image correctly on the retina and improve vision for nearsighted individuals.
Convex lenses are thicker in the middle then the edges and concave are thicker at the edges then the middle. When light travels through lenses, refraction occurs. The light bends either outward or inward, it depends on the lens.The lens of your eye is a double convex lens. Its job is to focus the image on the retina of the eye. If one is farsighted, the lens in the eye causes the focus to be behind the retina. These people see far but have some difficultly seeing close-up.To correct this farsightedness, the person would wear glasses or contacts with convex lenses, for It is often used for close examination of small objects.
A far-sighted person should use convex lenses. These lenses help to converge the incoming light rays so that they focus correctly on the retina, correcting the vision for far-sightedness.
Hyperopic, plus powered, or convex lenses.
You must use convex lenses because in farsighted person the image is formed at the back of retina so it must be move forward to make it exactly in the retina so convex converges so it will be forwarded.
A person who is farsighted needs a converging lens, which is a convex lens, to help focus light properly onto the retina. This type of lens helps to converge incoming light rays so that distant objects can be seen more clearly.
A person with myopia (nearsightedness) needs concave lenses to correct their vision. Concave lenses diverge light before it enters the eye, helping to focus the image correctly on the retina and improve vision for nearsighted individuals.
Convex lenses are thicker in the middle then the edges and concave are thicker at the edges then the middle. When light travels through lenses, refraction occurs. The light bends either outward or inward, it depends on the lens.The lens of your eye is a double convex lens. Its job is to focus the image on the retina of the eye. If one is farsighted, the lens in the eye causes the focus to be behind the retina. These people see far but have some difficultly seeing close-up.To correct this farsightedness, the person would wear glasses or contacts with convex lenses, for It is often used for close examination of small objects.
A far-sighted person should use convex lenses. These lenses help to converge the incoming light rays so that they focus correctly on the retina, correcting the vision for far-sightedness.
Both concave and convex lenses are used in improving sight. Concave lenses are used to treat myopia or nearsightedness (shortsightedness) because they change the light's focal point from "in front of the retina" to the proper location on the retina's surface. Convex lenses are used to correct hyperopia or farsightedness (longsightedness) by moving the focal point outward, because in a farsighted person the image is being focused "behind the retina."
The purpose of bifocals is to allow an individual to focus both near and far. Generally, an eyeglass prescription will be written for those nearsighted or farsighted. If you are nearsighted, the lens in the eye causes the focus to be in front of the retina and the person struggles to see far away because the lens is too long. To correct it, you would be given concave lenses in your eyeglasses. For farsightedness, you are prescribed convex lenses to correct the eye's short lens that causes the focus to be behind the retina and you struggle to see objects up close. Bifocals combines both types of lenses with the convex melded into the concave, allowing the individual to switch from a reading stance to viewing out.
For short-sightedness (myopia), concave lenses are used to diverge light before it reaches the eye, helping to focus the image correctly on the retina. For long-sightedness (hyperopia), convex lenses are used to converge light before it reaches the eye, assisting in bringing the image into focus on the retina.
concave lenses are prescribed by doctors
A farsighted person (hyperopic) has difficulty seeing nearby objects because the image is formed behind the retina. A convex lens is used to converge light rays so that the image falls on the retina, allowing clear vision. So, for a farsighted person, the convex lens corrects vision by focusing the image on the retina.
If im farsighted do i need glasses