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Convex lenses, which magnify, correct hyperopia. Below, is a previous wiki answer to this question in detail.
Convex are thicker in the middle and thin out at the edges. These lenses magnify and are used for reading glasses and to correct long-sightedness (hyperopia).
Concave lenses are thin in the middle and thick towards the edges. These lenses shrink things and are used to correct short-sightedness (myopia).
A good example of this is to take a spoon and look at your reflection in it. Looking at the concave side of the spoon (the front) will make you look smaller, looking at the convex side of the spoon (the back) will make you look bigge
What else can I help you with?
What is the difference between long and short sight?
Long-sightedness (hyperopia) means difficulty seeing close objects clearly, while short-sightedness (myopia) refers to trouble seeing distant objects clearly. Both conditions result from abnormalities in the eye's shape, affecting how light is focused on the retina. Glasses or contact lenses can correct these vision issues.
What do the ciliary muscles on the lens do when they see focus on something far away?
They pull the lens to make it long and thin.
Why does long sightedness happen?
Long sightedness, or hyperopia, occurs when the eyeball is too short or the cornea has insufficient curvature, causing light rays to focus behind the retina instead of directly on it. This can result in difficulty seeing nearby objects clearly while distant vision may remain unaffected. Factors contributing to hyperopia can include genetics and aging, as the eye's ability to focus can change over time. Corrective lenses or surgery can help manage the condition by altering how light enters the eye.
Is A meteor is a piece of an asteroid that exploded long ago A correct sentence?
Yes yes it is
How long does it take for the moon to do one orbit around earth?
If I am correct approximately one month.
What type of lens is used to correct long sightedness?
Convex lens is used to correct long sightedness (hyperopia). This lens helps to converge the light rays entering the eye, allowing the image to focus correctly on the retina.
Can the same lens be used to correct both short sightedness and long sightedness?
Yes, a lens can be designed to correct both short-sightedness (myopia) and long-sightedness (hyperopia) depending on the specific prescription needed. These types of lenses are called multifocal or progressive lenses, which have different sections to correct vision at different distances.
What do the lens do in the eye to help us see?
the lenses make objects look smaller than what they are so that people know what they look like.
Which lens is used for treating long sightedness?
Convex lenses are used to correct long-sightedness (hyperopia). These lenses are thicker in the center and thinner at the edges to converge light rays properly onto the retina, which helps to improve near vision for individuals with hyperopia.
How do glasses solve the problem of short and long sightedness?
Short and long sightedness are caused by the lens of the eye focusing the light either in front of or behind the retina. Glasses alter the path of light going into the lens to adjust for this.
How does a convex lens correct long sight?
A convex lens corrects long-sightedness (hyperopia) by converging light rays before they reach the eye's lens, allowing the focal point to fall directly on the retina. This adjusts the point of focus, helping to bring distant objects into clear view for individuals with hyperopia.
Why convex lens is used to cure long sightedness?
A convex lens is used to correct long-sightedness (hyperopia) because it helps to converge light rays onto the retina. In hyperopia, the light rays focus behind the retina, causing distant objects to be seen more clearly than close objects. By using a convex lens, the light rays are refracted so that they converge properly on the retina, allowing the individual to see both near and distant objects clearly.
Is 2 diopters a positive power?
If it is written as +2 Diopters it is positive, ie a converging lens. If it is written as -2 Diopters it is negative, ie a diverging lens. Diverging lenses are prescribed for myopia, or short-sightedness. Converging lenses are prescribed for hypermetropia or long-sightedness.
Can cadets having spectacles join the infantry of an army?
As long as the spectacles correct his vision to normal range then it should not prevent military participation.
What lens used to correct nearsightedness?
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.
Why do some people have difficulty seeing properly?
Because the lens (translucent layer of membrane over the iris) is either too thick, or too thin, causing light to be reflected at the wrong angle. There are two kinds of vision impairment: Long Sightedness Short Sightedness
Why do some people wear spectacles?
People wear spectacles to correct visual conditions such as hyperopia, myopia and presbyopia. Hyperopia (also known as long sightedness) is a condition where the eye cannot focus on near objects and in some cases the eye won't be able to focus properly on objects at any distance. A positive lens which is convex in shape (+ powered prescription) will be used for this condition. Myopia (also known as short sightedness) is the opposite. A myopic eye won't be able to focus on far away objects but a myopic eye can usually to focus on close up objects with ease. A minus lens which is concave in shape (- powered prescription) will be used to correct this condition. Prebyopia is a condition where the crystalline lens which is inside the eye becomes less flexible with age and loses the ability to focus on near objects. This condition is common for people over the age of 40 years. There are also other more complex reasons for people to wear corrective prescription lenses but these are the main reasons. Or sometimes you don't need them when ur young but ur eyes change as you get older so u may need them when ur older.
