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What lenses would you use for short sightedness and long sightedness?
Wiki User
∙ 13y ago
far short sight you can use concave lenses
far long sight you can use convex
Wiki User
∙ 13y ago
Wiki User
∙ 14y agoA pair near sighted glasses will be suitable for a short sighted person. You can read more information at www.affordableeyewear.net/faq.htm
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What everyday uses can you find for a convex and concave mirror?
Not sure about mirrors but convex and concave lenses are used to treat conditions such as long/short sightedness.
How does the eye respond to light rays to manifest long sightedness?
how does the eye respond to light rays to manifest far sightedness
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.
What type of lens are used to correct vision problems?
It depends on what the vision 'problem' is. Convex lenses are used to correct short-sighted errors, while concave lenses correct long-sighted problems.
Which type of scissors would be better suited to cut a piece of metal one with long handles and short blades or one with short handles and long blades?
A pair of scissors with long handles would be ideal, because you can produce more torque when you close your fingers a further distance from the pivot point. In short: long handle, short blade.
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.
What everyday uses can you find for a convex and concave mirror?
Not sure about mirrors but convex and concave lenses are used to treat conditions such as long/short sightedness.
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.
What type of lens is used in spectacles to correct long sightedness?
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 biggeRead more: Which_type_of_lens_magnifies_-_convex_or_concave
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.
What causes short sight and how it can be fixed?
Myopia, or near-sightedness, is caused because the eyeball is too long in relation to the focusing power of the lens onto the retina. This causes the image to be focused at a point in front of the retina rather than on top of it. There are two ways to correct this: corrective lenses (eyeglasses or contact lenses) or surgery.
What kind of lenses would a farsighted person need to correct their vision?
Hyperopic, plus powered, or convex lenses.
Can two short sighted people have a long sighted baby?
Yes. Short sightedness (myopia) is an acquired characteristic. The baby may or may not have myopia when he is born, and may acquire long/short sightedness based on lifestyle. If two people lose their arms in an accident, their child won't be born handless. Similar logic applies.
Why are lenses useful?
If you are talking about lenses glasses. They help people see long distance or short
When people are myopic are they long sighted or short sighted?
They're short-sighted. Yes, the term "Myopia" means short sightedness. This means that light entering the eye is focused in front of the retina rather than on it. The opposite term is "Hyperopia" which means long sightedness. This means the light entering the eye is focused behind the retina rather than on it.
Why can people without glasses can see close up and far away?
Because they do not have eyesight problems like long-sightnedness, short-sightedness or astigmatism.
How does the eye respond to light rays to manifest long sightedness?
how does the eye respond to light rays to manifest far sightedness
