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If you are farsighted, meaning that you can see far but you can't see objects close up, that means your eye is too short in terms of the distance of your retina to your lens. The image focuses behind the retina, so it becomes blurry. When you add a convex lens, it will help bend the light more and converge the light rays onto the retina, so you will see the image clearly.
If you are nearsighted, your retina is farther away from your lens, so the image is focusing in front of your retina, so you can't see distant objects. That's when you need a concave lens. Concave lens will diverge the light rays onto the retina.
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What does a telescope do to improve your vision of the night sky?
It magnifies the available (ambient) light. Night-vision technology amplifies available light by as much as 40,000 times.
How Carrot is good to what part in your body?
carrots contain many useful nutrients such as vitimin C. they are most famouse for the effect they have on your eyes which is to improve night vision
Why do Marines' binoculars scopes etc have tape on them leaving only a stripe of the lenses exposed?
I'm not 100% on this but would assume that it would to bet to remove the chance of reflection of the lenses, it also cuts down on the light entering the optic, however doesn't obstruct your vision. I assume you saw this on generation kill?
How do carrots help your vision?
They provide minerals and vitamins that improve your eye sight, and some scientists think that they may even help you see in the dark.
How much bigger a microscope make things appear?
the ability of a microscope to enlarge is called magnification.
What type of lenses help correct vision problems?
Concave and Convex
What are the different types of lenses?
convex and concave are two types of lenses that are used to correct defects in vision.
What kind of lenses would a farsighted person need to correct their vision?
Hyperopic, plus powered, or convex lenses.
What are eyeglass?
What are eyeglasses? They are lenses, either concave or convex, within a frame and they are worn on your face upon your nose if you have unclear vision.
What are the two types of vision?
Convex and Concave are the two types of lenses.
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.
When a person is far sided do the need a concave lens or convex lens?
Farsighted people use convex lenses to correct their vision.(This is the correct answer!)
Why cannot the lenses in eyes be concave in shape?
BECAUSE YOUR EYES ARE SHAPED CONVEX LIKE MEANING THEY CURVE OUTWARD BUT IF THEY WERE TO BE CONCAVE YOUR VISION WOULD BE BLURRED AND WOULD DAMAGE EVERYTHING IN YOUR EYES LIKE THE PUPIL AN CORNEA
Can you explain what convex optimization is?
Convex optimization is the process of enhancing the vision that convex mirrors and lenses can provide by adjusting the angle of the convex lenses to the perfect most apt angles separating them apart so as to enhance the field of vision and effectiveness.
What is a convex and a concave lens?
CONCAVE LENS : lens that atleast possess one end inwards is called as concave lens. CONVEX LENS : lens that atleast possess one end outwards like the exterior of the sphere is called convex lens. According to the medical values convex lens are used for long sight vision problem and concave lens for short sight vision problems.
What are the tpyes of lens that bulges outward?
A lense which bulges outwards is a convex lense.Additionally, a lense which bulges in is called a concave lense. You can remember the difference by thinking about the fact that a cave is like an inward bulge in a cliff, and the inward-bulging lenses are concave.
Which type of lens magnifies convex or concave?
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 bigger. A concave mirror can magnify. Convex mirrors always shrinks things. They are used sometimes in offside rear vision mirrors for vehicles. A concave mirror will also shrink things if you look at the mirror from far enough away and the object you look at is also far away (but you wouldn't want to use it for a rear vision mirror because it then also turns stuff upside down). Concave lenses disperse light rays outward, rendering it impossible for them to focus incoming light onto a plane surface. Their "focus" is virtual, behind the lens on the side of the light source. If the concave surface is used as a reflector, it will form a real image. This is the basis for reflector telescopes. Further info: http://en.wikipedia.org/wiki/Lens_(optics)
