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If Jane is myopic. Will she need concave or convex lenses explain?
Wiki User
∙ 13y ago
Concave. With myopia, the focal point of the eye is in front of the retina. Concave lenses increase the distance of the focal point so that it lies on the surface of the retina.
Wiki User
∙ 13y ago
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What is antimetropia?
Antimetropia is a form of antisometropia in which one eye is myopic and one eye is hyperopic.
Is antimetropia a refractive disorder?
Antimetropia is a definition of the type of refractive error you (or someone) may have. It means that one eye is hyperopic (farsighted) and the other myopic (near sighted).
Is visually impairment dominant or recessive?
By "wearing glasses" I assume that you mean an eye condition such as nearsightedness or farsightedness. Abnormal vision can be caused by multiple genetic as well as enviromental factors. Some genetic factors can increase the perpencity that the eyes will develop a problem. To give a definite "yes" or "no" to your question would be an oversimplification.
What would happen if the speed of light was infinite?
technically the speed of light is not infinite. but passing the speed of light meansthat you would travel backwards in time. so if the speed of light is infinite, thenthe years that passed will get brighter and brighter. So ancient times would beburned to crisp while the future would be dim. the concept here is that light dimsas the farther you travel forward in time. that is because all the light is past thespped of light so they travel backwards in time.============================Thinking in terms of a few things that are the way they are today because of thefinite speed of light, this becomes a fascinating question to ponder. For almost allof human history, until only the most recent few moments, it made no difference.But I can think of a few modern cases where it does:-- Radio communication.Radio, TV, cellular, GPS etc. all become much more reliable, as 'multipath' fadingceases to exist. Multipath fading is attenuation arising from the phase differencebetween the direct and the reflected signal, due to the difference in transit timeover paths of different lengths. With infinite propagation speed, there is no delayover a longer path, so no phase difference at the receiver. All rays add !-- Stars no longer 'twinkle'.Scintillation of an optical point source is exactly the same multipath fading fromthe radio world.-- Laser holography . . . not possible.-- Directional antennas ... Yagis, ham beams, log periodics, AM tower arrays, any'parasitic'structure ... are no longer directional. But I think parabolic reflectors still work.-- Fermat's Principle ... which I no longer understand ... involving, as it does, the speedof light, is out the window. The laws of reflection and refraction don't depend on Fermat,but they can be derived from it. Since it no longer holds, you don't suppose . . .-- Young's experiment, coherence, interference from thin films, Michelson's interferometer,diffraction, Bragg's Law . . . all gone.-- GPS can't exist ! At least not the way it operates now. The device in your handor in your car compares the different lengths of time it takes for the GPS signals toreach you over the different distances from several satellites in different places. Ifthe speed of light (and radio) is infinite, then it makes no difference where you areor where the satellites are. It takes no time for any signal to reach you from any bird.-- And if the speed of light is infinite in all media ! ! . . . no refraction. Goodby to Snell,lenses don't work, spearing fish is no problem as long as you're not severely myopic, andthe pencil still looks straight when half of it is under water.-- Woo hoo ! You MUST be myopic ! Just like everybody else in the world. MAYBEyou can form a workable visual image of an object at infinity, by stopping your pupilsdown to pinholes, I don't know. But for nearby objects, forget it ! The cornea, the lens,the humors, nothing can help your focus.-- Driving: Police radar still detects your car, but I think the Doppler shift is gone,so your speed can't be measured with it.-- Same for Doppler weather radar. It has no advantage over older radar. It tells youthat a thunderstorm cell is right there, but it can't tell you anything about winds orrotation inside the cell.-- Oops. Sorry. Radar doesn't work too well at all. It can still tell you the directionto the target, because that's the direction where you send a burst and some of itcomes back. But it can't tell you the distance to the target, because the echoreturns from a near target or a far target at the same time.In fact, maybe the whole echo-detection scheme can't actually be implemented inhardware, because echoes return in zero time, before you've ever had a chance toturn off your burst transmitter and listen for the echo.-- Which brings us to Astronomy and Cosmology: We can see the status of everyobject in the universe that's bright enough for us to detect, right now. We can'tsee the evolution or distribution of galaxies in the early universe ... no "lookingbackward in time". No red shift, no blue shift, so we can't detect radial speeds,and we lose most or all of the overwhelming body of data that's explained now bythe concept of the "expansion" of the universe.-- Relativistic effects: As mind-bending as this is under 'normal' circumstances, it'smore so if we imagine a fundamental change in the nature of light.. . . We know right away that speed no longer affects mass, and that the Lorentz contractionand time dilation both go away, because no matter how fast you move, v2/c2 is always zero.. . . It becomes a lot easier now to accelerate your car or your spaceship all the wayto 3 x 108 meters per second, but now, that's still 0% of the speed of light !. . . Photons can now have rest-mass if they want it. And if they don't then their massis still zero when they're whizzing about.. . . But then, how can photons carry energy ?. . . Does that mean that E = mc2 goes away ? Well phoo, I guess it had to anyway,as soon as 'c' became infinite.Those are the first few minor consequences of infinite light speed that I can think of just now.
What kind of lens is a converging lens?
Convex lenses, also known as plus powered lenses, do cause light to converge. This type of lens is used on a Hyperopic (farsighted) patient. Concave lenses cause light to diverge and are used on Myopic (nearsighted) patients.
What is another name for a convex lens?
Concave and convex can refer the types of lenses used to treat refractive errors in the eyes. Concave is another word for myopic lens and convex is another name for a hyperopic lens also known as nearsighted and farsighted respectively
Are most glasses lenses biconcave or biconvex and which corrects short sighted vision?
Most lenses are actually a meniscus design. the front curve is the base curve and the back side is either more or less curved than the base curve. Since most people are myopic (near-sighted) their lenses are usually a simple concave design rather than biconcave. Biconcave lenses are generally reserved for extremely high myopic prescriptions.
Are you long sighted if you are myopic?
A myopic person is a near sighted person
What is a short sighted person called?
Myopic, or nearsighted. Myope, (Myopic is the condition not the person)
How is the word myopic used in a sentence?
The old teacher's rude comments about children led me to believe he was myopic.
What type of lens do near sighted people need?
the lenses used for near sighted people are cancave lenses so that the image forms farther back on the retina and for far sighted people, a convex lens is used to make the image fall right on the retina!! =D XD hope this helped!! :)
Antonym for myopic?
farsighted
My son is myopic. Does it mean all the kids born to be will be myopic?
I understand treatment with injection of one's own (adult) retinal stem cells is available in Germany. Patients have primarily had age related macular degeneration but a few have had myopic degeneration.
Is there a word that is the antonym of myopic?
far-sighted
What does it mean to have a -2.25 glasses prescription?
you are myopic.
When is person said to be a myopic?
i think it's a fortuneteller
