Myopia and Hypermetropia
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- čas přidán 22. 08. 2024
- Myopia and Hypermetropia
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Myopia and hypermetropia are two common refractive eye conditions that affect a person's ability to see clearly at various distances. They are often referred to as nearsightedness and farsightedness, respectively.
Myopia (Nearsightedness):
Myopia is a refractive error in which a person can see objects clearly up close but has difficulty seeing distant objects clearly. It occurs when the eyeball is too long or the cornea (the clear front surface of the eye) is too steeply curved, causing light entering the eye to focus in front of the retina instead of directly on it.
As a result, distant objects appear blurry while close objects can be seen clearly. Myopia can develop during childhood and often progresses over time, especially in teenagers. It is commonly corrected with eyeglasses or contact lenses that have a concave (minus) lens prescription to help shift the focus of light back onto the retina.
Hypermetropia (Farsightedness):
Hypermetropia is a refractive error in which a person can see distant objects more clearly than nearby objects. It occurs when the eyeball is too short or the cornea is too flat, causing light to focus behind the retina instead of directly on it.
People with hypermetropia may experience blurred vision when looking at things up close, and they may have difficulty with tasks like reading or using a computer without correction. Hypermetropia can affect individuals of all ages and may be more noticeable as they age due to changes in the eye's lens elasticity. It is usually corrected with eyeglasses or contact lenses that have a convex (plus) lens prescription to bring the focal point of light forward onto the retina.
Both myopia and hypermetropia are common vision problems and can often be easily corrected with the appropriate eyeglasses or contact lenses.
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It's known as presbyopia, also called old age hypermetropia (as this defect is commonly observed in elders) and it can be corrected by wearing bi-focal lens.Thank You Sir
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The condition where both myopia and hypermetropia are present is called anisometropia. In presbyopia, near by objects cant be seen due weakening of ciliary muscles and diminishing flexibility of the eye lens.
If a person have both Myopia and Hypermetropia means they can't able to see nearby and far away object... It is known as Presbyopia... It can be corrected with Bifocal lens ❤
Presbyopia
bi focal lens is used to correct both myopia and hypermetropia. the upper part of bifocal lens is concave lens and lower part is convex lens
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Positive and negative states of the normal dynamic eye.
Depends on your perspective - that might be a mistaken assumption.
Such type of defect is called presbyopia and its corrected by Bifocal lenses..
Thank you SIR for making our concepts clear 🙏❤
Presbyopia is a defect in which a person are not able to see far object clearly as well near object . They appears to come blurred. This defect can be corrected by usin bifocal lens.
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If a preson is suffering from both myopia and hypermetropia, so he should use bifocal lens.
Super! Correct answer!!
That's called presbiopia bte
*byopia
Presbiopia can be corrected by using bi focal lens or concavo convex lens
There is no normal eye.
You are either myopia, of Hyperopia.
Hello Sir,
Biconcave and Biconvex lenses r used 4 both defect visions hypermetropia and myopia..thnx.. Respected sir u r videos r suchly too amazing and incredible pls continue uploading like this Videos on other topics also like heart etc and Reproduction etc ..❤😊😊
Both concave and convex we use for a person having myopia and hypermetropia
To correct presbyopia we have to use both concave and convex upper part concave lower part convex
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The condition is called is presbyopia usually seen in old people and they suggested to use bifocal lens
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I am one of them, who has both hypermetropia and myopia 😅
Bifocal lenses are used..
In my childhood I had hypermetropia and then I had myopia, and now I have both 🙃
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Bifocal lens is used for person having both myopia and hypermetropia ( presbyopia)
A nice presentation.
But normal eyes are not box cameras - that you must assume they are!
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Great explanation.. understood accurately
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Convex and concave lens is used for presbiopia.
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Great and easy explanation sir , thanku for this it would obviously help in eaxms .
For a parson having myopia and hypermetropia,they have to wear spectacle with progressive lens
I am wearing a concave lens
The person suffering from both myopia and hypermetropia is suggested to wear bifocal lens
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Both concave and convex lens is prescribed by doctor
Wonderful
Like concave lens form a virtual image of object at distance ..Do convex lens also form virtual image at the near point of eye
??
no..convex lens form virtual image only when object is between focus and pole. It is impossible for this case to occur in case of eye lens.
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Presbyopia both the concave and convex lens are been used
It can be corrected by wearing focal lens glasses
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Bifocal lens is used to fix both myopia and hypermetropia
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If both visions are blurry it is called presbyopia they should use bi focal lens
Sir does the both lenses form image at the far point (myopic eye) and near point(hypermetropoc eye) which acts like object for the eye lens it forms image on retina ?🤔 Pls solve the query 🙏
Presbyopia
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Thanks
We use concavo convex lens is it right answer sir
Concave lens is used in both conditions
Hii sir, why u kept biconcave lens front of the parallel rays in hypermetropia 6:48
But, why not u kept the biconcave lens before the parallel rays at the time of myopia 3:01
Please answer my question sir
Sir mentioned it already.... The near by object give divergent rays but distant object gives parallel rays thus in hypermetropia he uses a concave lens to show the diverging rays of the near object but in myopia he says rays of distant object (parallel).... This is the part where he mentions so 5:32
Hope it helps ❤
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a person having myopia and hypermetropia has to wear a spectacle, which contains both concave and convex lens i.e., both negative and positive power...
Very good Correct! It's called bifocal lens. Now we also get progressive lens.
Sir , I also have mayopia , is this a very serious disease
To use both lenses concave and convex
Chashmish students can easily understand more logically AND practically
Sould I wear specs while reading and using mobile? I have myopia i can read book very clearly when it's near me. I can't see only far things.
6:00 sir why you place concave lens between light rays and convex lens 😢
5:32 sir explained why he did so
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Dr I was told by an eye specialist that I have a lazyeye(right eye) and can not be fixed...is it true?
It is corrected by bi focal lens
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I have a doubt what happened in the case when people cannot see faraway object and nearby object
presbyopia , it can be correct by using bifocal lens
bifocal lens
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Bifocal lens is use to fix both myopia and hypermetropia sir
Both concave and convex lenses
Presbyopia, this defect we see in elders why because this defect comes as age .for this defect we use bi focal length lens
Bifocal lenses in used for both myopia and hypermetropia
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Hii sir, answer is bifocal lens
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BIFOCAL LENS✅
bifocal glasses are used for correction of presbiopia
Sir , can you plz tell me that why did you used the concave lens to diverge the rays of light in the case of hypermetropia?
Listen to this part ... Sir explained it 5:32
Good of you sir more grease to you elbow
Bifocal or Progressive Lens is used
defect = presbiopia
lens = bifocal lens
It's presbyopia and can be corrected by bifocal lens
Thank you sir