Тёмный

Farsighteness vs. Nearsightedness, An Explanation 

Step by Step Science
Подписаться 208 тыс.
Просмотров 161 тыс.
50% 1

In this video Mr. Swarthout goes over the difference between farsightedness and nearsightedness. Included is a description of why this vision problem occurs, what can and cannot be seen, the types of lenses used for vision correction and how the lenses change the path of the light rays entering the eye.
You can a listing of all my videos from my website, www.stepbysteps...

Опубликовано:

 

15 сен 2024

Поделиться:

Ссылка:

Скачать:

Готовим ссылку...

Добавить в:

Мой плейлист
Посмотреть позже
Комментарии : 359   
@catherinefusini5237
@catherinefusini5237 8 лет назад
I appreciate human beings like you and your existence. Thank youuuuu
@stepbystepscience
@stepbystepscience 8 лет назад
That is very nice of you to say. You can see a listing of all my videos at my website, www.stepbystepscience.com
@marissaberlanga2124
@marissaberlanga2124 7 лет назад
Thank you so much for providing such a straightforward video about the difference between Hyperopia and Myopia and how these vision problems can be corrected! The illustrations helped make it way easier to understand and visualize the whole process! Wonderful video, thank you so much!!
@xlulonax5768
@xlulonax5768 7 лет назад
I'm nearsighted in one eye and farsighted in my other...im both and just found out today...its really rare
@stepbystepscience
@stepbystepscience 7 лет назад
Just like my wife. She can see out of both eyes but her brain only use the information from her left eye. She has no depth perception and can not light a candle!
@maya4660
@maya4660 5 лет назад
Just like someone I know
@mturrentine-
@mturrentine- 5 лет назад
I’m rare to i have fractal hyperopia TwT I don’t know the percentage but I think it’s like 6 or something
@khyra8954
@khyra8954 4 года назад
I’m both in both eyes
@clairalison8389
@clairalison8389 3 года назад
I have the same condition. I just found out yesterday
@JamesByrne-vt8ns
@JamesByrne-vt8ns 4 месяца назад
I intend to use this at the Lion's Club free Vision Clinic for the indigent to explain the concepts to our clients. Your narration and graphics are just what are needed to occupy them while they await their exam.
@stepbystepscience
@stepbystepscience 4 месяца назад
Thank you so much for your comment, I'm glad this video will help people in need.
@varunmangal9993
@varunmangal9993 4 года назад
bruh, by far the best explanation I found on this stuff. Finally after like three years I understand the concept.
@stepbystepscience
@stepbystepscience 4 года назад
Thank you very much for the great comment
@levonderbrinkley3804
@levonderbrinkley3804 3 года назад
I loved this! I am an educated 64 years old and have worn glasses most of my life, but did not know this information.
@stepbystepscience
@stepbystepscience 3 года назад
So glad you learned something! Thanks for your comment.
@crazybanana6150
@crazybanana6150 6 лет назад
It is kinda weird to think that people with far sighted have it harder to see going closer? Really, I thought if you go closer it would be better right?! P.S I am near sighted.
@wassimnash
@wassimnash 5 лет назад
Crazy Banana it is weird but you can control it. I am far sighted
@snaidnietahi4654
@snaidnietahi4654 5 лет назад
I am nearsighted as well. My eyes suck, they have since childhood. All I see is silhouettes at a distance without contacts or glasses. The really strange thing is although my eyes are still awful, the eye Dr. says my eyes have improved by about 30% in the last 10 years. I never did anything but rotate wearing contacts and glasses like I always do. I figured eyes got worse as you got older, not better. As far as "farsightedness" goes, it seems weird as hell to think that some people basically have it switched. I couldn't imagine how it feels not being able to see close up.
@dbcnetwork6910
@dbcnetwork6910 4 года назад
Short sighted means nearsighted right
@HS-eq3gk
@HS-eq3gk 4 года назад
@@snaidnietahi4654 I'm meant to wear my glasses more (not all the time), but I have kind of grown to just live with not being able to see things that well which are far away, if I need to I'll wear my glasses, e.g. in school, weirdly I kinda like not being able to see things in high "detail" all the time
@pm829
@pm829 6 лет назад
Awesome, clear & understandable explanation. Thank you, thank you, thank you.
@stepbystepscience
@stepbystepscience 6 лет назад
You are very welcome.
@ryandoyle7664
@ryandoyle7664 4 года назад
Best video i have seen on this topic. I work in optics and it is nice just to have a refresh.
@stepbystepscience
@stepbystepscience 4 года назад
Glad you liked it and thanks for the comment.
@christaaaa_
@christaaaa_ Год назад
Thank you so much for this video! I have been struggling with this concept and you made it so simple!
@stepbystepscience
@stepbystepscience Год назад
You're so welcome, glad it was helpful!
@yordanosbeyene4538
@yordanosbeyene4538 2 года назад
Thanks so much for this video, you got straight to the point and actually put lots of relevant and important information into each slide.This will really help me with my exam!
@stepbystepscience
@stepbystepscience 2 года назад
Glad to hear, best of luck on the exam.
@adashofflavour3717
@adashofflavour3717 3 года назад
very clear, simple and straight to the point. You can not beat this!! thank you very much.
@stepbystepscience
@stepbystepscience 3 года назад
Thanks for your comment, it's much appreciated!
@shamimnaz1835
@shamimnaz1835 7 лет назад
I was very much confused with the concept of near and far sightedness but you easily clear it Thankss.
@stepbystepscience
@stepbystepscience 7 лет назад
Awesome and thanks for the comment. You can see a complete listing of my videos at www.stepbystepscience.com
@liliadiaz9338
@liliadiaz9338 4 года назад
Awesome video! Straight forward and easy to understand. Mneumonic to help remember: Need Medical Doctors For Healthy Children. (Nearsightedness is the same and Myopia, can correct with Diverging lens. Farsightedness is the same as Hyperopia, can correct with Converging lens.)
@stepbystepscience
@stepbystepscience 4 года назад
Awesome way to remember near and far sighted, will use with my students this year.
@rogerclarke2233
@rogerclarke2233 7 лет назад
the eye looks like a stuffed olive Blink💪
@galaxyvlogs6354
@galaxyvlogs6354 7 лет назад
im nearsighed
@kylaxo3937
@kylaxo3937 6 лет назад
Same
@thegoldensea_
@thegoldensea_ 6 лет назад
Galaxy vlogs yeah, me too. Sucks to have unhealthy eyes. My brother were lucky to be the only family members to don't wear glasses
@lizabell9461
@lizabell9461 6 лет назад
Me too but very minor but I’m still getting glasses because I have trouble seeing captions on a T.V
@latewayzx8015
@latewayzx8015 6 лет назад
Same
@RodyToRick
@RodyToRick 5 лет назад
If you're nearsighted, your eyes are still healthy, unless if you have diabetes or cancer.
@blairmoorer8460
@blairmoorer8460 4 года назад
I really appreciated this clarification, especially with introducing the corrective lenses! Thank you so much!
@stepbystepscience
@stepbystepscience 4 года назад
Thanks for the comment.
@sukantabhattacharya548
@sukantabhattacharya548 7 лет назад
Thank you very much. Helped me a lot for my 8th grade half yearly examination. The lens video is really cool to! Thanks once again!
@kartikPanwar07
@kartikPanwar07 6 лет назад
Your explanation was really nice and easy to understand gave me a lot of help for my exams 😊
@stepbystepscience
@stepbystepscience 6 лет назад
Hope the exams go well, thanks for watching and commenting.
@emmanuel_dean
@emmanuel_dean 3 года назад
Simple, to the point, perfect! Exactly what i needed
@stepbystepscience
@stepbystepscience 3 года назад
Glad to hear that and thanks for watching!
@maeEllis-yx9tj
@maeEllis-yx9tj 5 месяцев назад
You explained this topic so well. Thank you
@stepbystepscience
@stepbystepscience 5 месяцев назад
You're very welcome!
@imad7995
@imad7995 9 лет назад
Great and clear video ! Would love if you could make a video on "Electromagnetic Spectrum" too, whenever you find the time !
@kristinedemark4828
@kristinedemark4828 6 лет назад
Thank you! This really helped my classes understand this concept!
@davevargo6256
@davevargo6256 7 лет назад
Thanks so much for your explanation. I'm taking a bunch of donated eyeglasses to Honduras this fall. We will fit them to folks in fairly primitive situations. The info you provided helps
@stepbystepscience
@stepbystepscience 7 лет назад
Sounds like a great trip, hope it goes well.
@genesisnunez2928
@genesisnunez2928 6 лет назад
Dave Vargo WOW... I'm From Honduras
@alexisprice8574
@alexisprice8574 7 лет назад
Thank you for making that very clear! That helps a lot for my anatomy test !
@stepbystepscience
@stepbystepscience 7 лет назад
Hope the test goes well. You can see a listing of all my videos a my website, www.stepbystepscience.com
@avamk9580
@avamk9580 7 лет назад
your videos help me so much!! thank u x millions
@stepbystepscience
@stepbystepscience 7 лет назад
Great they are helpful for you and thanks for commenting.
@nathanelleeveillard7159
@nathanelleeveillard7159 7 лет назад
I'm nearsighted.
@stepbystepscience
@stepbystepscience 7 лет назад
Me too!
@bananaman7646
@bananaman7646 5 лет назад
Nathanelle Eveillard same
@belchapantoja8617
@belchapantoja8617 4 года назад
Same here
@zakarovlina
@zakarovlina 8 лет назад
You are such a good teacher
@stepbystepscience
@stepbystepscience 8 лет назад
+Moussa Harb That is such a nice comment. You can see a listing of all my videos at my website, www.stepbystepscience.com
@loreaver3882
@loreaver3882 6 лет назад
Step-by-Step Science yeah this guy reminds me of one of my teachers
@boakyeduan563
@boakyeduan563 3 года назад
Great explanation and animation!!
@stepbystepscience
@stepbystepscience 3 года назад
Glad you liked it and thanks for the comment!
@rajsoniminde9578
@rajsoniminde9578 7 лет назад
Beautiful video it was crisp and clear to understand.
@stepbystepscience
@stepbystepscience 7 лет назад
Thanks for the comment. you can see a listing of all my videos at www.stepbystepscience.com.
@mr.perfect8839
@mr.perfect8839 6 лет назад
Amazing video...helped me a lot for my preparation
@mosirapilivi
@mosirapilivi 5 лет назад
Awesome straightforward explanation!
@stepbystepscience
@stepbystepscience 5 лет назад
Thank you very much for the positive comment.
@NS-ej9jw
@NS-ej9jw 7 лет назад
Is there any way u can fix near sidedness
@stepbystepscience
@stepbystepscience 7 лет назад
Glasses or many there are some eye exercises that you can do. You can see a complete listing of my videos at www.stepbystepscience.com.
@maya4660
@maya4660 5 лет назад
@@stepbystepscience did he way I didnt hear him that a goooood answer
@calciclasses
@calciclasses 4 года назад
Superb explanation sir... Thanks a lot
@stepbystepscience
@stepbystepscience 4 года назад
You are very welcome.
@thearatha2767
@thearatha2767 4 года назад
simple explaination and easy to understand. Thank you very much.
@stepbystepscience
@stepbystepscience 4 года назад
Glad you liked it and thanks for commenting.
@Iftikharali
@Iftikharali 6 лет назад
very good explanation. Thank you.
@stepbystepscience
@stepbystepscience 6 лет назад
Thank you for watching and commenting.
@meetan-
@meetan- 7 лет назад
I am 70... Now only I understood these terms... Thanks
@stepbystepscience
@stepbystepscience 7 лет назад
You are welcome.....Better now then never!
@lindseylauer3128
@lindseylauer3128 4 года назад
Get explanation. Thank you for making it clear and simple
@stepbystepscience
@stepbystepscience 4 года назад
You are welcome! Thanks for the comment.
@ravishmirividahara8000
@ravishmirividahara8000 4 года назад
Its was really good and can you teach how to correct that sightnesses by drawing line diagrams
@stepbystepscience
@stepbystepscience 4 года назад
I believe that is in the video.
@justalittletoxik7383
@justalittletoxik7383 8 лет назад
this actualy helped me ALOT with a science exam i have soon thank you
@stepbystepscience
@stepbystepscience 8 лет назад
+Eliam Tice Great, I hope the exam goes well. You can see a listing of all my videos at my website, www.stepbystepscience.com
@indianchannel3699
@indianchannel3699 7 лет назад
Its very Helpful thanks for making this video now I understand more about eyes.
@stepbystepscience
@stepbystepscience 7 лет назад
They are very interesting! Thanks for commenting!
@BlueUKLouis
@BlueUKLouis 3 года назад
Beautiful, thank you!
@stepbystepscience
@stepbystepscience 3 года назад
You're welcome!
@beaver_squeezer4226
@beaver_squeezer4226 6 лет назад
Very well explanation & great video, wished my optician manger was you.
@zaramahajan8603
@zaramahajan8603 Год назад
Thank you so much! You are a lifesaver.
@stepbystepscience
@stepbystepscience Год назад
Glad to be of help!
@JoseTorres-fy2nb
@JoseTorres-fy2nb 6 лет назад
Really helped me understand eye condition more clearly! I
@elizabethnguyen7677
@elizabethnguyen7677 5 лет назад
Very helpful video, thank you.
@stepbystepscience
@stepbystepscience 5 лет назад
Step-by-Step Science • 1 second ago You are very welcome, thanks for commenting.
@AdminHouse
@AdminHouse 5 лет назад
You can experience "temporal" farsightedness right now! 1. Lay down in a bed 2. Look at one object then another very fast. 3. You will eventually experience Temporal Farsightedness!
@stepbystepscience
@stepbystepscience 5 лет назад
Wow, freaky!
@artpop4976
@artpop4976 6 лет назад
My eyegrade is 2.50l and 1.50R. why does my eyes are so sensitive with light?
@dmlx4209
@dmlx4209 4 года назад
I’m nearsighted, whenever Im gaming I cant see far away and get get a lot of pain from straining/squinting hard to try and see who’s there.
@stepbystepscience
@stepbystepscience 4 года назад
Bummer
@nandithaiyer5765
@nandithaiyer5765 4 года назад
Very nice explanation sir
@stepbystepscience
@stepbystepscience 4 года назад
Thank you for the positive comment.
@ezra2180
@ezra2180 6 лет назад
The best explanation
@hbsbb1
@hbsbb1 7 лет назад
Terrific video! Really clear description! Thanks
@syedabrar3477
@syedabrar3477 5 лет назад
Diagram for the 1st case is wrong........Eye is able to bend parallel light rays easily but isn't able to bend the diverging rays coming from the near objects. As a result, it is able to see far object clearly as they are focussed on the retina whereas it can't see the near objects as it isn't able to converge them sufficiently due to low converging power of the lens.
@yammilevargas430
@yammilevargas430 5 лет назад
HOLYSHIT. I FINALLY FUCKING GOT THIS! WHY DIDN'T I FIND THIS VIDEO SOONER?
@prasannakapu3018
@prasannakapu3018 7 лет назад
Well explained, thank you
@purushothamreddy1206
@purushothamreddy1206 6 лет назад
That's good ur explanation is marvellous
@itsmebeyonder
@itsmebeyonder 4 года назад
I have astigmatism in both eyes but only my left eye has nearsightedness. I also develop a condition called lazy eye.
@stepbystepscience
@stepbystepscience 4 года назад
My wife has a lazy eye also.
@itsmebeyonder
@itsmebeyonder 4 года назад
@@stepbystepscience oh. Lazy eyes can be extra annoying, even by wearing an eyeglass doesn't fix it.
@Shawnblue
@Shawnblue 8 лет назад
I like your presentation. I have myopia.
@carl108
@carl108 5 лет назад
Can't like this enough!
@stepbystepscience
@stepbystepscience 5 лет назад
Did you subscribe, that would go a long way.
@monasawant2697
@monasawant2697 6 лет назад
Thanks it helps me to learn more
@bereruter0
@bereruter0 7 лет назад
you say the muscles around your lens can change, so you can naturally cure it then? if you train that muscle?
@umarecol81
@umarecol81 7 лет назад
i have a question about a person with myopia : so they put concave lenses so they can get a clear vision. But what happens if the eye accumulates WITHOUT a concave lens when the object is near? (I know that the eye without the accommodation with an object that is near makes a clear vision, but when the eye accomodates does it make the vision worse? (because there is more breaking of light?)
@sunshinealtheabelizar872
@sunshinealtheabelizar872 3 года назад
Thank you so much this help me alot
@stepbystepscience
@stepbystepscience 3 года назад
You're welcome!
@sangeethstanly7618
@sangeethstanly7618 4 года назад
Its very clear explanation sir.thanku.
@stepbystepscience
@stepbystepscience 4 года назад
You're most welcome.
@m320d3
@m320d3 6 лет назад
Thank you 🙏🏻 the video helped me so much!!!
@stepbystepscience
@stepbystepscience 6 лет назад
Thanks for watching and commenting
@ouss991
@ouss991 7 лет назад
great explanation
@13thChip
@13thChip 4 года назад
Can the diverging lens used to correct myopia cause eye muscles to strain more when reading at short distance? I am short sighted and started recently experiencing a problem where when I wear glasses to see far objects, i cant focus on small letters while reading. I have to look outside my lens or take the glasses off and the small letters become clear even at short distances. Do i have hyperopia and myopia as well? This is a recent experience and I never faced this problem while wearing glasses to correct my short sight. I have been wearing glasses to correct short sight since I was 8 years old and now I am 43.
@jakleenyaqoob5515
@jakleenyaqoob5515 8 лет назад
great explanation. is there a way to fix nearsighted and far sighted without wearing glasses. i'm nearsighted and everytime I wear glasses, it makes my vision blurry :/
@Crazybrony-bi6zg
@Crazybrony-bi6zg 7 лет назад
Well, are the glasses correctly prescribed?
@marilup9657
@marilup9657 5 лет назад
Thank you!!! Easy way to understand
@gabby5211
@gabby5211 7 лет назад
this will help me so much in gsat thank you
@maajidthanksforyourhelpqee1072
Hi I'm near sighted, and I don't want to wear a glasses, please can you tell me something better glasses thanks.
@muhammadishaq1596
@muhammadishaq1596 6 лет назад
nice work ...thanks
@stepbystepscience
@stepbystepscience 6 лет назад
You are very welcome, thanks for the comment.
@renzfiesta3601
@renzfiesta3601 7 лет назад
I'm 10 y/o I'm near sighted (a little) and I'm doing some eye exercises and it work for a few weeks :)
@stepbystepscience
@stepbystepscience 7 лет назад
Renz Fiesta Hope it helps.
@renzfiesta3601
@renzfiesta3601 7 лет назад
Step-by-Step Science yes it helped me a little I will do more eye exercises to restore my vision!!
@loganallred4589
@loganallred4589 7 лет назад
I enjoyed this video, it was helpful. Thank you.
@priyalinu2721
@priyalinu2721 6 лет назад
Very good explanation sir 👍👍
@dr.kallolchakraborty
@dr.kallolchakraborty 7 лет назад
that's very nice xplanation
@expiravitmortemsanguis8690
@expiravitmortemsanguis8690 7 лет назад
I'm VERY near sighted
@vnqy920
@vnqy920 6 лет назад
Expiravit MortemSanguis same man :( I can't see things from a metre away
@HoldHandsHerron
@HoldHandsHerron 5 лет назад
Vnqy Same and I don’t like wearing glasses at home so I’m so blind
@kwabenaboakye1367
@kwabenaboakye1367 6 лет назад
Thank you for the video! Helped me so so much...
@trevorsmallwood6899
@trevorsmallwood6899 6 лет назад
thx it really helped do my homework :-)
@Kem9s
@Kem9s 3 года назад
Thank you 🙏🏻
@stepbystepscience
@stepbystepscience 3 года назад
You’re welcome !
@brendafields3543
@brendafields3543 7 лет назад
No, I'm far sighted. When you are far sighted you do not have blurryness when you are close up to something, you just don't see your surroundings upon you. If you are far sighted put your finger up to your eye and if you see blurryness around you that's what far sighted is. Atleast for me.
@sanariax
@sanariax 5 лет назад
Just loved the lecture, ❤
@stepbystepscience
@stepbystepscience 5 лет назад
Very nice, thanks for letting me know!
@yeshabie1122
@yeshabie1122 6 лет назад
I can only see the things if near but i cant see or read anything if far ??
@stepbystepscience
@stepbystepscience 6 лет назад
very interesting.
@vikasputla
@vikasputla 5 лет назад
Thanks for the video!... It helped me.
@stepbystepscience
@stepbystepscience 5 лет назад
Thanks for letting me know
@kumarikumari4766
@kumarikumari4766 4 года назад
Thanks a lot 🌺
@stepbystepscience
@stepbystepscience 4 года назад
You are very welcome.
@nathanrumpf5660
@nathanrumpf5660 6 лет назад
Great video. Thanks!
@stepbystepscience
@stepbystepscience 6 лет назад
You are very welcome!
@preetidwivedi6904
@preetidwivedi6904 6 лет назад
It's very useful..thankyu sir
@shabnamkavakeb648
@shabnamkavakeb648 5 лет назад
thank you very much
@stepbystepscience
@stepbystepscience 5 лет назад
You are very welcome.
@pelhamh
@pelhamh 5 лет назад
Well done
@stepbystepscience
@stepbystepscience 5 лет назад
Thank you.
@gnarleypunkroker5
@gnarleypunkroker5 7 лет назад
out of curiosity on the image you have - could you be so near sighted that a converging lense would spread the light rays out so far they dont contact the lense bit of your eye, therefore making them not work to solve the issue?
@stepbystepscience
@stepbystepscience 7 лет назад
Do you mean a diverging lens??? If they are the wrong strength they they do not work. You can see a listing of all my videos at my website, www.stepbystepscience.com
@kunalkanase7877
@kunalkanase7877 5 лет назад
Thank you.
@stepbystepscience
@stepbystepscience 5 лет назад
You are very welcome, thanks for commenting!
@AlcaraMariizz
@AlcaraMariizz 5 лет назад
very helpful!
@stepbystepscience
@stepbystepscience 5 лет назад
Thanks for watching and commenting.
@chelzyyy2932
@chelzyyy2932 6 лет назад
I'm near-sighted 😐
@ruhidhiman6446
@ruhidhiman6446 4 года назад
Tnx ...
@stepbystepscience
@stepbystepscience 4 года назад
you are very welcome
@LearningWithShah
@LearningWithShah 3 года назад
Very good 👍
@stepbystepscience
@stepbystepscience 3 года назад
Thank you 👍
@baddy_leyahlove3842
@baddy_leyahlove3842 5 лет назад
Nearsighted 2019 anyone
@blessed6403
@blessed6403 4 года назад
Nope 2020
@jojogymjl
@jojogymjl 6 лет назад
We call it short sighted or long sighted
@stepbystepscience
@stepbystepscience 6 лет назад
Cool!
@khosrosoltani3758
@khosrosoltani3758 6 лет назад
Thank you dear...
@cocoarecords
@cocoarecords 9 лет назад
Enjoyed it thanks man !
@stepbystepscience
@stepbystepscience 9 лет назад
cocoarecords Great just loaded it up this morning! Thanks for the comment!
@lyndsayastor9668
@lyndsayastor9668 6 лет назад
thank you
@stepbystepscience
@stepbystepscience 6 лет назад
You are very welcome, thanks for watching and commenting.
Далее
Куда пропали ЗДРАЙВЕРЫ?
11:38
Просмотров 599 тыс.
How big is a visible photon?
20:34
Просмотров 729 тыс.
Why graphene hasn’t taken over the world...yet
7:43
Common Refractive Errors Of The Human Eye
10:56
Просмотров 116 тыс.
Aristotle's Wheel Paradox - To Infinity and Beyond
13:14
Lenz's Law
15:54
Просмотров 6 млн
Optics - The physics of the eye (Accommodation)
14:00
Myopia & Hypermetropia
9:35
Просмотров 20 тыс.
Ray Diagrams - Lenses
7:26
Просмотров 399 тыс.