@Interactive Biology Hey I really appreciate your work. I've gained a lot from them and thanks for that. Btw I wanted to mention that @ 4:39, you've incorrectly said that rods and cones are 'pigments'. They are cells that contain pigments and not pigments themselves... I request you to annotate or edit the video so that no one else points this out to you again... Once again thanks for your videos...

Thank lord that I watched this vid right before my test and it showed up on one of the questions!!!!!!!!!!!!! Thank you thank you thank you!!!!!!!!!

The use of that picture kept my interest. Solid video!

Thanks very much. love the videos. Please keep them coming. You seem to be following my behavioral neuroscience textbook perfectly. These videos are a perfect compliment to reading the book and going to lecture. Thanks again.

Learning and understanding knowledge about the mechanisms of optical vision is valuable. Thank you for the video.

@InteractiveBiology

2 жыл бұрын

You’re very much welcome

THANK U THANK U THANK U ....I READ A MILLION TIMES IN D BOOKS BUT THE HEART, EAR AND EYES NEVER MADE MUCH SENSE TO ME....BUT YO VIDEOS DID!!!

@soneelita

10 жыл бұрын

THNX CHAN

This is so incredibly helpful. Thank you so much.

@rainbowmilktea Glad you are finding the videos helpful. I'm going according to a sequence, so I'm not sure when I'd be dealing with that. I know that it won't be soon, because I'm working on getting through all of my physiology content. Not sure when I'll get to development, but it will come at some point in the future. Thank you so much for your input though. Hope you continue to find value in the many more videos that are coming :)

It's really focusing the light to shoot it at the fovea, where more cones are located. These recognize color and light during the day best. It's kind of like that picture where a white line comes into a triangle and bends out in a rainbow. Different colors are different wavelengths and frequencies of light, so they bend differently. Somehow the lens is shaped just so that it bends all of the light entering the pupil into the concentrated area of the retina: the fovea. hope this helps!

Hi thanks for your videos, they're really helpful (: would you be able to do up a video to show the embryological development of the eyes, in particular the lens? cheers!

Thank you. It's been very helpful :)

do you have any videos about the endocrine system and the hormones of the body?

A few corrections: The lens is convex not concave, i.e. it is shaped a bit like an oval. The ciliary muscle is like a circular band around the lens and is attached to the lens by fibres called zonular fibres. When the ciliary muscle contracts, these fibres loosen. Think about it like a tube of muscle with a hole in the middle - contraction causes the hole to get smaller. When the Zonular fibres loosen the lens becomes more spherical. This is what happens when we see things up close.

this helps for my psych class

senang bisa menemukan video ini. sangat memabntu. sukses untuk kalian!! n_n

@jimmyt1222 That is correct. I should have said photoreceptors there. In the Fovea is where you have the most cones. However, the pigments are in the photoreceptors, so you will also have more pigment indirectly. Thanks for asking.

This is great! i love it!!!!

@afrprincess07 Unfortunately, Leslie is too busy at the moment. He won't be able to answer all of your inquiries. He has many to work on at the moment. So stay tuned for more Biology videos coming soon!

The lens of our eye is concave, because of it shape it bends the light to focus on the fovea. When the light cant reach to the fovea, the cilliary muscles that is attached to the lens will pull the lens to make in thinner, causing the light to fall on the fovea. However, if the light pass over the fovea, the cilliary muscles will relax and the lens will become thicker, causing the light to fall onto the right place.=D I hope this helps to answer ur question!

thanksssssss, your video was really helpful to me (:

"It is He who has produced you and made for you hearing and vision and hearts [i.e., intellect]; little are you grateful." -- Quran 67:23

@afrprincess07 the lens causes the change of direction of light (refraction). So if the lens is quite thin, the light doesnt pass through much of the lens and so it would not get refracted as much. This is usually the case if you are looking at things which are far from you. However if you need to focus on, say a book, you effectively need to see "bigger" items (i.e. a diagram on a book as opposed to a cloud in the skywhich appears smaller). So to accomodate for this closer image, the lens ...

thanks for helping me on my quiz!!

I'm an optician studying for my ABO certification exam and in the anatomy of the eye, you really opened my eyes on why my lenses are needed. Thank you very much, I found your illustration and explanation extremely helpful.

thanks , this video helpe me to understand information about retina

question? im still confused on how the lens bends the light to focus on the retina? why is it that when the muscles expand the lens, the light is able to be focused on the retina as opposed to when the muscles constrict and therefore buldges the lens? im not sure if my question makes sense??

@CesarCordova

6 жыл бұрын

afrprincess07 when light passes through a lens it changes directions and focuses, like sunlight through a magnifying lens.

Thank u a million times

When you say "pigment", do you mean "photoreceptor"? @6:10

if you still didnt find out just look up concave and convex lenses. They are different shapes and bend light differently. When the lens inside the eye is as flat and stretched as it can be. it doesn't really bend the light. Your window would be like that. light goes through and is not effected. When the lens is more round it starts effecting the light. (much like glasses, magnifying glasses.

thaksssssss, this video help me a lot

THANKS FOR HELPING

@afrprincess07 ... would bulge to make the light refract more. This way, you can distinguish things in greater detail that are closer to you :-)

thank you

thanks bro

thnx really for your amazing videos plaz make a video about skeleton

Want a nice trick to see in the dark for a couple of seconds no matter how dark it is? 1) Close your eyes 2) Take a deep breath, whilst taking this deep breath imagine sucking in all the darkness in between your eyebrows. 3) Release the air, whilst releasing the air imagine blowing out light into whatever room you're in. 4) Open your eyes. If you did it right the you should be able to see clearly for a couple of seconds. I don't know how it works but it does.

Let's just say you are walking on campus, and you see one hell of a PAWG. You think DAMN!

@jimmyt1222 I'm glad you are loving the videos, and good to know they go along with your textbook well. I will definitely keep em coming. Just make sure you keep coming back to check them out ;)

@hcube3000 thanku:)

thx

Cones and Rods are not "pigments". They are photoreceptor cells.

Useful, but thought the cornea does 70% of the focusing

whre a u frm leslie u da best

hey that beautiful lady is me !!

Take a shot every time he says attractive young lady

and skin lesson

#ConManSwag

That girl sure sounds attractive :D

06:32 as straight as drawn with a ruler

we learn this in high school in Trinidad and tobago...

i am here after side effects from lasik laser surgery :(

Human iris does not have blue nor green pigments.. ;)

who is the hot girl ? :)

i like it but you move veeeeeeeery sloooooowly. you need to speak quicker to keep our interest