Jackson's Cross Cylinder | JCC | Refraction

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Optics of jackson cross cylinder | jackson cross cylinder power | how to use jackson cross cylinder | jackson cross cylinder technique |jackson cross cylinder definition | spherical equivalent of jackson cross cylinder | jackson cross cylinder principle | jackson cross cylinder optics | refraction jackson cross cylinder | properties of jackson cross cylinder
Cross cylinder examination (otherwise known as Jackson's cross cylinder) is an examination used for the final fine-tuning of the axis and strength of astigmatism after its determination through retinoscopy, stellate cycle or automatic refractometry.
#optometryacademy #jackson #jcc #akleshkumar #optometry #cylinder #axis

Опубликовано:

29 мар 2019

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Комментарии : 91

@sundarsannamalaisamy5622 3 года назад

Nice explanation..its very useful for me ❤️

@OptometryAcademy 3 года назад

Thank you 😊

@mdafzalhussain5115 5 лет назад

This Video is very useful for me, but background music irritating

@VineetShukla78 4 года назад

Md Afzal Hussain u should low the volume..no option dear..

@bellaboo7932 5 лет назад

I'm a student optician in Canada, my final exam is next week - this is so helpful! Thanks!

@OptometryAcademy 5 лет назад

Best of luck :)

@khaliltaclibon3507 3 года назад

I'm a student of optometry from Philippines, This vid is useful to me, So I can perfrom this from my patient. In clinician after lockdown. Thank you!!!

@OptometryAcademy 3 года назад

Thank you 😊

@RameshKumar-cw1mm 5 лет назад

Now after seeing this . I can use jcc. Thank you for this :)

@murtazasyed9694 4 года назад

Plz don't put background music it is disturbing

@OptometryAcademy 4 года назад

Ok sir

@raviarcot3145 3 года назад

Our teachers asked us questions but never taught us

@mickydkhar3769 2 года назад

Yes bro...

@HoboCombat 4 года назад

thank you for this video, was remembering how to find out the axis using the JCC

@OptometryAcademy 4 года назад

Thank you sir ☺️

@jeevithakuppuswamy 4 года назад

Now only I understand JCC... Thanks a lot 😇

@OptometryAcademy 4 года назад

Thank you ☺️

@rishikalakshminarayana8199 5 лет назад

Very nicely illustrated!

@OptometryAcademy 5 лет назад

Thank you :)

@krishnaprasad3883 3 года назад

Kewal trial box se eye test kar eye power nikalne ka video banayen

@love78646 3 года назад

Really very finally explained...thnku

@OptometryAcademy 3 года назад

Thank you so much 😊

@ayasworld5450 2 года назад

During axis refinement in case of minus cylinder in trial frame are we rotating the cyl towards the minus cyl axis of jcc or minus cylinder meridian of jcc???

@OptometryAcademy 2 года назад

Towards minus mark of JCC

@amalrocks4565 5 лет назад

very useful..am from Kerala...

@OptometryAcademy 5 лет назад

Thank you :)

@VineetShukla78 4 года назад

Good explained

@gowsikam1153 3 года назад

Well explained....thank you alot

@OptometryAcademy 3 года назад

Thank you 😊

@yacoubhijazeen9934 3 года назад

no need for the music, I already have an irritating instructor. thanks

@rupeshvarshney4321 5 лет назад

Sir aap please aisi hi video banaya kare Kyoki Optometry ka kahi par lecturer nahi Milta hai or student ko Sahi knowledge nahi mil pati hai please sir and thanks

@OptometryAcademy 5 лет назад

Thank you :)

@OptometryAcademy 5 лет назад

Uploaded one more videos on bagolini glasses. :)

@rupeshvarshney4321 5 лет назад

Thanks please Placido Disc par video banaye

@OptometryAcademy 5 лет назад

@sachchavhan3494 5 лет назад

Thnx for the video

@normadicn5700 4 года назад

Terrible music but has upvotes so I would watch. Must have useful information.🙄 Edit- OMG I know understand Jackson's Cross Cylinder. Super Thanks 🥳

@sydanny4628 5 лет назад

I'm new to refraction part. Thank you, your content is very helpful. i have question though, can i use 0.25 JCC to refine astigmatism power as well ?

@OptometryAcademy 5 лет назад

Thank you for your comment. Yes , we can use 0.25 jcc to refine astigmatism power.it is used when cylinder power is less than or equal to 1D .

@snehamathew462 3 года назад

Very useful video

@OptometryAcademy 3 года назад

Thank you 😊

@doctorakhtaramin2487 Год назад

wow

@VineetShukla78 4 года назад

Please explain what about if +2 is there..???

@OptometryAcademy 4 года назад

Then we rotate the trial frame's cylinder towards green side

@sajlamalayil3336 4 года назад

Hi good presentation ,but the music is disturbing

@harshitasaxena8390 5 лет назад

Very helpful video....Thank you for this..

@ahmedalshamy7226 3 года назад

Great ♥️

@OptometryAcademy 3 года назад

Thank you 😊

@praveenb1672 3 года назад

Well explained sir .but I have one doubt sir, Should we rotate only the red line side and why not rotates the green line side

@auxikath3982 3 года назад

Since the prescription which we got after objective refraction is minus (-2DC ),we r rotating it in red line side(minus). If the prescription is plus, we should rotate it through the green line side(plus).Hope it's useful.

@praveenb1672 3 года назад

@@auxikath3982 thank u so much

@rohanbanerjee9852 2 года назад

Add minus if red is clear .....and when green is clear add plus cyl power ....but it's opposite in duo Chrome test

@optomak2356 4 года назад

👌😊

@chetandevanand9860 4 года назад

Hi ,very helpful video Plz explain ...first position and second position?

@OptometryAcademy 4 года назад

When you place the jcc in front of patient eye. That is your first position. And when flip the jcc, that is your second position.

@sidoptom Год назад

When cylinder is increased from -2.00 to -2.50, we should add +0.25 sph to maintain same spherical equivalent which is -1.00

@ivanseah8734 4 года назад

useful but srsly, the music - how do you study with this sort of music?!

@OptometryAcademy 4 года назад

😔

@albustanvlog9951 3 года назад

Avoid wreckers music..pls

@OptometryAcademy 3 года назад

Ok.

@ayasworld5450 2 года назад

What is the difference between UK and INDIAN jcc

@likhilkaratt125 2 года назад

In UK JCC Red indicate plus power and Green or White indicate minus power. But in Indian JCC Red indicate minus power and green indicate plus power

@ashanhaththasinghe8766 2 года назад

@@likhilkaratt125 👍👍

@Realscience00 3 года назад

Sir ji eye disease par video banaye and treatment bhi

@OptometryAcademy 3 года назад

Ok ji😊

@Realscience00 3 года назад

@@OptometryAcademy tq

@optometristforyou 4 года назад

Why I done the astigmatism power find out with 0.50 jcc ......?why

@OptometryAcademy 4 года назад

If cylinder power is less than or equal to 1 Dioptre, then we use +-0.25D JCC for axis and power refinement. If cylinder power is more than 1D , then we use 0.25 JCC for axis refinement and 0.50 D for power refinement.

@optometristforyou 4 года назад

You have any written book and notes so plz share with me it's my whatsapp no 7248668238 Actully mene kabhi nai suna hai ki 1 diopter se jyda cylinder power ho to 0.50 D JCC use karenge so plz share with me😊

@girirajmanna3968 3 года назад

Give me the source please

@nabeelhanif948 4 года назад

Malayalam il explain cheyumoo please

@OptometryAcademy 4 года назад

I can explain in English and Hindi only ,🙂

@girirajmanna3968 3 года назад

Have a big doubt

@girirajmanna3968 3 года назад

1.For every -0.50 diopter of cylinder power increased, add + 0.25 diopter to the sphere. 2.For every -0.50 diopter of cylinder power remove, remove +0.25 diopter from the sphere

@user-qx5cn1si1q 2 года назад

@Giriraj Manna do you leave these added +0.25 diopters as part of the prescription, or do you remove them at the end of he process?

@joyeshaa Год назад

@@user-qx5cn1si1q definitely leave them!!

@user-qx5cn1si1q Год назад

@@joyeshaa needed that information about half a year ago for the exams, but thank you anyway 😅

@sonunegioptom2833 4 года назад

But some jcc it's totally opposite, during axis refinement, rotate the lens towards the green mark in minus lens.

@OptometryAcademy 4 года назад

Yes. It depends on company how they mark color coding

@Laura-sg9ex 2 года назад

I don't mind the music, it kept me more alert. If people don't like, they can simply mute. Thanks for the video.

@OptometryAcademy 2 года назад

Thank you 😊

@minghei2010 5 лет назад

走ることが

@minghei2010 5 лет назад

端数

@Scaryseat 3 года назад

This music is so irritating

@OptometryAcademy 3 года назад

Ok. Next time I will not put this irritating sound 😊

@Scaryseat 3 года назад

@@OptometryAcademy 😊

@minghei2010 5 лет назад

有一個老太太跟我說話我跟他說結婚的對象的配對條件她給我一個韭菜煎餃跟紅茶 THERE IS AN OLD LADY SHE talked with me because i told her about my research about the conditions of matching partner and she gave me a Chives fried Dumplings and a red tea

@minghei2010 5 лет назад

はｚひる

@minghei2010 5 лет назад

走らす