Відео

It seems to me that in order to do the reversal test, a -0.25 cylinder at 100 deg (perpendicular to the original sharpest line) should be added, instead of a -0.25 sphere. Because the former would be an over-correction, causing the anterior focal line to go further back, becoming the new posterior focal line, thus causing a reversal, while the latter would just move the entire pencil closer to the retina, therefore shouldn't cause a reversal. Am I missing something?

I use the milling machine for my Optical. Has anyone found a bit to cut Polycarbonate?

My exam is in 2 hrs and I thought to open youtube so I can understand better and I just want to thank you❤❤❤ because how the hell is it this easy and I was struggling all year

Great video ! I am interesting with it! Brought memories back of my short term training in Addis Ababa SOT PLC

Very good explanation

I'm back today to greet you Sir

Thank you so much. I need you in my life. You explain this so well

Thank you so much sir🙏 you help me so much 🩷

Very nice job. Thanks

Good day, where's your office situated in Lagos Nigeria. I will like to buy some of this equipment

Hi thanks for this. Is there anyway, for bifocals where there is reading lens, which numbers to add that to in order to get the reading glasses prescription? For example, with a distance prescription of -0.50, +2.75, 017 (vs it's transposition +2.25, -2.75, 107) , which transposition do I add this 1.75 number to in order to get the reading lens spherical prescription or does it matter?

Best explanation!!!! Thank you a million 🙏🏽💫💫

I am an Egyptian optical technician. I can maintain all glasses and of course install them. I can even use a vision detector. I want to travel for work. Is there anyone who can help me?

Thank you sir

Please don't ever take this video down. I link to it in my optical classes when we cover different types of edgers. We have a mobile health lab at our college that allows us to give eye exams and glasses to those in need (Project Sight at Durham Tech in Durham, NC), and this video serves to educate our students about the global need for people with their skills to help the greater community. It's a shame Ian's life was cut short, but his legacy still lives on. ❤

Good afternoon sir Im guljar ali khan from India I sc your video sir I work this machine samthing is wrong this machine for, R.....eye.. pd.. 32 L.....eye ..pf ...32 Now R eye pd wrong 2 mm pd wrong sir

Thanks sir I am Indian

Good... Very good wants more such video.... But sound should be next video.... Salute

No clear sound

I need four job i am a lens fitting Tecnicen

❤❤❤❤ from Bangladesh 💞💞💞

my left ear enjoyed this

thanks a lot

thank you so much

Thank you sir It was really helpful♡

I can't understand your English language...it's better to have subtitle. Or written Sentence

Thanks for your help video

principle: Find BVS with a subjective or ret test. bring 2nd FL to ret with pos. bring 1st FL to ret with neg. test: occlude one eye. use BVS fo estimate the cyl power, add half the pos cyl to get 2nd FL onto ret. adjust the axis. (at 90* to test chart axis). add 0.5 sph plus as a check for later. now onto blocks. need to add minus cyl until blocks are equally blurred. the check: remove the 0.5 sph and there should be a reversal of block clarity.

Sir , please make vedios on slit lamp

Very useful video. In this example, the sph is a minus(-5.00), so every time you increase cylinder power by -0.50, you reduce sph power by 0.25. What about if the sph power is +5.00, when you increasing the cylinder by 0.25, will you decrease sph to +4.75 or increase it to +5.25? Confuses me alittle bit but I understand the technique

Thank you

You’re a great teacher sir

Thank you Ian, I now do my own refraction, using my own test lenses. Starting at 20/60, or -0.75 diopters, I got a change of +1 diopter, to 20/20, at measured +0.25 diopters. In other words, I got myself out of myopia. Thank you for helping me achieve this scientific result!

I love how you teach ,it's amazing Please can you share a complete subjective refraction. Will be greatful.

yaal nice but this matchine how to put grove .or you use hand adger

this video is old but i want to ask anyway, so what if adding the -0.25 lens does make it better for the patient? Do we keep it?

Is it normal to have an astigmatic vision in ajustment period with my glasses? I have astigmatism

Nice ❤❤

Hi

Great video, brought memories back of my apprenticeship in a RX workshop 👍

I love you Mr, thank you

thank you so much for the explanation! very clear, straight to the point yet very detailed

Thank you im youssef in morroco cherch opperacitton

3:49in rule 3,simply add both cyl & sph power algebraically to get new sphere power.

Someone who knows what they are talking about.

Great tutorial! Your example featured a + sphere example. In myopic minus patients, the same increase in cyl power (once best vision sphere has been determined) would follow the same rule for compensating sphere power with higher cyl power but in this case decrease the sphere by 1/2 of the cyl (by 0.75 as in your example)? Or does this only apply to plus powers? So for a -3.50 best sphere, every 0.50 diopter increase in the required cyl would drop the sphere by 0.25? If not the case, can you please explain why?

Hallo, thank you for your videos 🥰

Thanks sir

Bro my right eye cylinder number is -0.50 and axis is 170 degree if i apply 180 degree what will be the damage

lovely!