Jacksons cross Cylinder

Simple video demonstrating the use of jacksons cross cylinder to subjectively correct astigmatism, Small mistake - in axis refinement which is done first, i have used the cross cylinder along the axis of the cross cylinders. instead it should be 45 degrees to the axis of the cross cylinder.
Promise to change it when i have the time. exams NOW. PRAY FOR ME.
Lions Eye hospital

Category:

Education

Tags:

• Karan
• Lions
• Jacksons

[otissumnerbrown]

Thanks for this video. For the most part and astigmatic measurement is not required for 20/25 to 20/20 vision. It should be optional as a choice for the person himself if he reads the 20/20 line through a spherical minus lens -- in my opinion.

[formceo]

axis process is wrong people, but check the description. The guy admits that. 

[ULISES814]

inicia con -2.50 cyl y finaliza con -2.50 cyl ???? unicamente afino el cyl ... entonces para que se lo retira????

[fece64]

I think, the whole process is wrong

[lol7070]

@lol8080 yes i think that way too >.<

[lol8080]

i think it should be power of the cylinder

[oogamous]

I think the axis refined part is wrong.