JACKSON CROSS CYLINDER | IN HINDI | JCC | procedure of JCC

This video is about JCC (Jackson cross cylinder) which covers
Optics of JCC or how is it made?
Uses of JCC
verification of cylindrical axis
Verification of cylindrical power
Determination of the presence of astigmatism

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Видео JACKSON CROSS CYLINDER | IN HINDI | JCC | procedure of JCC канала Eye Spy