woensdag 30 januari 2013

Extreme cylinder (3)



Again it's the "Judy" glasses with the extreme cylinder in the left lens: -4.00; c+9.00 o.
The effect of the cylinder can be seen in the tilted image of the background.
The right lens is +2.00; c+0.50 h. A very common Rx.
The "h" stands for "horizontal", indicating that the axis of the cylinder is around 90 degrees.

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