woensdag 30 januari 2013

Extreme cylinder (1)

Here is a lone crystal veil without a lady. The glasses are called "Judy" and were acquired in Germany.
This and the following photos are posted by request.
The left lens has a highly unusual Rx: -4.00; c+9.00 o.
From this vantage point it may look like a prismatic correction but it's not that. It's the effect of the ultra strong cylinder.
The axis is indicated with the "o", meaning either around 45 or around 135. I measure the strength of the lenses with a set of trial lenses so the axis of a cylinder cannot be given precisely.

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