Thread: Do old -style opticians cut lenses on premises [OT]
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Andrew Gabriel Andrew Gabriel is offline
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Default Do old -style opticians cut lenses on premises [OT]
In article ,
"Graybags" writes:
Plastic lenses reach up to 1.74 refractive index at the moment. Glass can be
obtained in 1.9 - certainly not anywhere near twice as thin.

Ah, what you really want are diamond lenses, at 2.42... ;-)

There's also Synthetic Moissanite at 2.69, but I don't know
how large a piece can be manufacturered.

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Andrew Gabriel
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