How I found glaring errors in Einstein's calculations (2009)

Re:How I found glaring errors in Einstein's calculations (2009) by seanhandley on Thursday May 14, 2015 @05:50AM (#9544173)

Google Define:

optician ɒpˈtɪʃ(ə)n/Submit nounBRITISH a person qualified to prescribe and dispense glasses and contact lenses, and to detect eye diseases ( ophthalmic optician ) or to make and supply glasses and contact lenses ( dispensing optician ). US a dispensing optician.

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Re:How I found glaring errors in Einstein's calculations (2009) by MichaelCrawford on Thursday May 14, 2015 @06:11AM (#9544224)

In my understanding, a dispensing optician is a different thing than either an optometrist or an opthalmologist.

There are some good reasons one requires a professional prescription from eyeglasses; if you wear the wrong lenses for any length of time, it can screw up your eyesight. Although the effect is commonly temporary it _can_ be debilitating.

So a dispensing optician would be someone who sells eyeglasses, given a prescription from an optometrist or an opthalmologist.

It is quite definitely the case that opticians make telescopes. From time to time I call myself an astronomical optician. I don't grind glass much anymore but I am quite good at making astronomical telescope optics.

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