[Jewelry making - Article 00171] - Re: [Orchid] Ergonomics

[Gerald]

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Noel, and all on Orchid !

    The stronger the lens#7, or even a #10 lens for an Opti-Visor will
    mean the closer you will be 'bending' over towards your work. Hence,
    neck-problems! Do not take this route. I use only a #5 lens and in
    collaboration with a 10 power hand loupe, anything stronger is
    totally over-kill ! 

    For jewellers, they can use a # 3, if they get too close with a
    torch..."woops!" so I have been using only a #5 all of my 46 setting
    years and counting! Number #7 reduces the focal distance and again
    gives you some eye strain. "Eye-Strain" means that your eyes will be
    turning inward constantly and severe strain will ensue..headaches, no
    relaxing of the eye muscles.Why do this? 

    Eye distance for a #10 lens is 3 inches, number #7 is 5 inches away
    from the bench peg. with a #5 your focusing range is less demanding,
    thus leading to a vertical body position..

Gerry!

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