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Trial Lens Sets
and Trial Frames
Chronological History
1900 - Trial Lens sets
AO produced a trial lens design by Charles Prentice. This set was composed of biconcave minus lenses of true curve out the convex plus lenses were designed to neutralize the minus lenses. This meant that the lenses were almost exactly true vertex refractions or effective power. The first lenses so made. This principle is still used in our trial lens sets. Only the rings & cases have been updated.
1900 - Trial Frames
Used in conjunction with trial lenses.
Trial Lens Sets |
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Trial Lens sets Plus & Minus
Cyl |
Trial Lens Plus & Minus Cyl |
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Trial Frames |
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Universal Trial Frames |
Classic Trial Frames |
Half Trial frames |
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Universal Trial Frames |
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Done with Trial Lens Sets ? Return to the Optivision2020 home.
Click here for our Used Equipment Special Sale!
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We
accept all major credit cards  |
305-731-2020 * Fax: 1-866-615-2426
Optivision2020, Inc.
3026 NW 79 AVE.
Miami, Florida 33122
