5 doctors weighed in:
How can the opticians find out the eye power by looking at old spectacles?
5 doctors weighed in

Dr. William Dieck
Ophthalmology
1 doctor agrees
In brief: Neutralization
A lensometer is a device that reads the power in a lens by meutrilizing its power.

In brief: Neutralization
A lensometer is a device that reads the power in a lens by meutrilizing its power.
Dr. William Dieck
Dr. William Dieck
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Dr. Bud Kurwa
Ophthalmology
1 doctor agrees
In brief: Lensometer
This is a machine that can read the prescription of the lenses in the spectacle.

In brief: Lensometer
This is a machine that can read the prescription of the lenses in the spectacle.
Dr. Bud Kurwa
Dr. Bud Kurwa
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Dr. Richard Bensinger
Ophthalmology
In brief: Eyeglass power
While an optician can find the power to make eyeglasses from by copying an old prescription, this number may not be accurate and it would be useful to update your value by having an ophthalmologist redo your refraction before you spend money on eyeglasses.

In brief: Eyeglass power
While an optician can find the power to make eyeglasses from by copying an old prescription, this number may not be accurate and it would be useful to update your value by having an ophthalmologist redo your refraction before you spend money on eyeglasses.
Dr. Richard Bensinger
Dr. Richard Bensinger
Thank
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Dr. William Forsythe
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