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OCPP Volume 3: Questions & Accurate Answers (Pass!)
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OCPP Volume 3: Questions & Accurate Answers (Pass!)
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OCPP Volume 3: Questions & Accurate Answers (Pass!)What federal agency is charged with regulating safety practices in the
workplace? Right Ans - OSHA
What federal agency is charged with protecting human health and the
environment? Right Ans - EPA
What is the name of the document provided to workers when working with a
substance Right Ans - SDS
Is an SDS required for all hazardous materials Right Ans - Yes
Which is the proper method of disposing of optical laboratory waste Right
Ans - Check with your local authorities regarding how to dispose of each
waste and keep it documented
First lensometer reading is -0.50 and the second reading is -2.75 with axis
023. What is the rx? Right Ans - -0.50-2.25x023
First lensometer reading is +2.00 and second reading is +1.00 with axis 045.
What is the rx? Right Ans - +2.00-1.00x045
The term lensometer is a generic term. The correct name for the instrument is
Right Ans - Focimeter
Rather than actually reading the power of the lenses, what are we really
doing? Right Ans - We are neutralizing the power of the lens by measuring
the focal length. The instrument converts focal length to dioptric power
When viewing through the eyepiece, as you move a lens to the right the image
also goes to the right, what type of lens is it? Right Ans - Minus power-with
motion
When neutralizing a pair of eyewear in a lensometer, the first thing you
should do is? Right Ans - Focus the eyepiece. With the instrument off, place
a white piece of paper on the lens stop. Rotate the eyepiece quite a bit to the
left and then slowly rotate to the right. When the mires are clear, stop
, The image in the lensometer has both sphere and cylinder lines in focus...
Right Ans - This illustrates a sphere power
The image in the lensometer has only the sphere lines in focus but not the
cylinder Right Ans - This indicates a sphero/cylindrical power
The image in the lensometer has both sphere and cylinder lines in focus but
are off center. This represents? Right Ans - It is a spherical power lens.
Because the lines are off center and above the center we can read the amount
of prism
If you are neutralizing a lens and get the sphere lines clear at +3.00 at 180 and
the cylinder lines clear at +1.00, what is the power of the lens? Right Ans -
+3.00-2.00x180
If you are neutralizing a lens and get the sphere lines clear at +2.50 at 45
degrees and the cylinder comes in clear at -1.00 what is the power of the lens?
Right Ans - +2.50-3.50x045
If you are neutralizing a pair of single vision glasses and you center the mites
on the OD and when you move to the OS the target is below center, what
should you do? Right Ans - Identify which lens is stronger and center that
one first, then switch to the opposite lens to determine how much prism is in
the lens
If you are neutralizing a single vision lens and the first image comes in clear at
-4.50 at 90 and the second one comes in at -5.50 what is the power of the lens?
Right Ans - -4.50-1.00x090
If you are neutralizing a lens and the first image comes in clear at -4.50 at 90
and the second image comes in clear at -3.50 what is the power of the lens?
Right Ans - -4.50+1.00x090
Explain how to neutralize the power of a multifocal Right Ans - Neutralize
the distance just as you would for single vision. To determine the add power
turn the lens around and read the sphere power. Then move to the segment
and read the sphere power. The difference between the two is the add power
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