Term
the power drum of a lensometer reads +2.25 for the sphere and -1.00 for the cylinder and the axis is 45
what is the cylinder of this lens |
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Definition
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Term
| the instrument to check the vertex distance is a |
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Definition
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Term
| a presbyopic golfer wants glasses only for golf ,what would you recommed |
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Definition
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Term
| for a high minus RX which of the following will improve the appearance |
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Definition
high index plastic
a frame with a small ED
less decentration |
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Term
RX is OD -4.50 4BD
OS -5.00 2BO
which of the following is a usual way of ordering the lenses |
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Definition
OD -4.50 2BD 1BO
OS -5.00 2BU 1BO |
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Term
| which of the following is recommended for children's bridge |
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Definition
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Term
| a frame fits perfectly on your patient .the temple bridge and pads are fine but the frame sits high ,you should select a frame with a bridge that is |
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Definition
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Term
| which lens design would you recommend for high a plus RX |
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Definition
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Term
RX OD +10.00 -1.00 X180
OS BALANCE
what is the best lens for the left lenes if its a bal lens |
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Definition
OS +9.50
RX will be
OD +10.00 -1.00 X180
OS +9.50 SPH
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Term
RX OU +11.00 -1.00 X90
add 3.00 this is an aphakic patient ,he wants separate sunglasses just for golf .what would you recommend |
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Definition
| just a SV lens and tell him to slide the glasses down the nose to see near |
|
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Term
| standard trifocals have an intermediate the is |
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Definition
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Term
if the RX is ordered as +3.50 -1.00X90 and received
+3.00-1.00X90 what would the optician do |
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Definition
| send it back to the lab (the power is off to much it not even with in tolerance |
|
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Term
RX OU -0.75 +1.00X180 ADD2.00
PPD 64/60 patient needs SV near glasses
what would you order |
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Definition
| OU +1.25 +1.00X180 PPD 60 |
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Term
| how long should a prescription of a patient be kept |
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Definition
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Term
| the pantoscopic tilt can be increased up to |
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Definition
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Term
| the foucal length of a 2.00D lens in 20" what happens to the focal length if the power doubles |
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Definition
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Term
| which of the following frame design would you recommend to a patient with a flat and low bridge |
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Definition
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Term
| magnesium fluoride is a chemical used for |
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Definition
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Term
a patient with an RX of +10.00 RVD OF 16MM chooses a frame with FVD of 11MM
what would the rx be |
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Definition
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Term
in what meridian this the minimum power
plano -3.00X45
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Definition
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Term
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Definition
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Term
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Definition
|
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Term
| what part of the eye is responsible eye is responsible for 80% of the light refraction |
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Definition
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Term
| the power of a bifocal add is the difference between |
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Definition
| the front vertex measurement of distance and near |
|
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Term
| in the system of lens measurement the B represents |
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Definition
|
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Term
| a plus lens moved downward from the primary position results |
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Definition
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|
Term
| tempering a lens by heat results in a lens being |
|
Definition
| more resistance to impact |
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Term
| a polariscope is used to check inserted lenses for |
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Definition
|
|
Term
an uncoated glass lens tinted grey #3 with a RX of
-5.00D will be |
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Definition
|
|
Term
|
Definition
| an area of retinal vision loss |
|
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Term
| in normal binocular vision accommodation is always asasociated with |
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Definition
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Term
| besides accommodation the crystalline lens |
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Definition
| filters ultraviolet radiation |
|
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Term
| images formed on the retina are transmitted to the brain by the |
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Definition
|
|
Term
| an average human eye is ? long |
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Definition
|
|
Term
| the ability to maintain single binocular vision with both eyes is called |
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Definition
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Term
| when aphakic lenses are tiltesd too much pantoscopically .what can be expected |
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Definition
| an error of refactive power is induced |
|
|
Term
| to widen the distance between the pads of a frame or mounting bend the pad arms |
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Definition
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Term
| a person wearing bifocal lenses having difficulty accommodating could most often helping by adding --- to the RX |
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Definition
|
|
Term
| when the right temple is angled down ,this adjustment will |
|
Definition
| raise the right side of the front |
|
|
Term
| if the right temple is angled out this adjustment will |
|
Definition
| bring the right side of the front toward right eye |
|
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Term
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Definition
| the point of no refraction on a lens |
|
|
Term
| what is the geometrical center |
|
Definition
| the point where A and B intersect |
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|
Term
| the A measurement of a frame is |
|
Definition
| the lonest horizontal measurement |
|
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Term
|
Definition
| the least distance between lenses |
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Term
| a prism deviate the light toward its |
|
Definition
| deviate the light toward its base |
|
|
Term
| the ----- of a frame is twice the longest radius of that frame |
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Definition
|
|
Term
prisms are used to correct strabismus.strabismus.menas
muscle imblance , there are 2 types of strabismus :PHORIA &TROPIA
PHORIA: means tendency of the eyes to deviate
TROPIA:means obvious deviation of the eye
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Definition
eye turns out is called EXOPHRIA/TROPIA
need (base in)
eye turns in is called ESOPHORIA/TROPIA
need (base out)
eye turns up is called HYPERPHORIA/TROPIA
need (base down )
eye turns down is called HYPOPHORIA /TROPIA
need (base up) |
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Term
| prism that ADD and prism that CANCEL |
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Definition
base up and base down ADD
base up and base up CANCEL
base down and base down CANCEL
base in and base out CANCEL
base in and base in ADD
base out and base out ADD |
|
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Term
| to induce prism in a minus lens move the lens to opposite direction |
|
Definition
to induce base in /move out
to induce base out / move in
to induce base up /move down
to induce base down /move up
|
|
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Term
| to induce prism in a plus lens move the lens to the same direction |
|
Definition
to induce base in /move in
to induce base out /move out
to induce base up /move up
to induce base down /down |
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Term
| which of the following combination of prisms are not a canceling situation |
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Definition
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|
Term
| where will the image appear too be in a prism |
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Definition
|
|
Term
| the diopter power of a lens is related to |
|
Definition
the radius of each surface
the optical material
the thickness of the lens
ALL OF THE ABOVE |
|
|
Term
| as the focal length of a lens increases the diopter power |
|
Definition
|
|
Term
| the smaller the radius the |
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Definition
|
|
Term
| as refractive index increases the thickness of the lens |
|
Definition
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|
Term
which of the following statement regarding CR-39 lenses
is not correct |
|
Definition
| they are thinner than glass lenses |
|
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Term
| which of the following statement regarding polycarbonate lenses is not correct |
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Definition
|
|
Term
| higher the specific gravity of material |
|
Definition
|
|
Term
| lower the abbe number of a material |
|
Definition
| greater the chromatic aberration or dispersion |
|
|
Term
| which of the following lens material has the highest abbe number |
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Definition
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|
Term
| three identically shaped meniscus plus lenses are made from three different materials .which lens will have the most power |
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Definition
|
|
Term
| higher the refractive index |
|
Definition
| the better the absorption of UV radiation |
|
|
Term
| the height from which the steel ball used for drop ball test is dropped is |
|
Definition
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|
Term
| magnification and minification of a lens can be altered by which of the following |
|
Definition
| base curve,vertex distance,lens thickness,power and index |
|
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Term
| round segment should be ordered --- then ft seg |
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Definition
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|
Term
| if a person keeps his head back ,his bifocal should be set slightly --- than normal |
|
Definition
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|
Term
| a piano player asks his optician for a pair of glasses to see the notes that are an arm length away .what should the optician recommend |
|
Definition
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|
Term
| above musician wants another pair for when he plays in an orchestra what you recommend |
|
Definition
| bifocal with intermediate rx in the seg |
|
|
Term
| what trifocals is for a computer programmer |
|
Definition
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|
Term
| which of the following multifocal lens styles is not an occupational lens |
|
Definition
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|
Term
| the measurement need to calculate segment drop is |
|
Definition
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|
Term
| which PD do we use to calculate horizontal decentration for bifocal |
|
Definition
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|
Term
| the lens clock may also be used to check |
|
Definition
|
|
Term
| the best was to heat nylon frames is by useing |
|
Definition
|
|
Term
| what is physiological blind spot |
|
Definition
| it is when image is formed on the optic disc |
|
|
Term
| how much is average convergence for eyes for reading |
|
Definition
|
|
Term
|
Definition
| retina but we really see with are brain |
|
|
Term
| how the CR-39 lenses should be cleaned |
|
Definition
| wash them with soap and water and wipe them with clean cloths |
|
|
Term
| the type of patient often bothered by specular images is |
|
Definition
|
|
Term
| after the patient has placed the order the optician must |
|
Definition
| coordinate all elements of the order |
|
|
Term
| within th efirst few minutes of contact with new patient you must |
|
Definition
| generate a feeling of confidence in the patient |
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