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WorksheetsDispensing 1
Total questions: 25
Worksheet time: 25mins
What is the material been used in manufacturing lens before century?
Stone
Glass
Mirror
water
Choose the common shape of the ophthalmic lens in 13th century.
Triangle
Square
Round
Dome
In which year the ophthalmic lens with rim was invented?
In 1750
In 1990
In 13th Centiry
Before 10th century
Astigmatic ophthalmic lens was invented by __________.
Monoyer
Dr Tscherning
Allvar Gulstrand
Bifocal lens was invented in _____.
1888
1908
1926
1955
Which country the CR39 material was developed?
Canada
Colombo
Colombia
Costa Rica
Which of the following statement is BEST described the plastic lens?
Plastic lens is the most common materials for safety lens
plastic lens has scratch resistant surface
Plastic Lens is the most ecomomical lens
Plastic lens has index of 1.53
What is the highest possible index of refraction used in plastic ophthalmic lenses?
1.80
1.50
1.61
1.74
Which of the following statement is BEST described the ophthalmic lens hand neutralization?
The most accurate method to measure the lens power
it can be used to measure the amount of prism in the lens
It is used to measure the front vertex power of the lens
It can be used to locate the optical centre of the lens
Focimeter is the instrument that measures the _________ and _________ of a lens.
power, curvature
power, optical center
optical centre, thickness
curvature, optical centre
Which of the following statements is BEST describe the focimeter?
can calculate the prismatic effect in the lens
to measure the power of the lens
the Gold standard in measuring the lens
to measure the thickness of the lens
Transposition is the ______ of converting a _______ from one possible formulation to another.
flow, power
process, power
flow, prescription
process, prescription
Transprose
-2.00 / +1.00 x 180
to minus cyl
-1.00 / -1.00 x 90
-2.00 / -1.00 x 90
-1.00 / -1.00 x 180
-2.00 / -1.00 x 180
Transpose
+2.00 / -2.00 x 180
to plus cyl
pl / +2.00 x 90
pl / +2.00 x 180
-2.00 / +2.00 x 90
-2.00 / +2.00 x 180
Transpose
-2.00 / -1.00 x 45
to plus cyl
-3.00 / +1.00 x 135
-2.00 / +1.00 x 135
-3.00 / +1.00 x 45
-2.00 / +1.00 x 45
Lens prescription is _______ instruction for a patient issued with the _______.
verbal, treatment
written, treatment
verbal, medication
written, medication
Which of the following parameters is important in lens prescription?
Pupil distance, Frame
Pupil distance, Price
Pupil distance, Prescription, Frame
Pupil distance, Prescription, Price
Prismatic effect _________ as the distance from the optical centre to the incident ray ___________.
increase, increase
increase, decrease
decrease, decrease
decrease, increase
Which of the following statement is BEST described the prismatic effect?
Prismatic effect will reduce the field of view
Prismatic effect deviating power of a lens at any given point
light will bend to the apex of the prism
can be prescribed to all patient
Which of the following is TRUE if the displacement is 3 mm below from the optical centre of a +3.00 D lens?
0.9 PBU
0.6 PBU
0.9 PBD
0.6 PBD
A size 54mm
B size 34mm
DBL 18mm
Effective Diameter 55mm
Pt. Pupillary distance 66mm
Pt. Pupil height 20mm
Calculate
1. Horizontal decentration
2. Vertical decentration
3. MSU
Ophthalmic dispensing instruments play a critical role in the field of optometry and vision care, facilitating accurate measurement, diagnosis, and prescription of corrective lenses.
a. Discuss about the evolvement of the ophthalmic dispensing.
b. Explain about FIVE (5) frame material involve in the ophthalmic dispensing.
Explain the significance of frame and lens selection in ophthalmic dispensing and provide examples and illustrate how the analysis of various factors contributes to effective decision-making in optimizing patient outcomes.
Discuss the technological advancements in ophthalmic lens manufacturing, highlighting their impact on vision correction and the professional implications for optometrists operating.
Accurate ophthalmic lens power measurement is crucial in providing effective vision correction and ensuring patient satisfaction. Explain about the significance of precise lens power measurement and give example on lens transposition techniques to convert lens prescriptions between various formats.
