ABO Advance Study Guide Questions And Answers 100% Verified.
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ABO advance
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ABO Advance
ABO Advance Study Guide Questions And Answers 100% Verified.
When taking seg height measurements, which of the following situations could result in a parallax error? - correct answer. Patient sitting/ dispenser standing erect
Which of the following is not significant in identifying t...
ABO Advance Study Guide Questions And
Answers 100% Verified.
When taking seg height measurements, which of the following situations could result in
a parallax error? - correct answer. Patient sitting/ dispenser standing erect
Which of the following is not significant in identifying the problem of vertical imbalance?
- correct answer. Patient's age
Which of the following elements is NOT critical when determining vertical imbalance? -
correct answer. Lens power in the 180 degree meridian
A prism will displace the object being viewed towards its ________. - correct answer.
Apex
A prism will bend light towards its _______. - correct answer. Base
When dealing with problems of vertical imbalance which is the critical meridian of total
lens? - correct answer. 90
Which of the following prescriptions would pose the greatest prismatic imbalance at a
reading depth of 10mm? - correct answer. OD +2.50
OS -0.25 +2.50 x 090
A plus lens moved downward from the primary position will result in: - correct answer.
Base down prismatic effect
What is a hereditary pigmentary degeneration of the retina called which results in
gradual loss of peripheral vision? - correct answer. Retinitis pigmentosa
What is ocular hypertension? - correct answer. Elevation of pressure in the eye above
the range considered with an detectable changes in vision or damage to the structure of
the eye.
or
,Eye pressure can be elevated and cause damage in some eyes, but no damage in
others.
Which of the following statements is false regarding corneal ulcers? Corneal ulcers can
be ________. - correct answer. of little concern
Approximately what percentage of humans have some alterations in lens transparency
after age 65? - correct answer. 60%
What type of cataract is a fully developed opacity of the lens with fluid generation and
swelling of the lens volume? - correct answer. Hypermature
Which of the following statements is false regarding cataracts? - correct answer.
Cataracts will only form in the nucleus of the lens.
________ is the condition in which both eyes have equal refractive power. - correct
answer. Insometropia
Irregular astigmatism occurs when the principal meridians are not uniform along a major
meridian and not uniform along a meridian. They are found at some place other than 90
degree apart. Irregular astigmatism is commonly caused by trauma surgery, or corneal
dystrophy. TRUE or FALSE - correct answer. True
In poor light, a person sees red light better than blue, which is why the ocular system
tends to be more myopic, i.e. twilight myopia.
TRUE or FALSE - correct answer. True
_______ are _____ cells that detect motion within a field. - correct answer. Rods-Long
The crystalline lens is the same size at birth as in an adult, however, it adds cell layers
throughout life, packing them in which makes the crystalline lens harder and is one of
the causes of presbyopia. TRUE or FALSE - correct answer. False
The triangular structure between the choroid and root of the iris, containing the ciliary
epithelium, stroma, and ciliary muscle is the: - correct answer. Ciliary body
There are 5 layers of the cornea. They are: - correct answer. From most anterior to
posterior.
Epithelium-Bowman's Layer- Stroma- Descemet membrane- Endothelium
The refractive index of the cornea is: - correct answer. 1.376
The most powerful refracting medium of the eyes optical system is the cornea. There
are five layers of the cornea, each having a unique purpose and cell structure. One of
the requirements of clear vision is that the cornea ________. - correct answer. must
remain transparent and must have regular cell structures of all layers.
,Polarized filters are made by stretching thin sheets of __________ in one meridian. -
correct answer. Polyvinyl alcohol
Visible glare can be dangerous because it can not only wash out colors, but in some
instances, can cause _________. - correct answer. Photokeratitis
Features and benefits of Trivex include __________. - correct answer. Superior optics
Impact Resistant
Ultra-lightweight
What is the index of refraction of Trivex? - correct answer. 1.53
What is the index refraction of polycarbonate? - correct answer. 1.59
What company introduced CR-39 lenses? - correct answer. PPG industries
__________ are generally inorganic materials (metals or minerals) that are vacuum
deposited to add color on glass lenses to give a uniform density of color on the lenses. -
correct answer. Vacuum color coating
Glare is of more concern to which wearer? - correct answer. Cataract patients
_______ is better than ______ for improving contrast? - correct answer. Green-Gray
_______ added to any color increases contrast. - correct answer. Yellow
Although this may be the most popular color for sun lenses, it is not recommended for
patients with emerging cataracts. - correct answer. Gray
Given a high plus or high minus RX, which lens material would offer the best choice for
uniform density in sun lenses? - correct answer. CR-39 & Trivex
A Characteristic of a dark tinted glass lens with an RX of +4.00 SPH would be
_________. - correct answer. Darker in the center and lighter on the edge
If a person has exposure to sunlight at least 2 hours or more during the day,
__________. - correct answer. their ability to adapt to night vision is compromised if
they don't protect their eyes from the sun exposure.
Standard transmission is sun lenses should range between _________. - correct
answer. 15% to 30%
The denser the tint in a lens, __________ - correct answer. the less transmission of
light through the lens.
, The absorption of light in lenses is classified by two variables. What are they? - correct
answer. Tint & lens transmission
Aphakia - correct answer. An absence of the crystalline lens of the eye
(pseudophakia: having a false lens)
Apex - correct answer. Thinnest edge of a prism.
Anterior - correct answer. front cavity or compartment of the eye, located between the
cornea and CHAMBER: crystalline lens contains the aqueous humor.
Anisometropia - correct answer. Condition in which the refractive error of one eye
significantly differs from that of the other.
OD -1.00 OS -2.25 or OD +1.00 OS +2.25
Aniseikonia - correct answer. A condition in which the ocular image of an object as
seen by one eye differs so much in size or shape from that seen by the other eye that
the two images cannot be fused into a single impression. Unequal size of retinal
images.
Ametropia - correct answer. A refractive error in which the eye, when in a state of rest,
does not focus the image of an object upon the retina; includes "hyperopia, myopia, &
astigmatism.
any error of refraction in which images do not focus properly on the retina
Ambylopia - correct answer. Loss of vision without any apparent disease of the eye.
Lazy eye causing other eye to lose some portions of visions.
Addition - correct answer. Difference in plus power between the reading & distance
portions of a multifocal lens.
Acuity - correct answer. Visual expression of sharpness of vision (20/20 distance j.l
near)
Achromatic - correct answer. Descriptive of a lens capable of refracting light without
creating a rainbow effect.
without color
Currently, the two materials capable of passing the ANSI Z-87 High Impact Test are
polycarbonate and _____. - correct answer. Trivex
The FDA requires that impact resistance records are kept for ________. - correct
answer. 3 years
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