ABO ADVANCE STUDY GUIDE
COMPLETE SOLUTION 100% VERIFIED
ANSWERS A+ GRADED FREE
mWhen 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 mis mof mmore mconcern mto mwhich mwearer? m- m mCorrect manswer.Cataract mpatients
_______ mis mbetter mthan m______ mfor mimproving mcontrast? m- m mCorrect manswer.Green-Gray
_______ madded mto many mcolor mincreases mcontrast. m- m mCorrect manswer.Yellow
Although mthis mmay mbe mthe mmost mpopular mcolor mfor msun mlenses, mit mis mnot mrecommended mfor
mpatients mwith memerging mcataracts. m- m mCorrect manswer.Gray
Given ma mhigh mplus mor mhigh mminus mRX, mwhich mlens mmaterial mwould moffer mthe mbest mchoice mfor
muniform mdensity min msun mlenses? m- m mCorrect manswer.CR-39 m& mTrivex
A mCharacteristic mof ma mdark mtinted mglass mlens mwith man mRX mof m+4.00 mSPH mwould mbe m_________. m-
m mCorrect manswer.Darker min mthe mcenter mand mlighter mon mthe medge
If ma mperson mhas mexposure mto msunlight mat mleast m2 mhours mor mmore mduring mthe mday, m__________. m-
m mCorrect manswer.their mability mto madapt mto mnight mvision mis mcompromised mif mthey mdon't mprotect
mtheir meyes mfrom mthe msun mexposure.
Standard mtransmission mis msun mlenses mshould mrange mbetween m_________. m- m mCorrect manswer.15%
mto m30%
The mdenser mthe mtint min ma mlens, m__________ m- m mCorrect manswer.the mless mtransmission mof mlight
mthrough mthe mlens.
COMPLETE SOLUTION 100% VERIFIED
ANSWERS A+ GRADED FREE
mWhen 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 mis mof mmore mconcern mto mwhich mwearer? m- m mCorrect manswer.Cataract mpatients
_______ mis mbetter mthan m______ mfor mimproving mcontrast? m- m mCorrect manswer.Green-Gray
_______ madded mto many mcolor mincreases mcontrast. m- m mCorrect manswer.Yellow
Although mthis mmay mbe mthe mmost mpopular mcolor mfor msun mlenses, mit mis mnot mrecommended mfor
mpatients mwith memerging mcataracts. m- m mCorrect manswer.Gray
Given ma mhigh mplus mor mhigh mminus mRX, mwhich mlens mmaterial mwould moffer mthe mbest mchoice mfor
muniform mdensity min msun mlenses? m- m mCorrect manswer.CR-39 m& mTrivex
A mCharacteristic mof ma mdark mtinted mglass mlens mwith man mRX mof m+4.00 mSPH mwould mbe m_________. m-
m mCorrect manswer.Darker min mthe mcenter mand mlighter mon mthe medge
If ma mperson mhas mexposure mto msunlight mat mleast m2 mhours mor mmore mduring mthe mday, m__________. m-
m mCorrect manswer.their mability mto madapt mto mnight mvision mis mcompromised mif mthey mdon't mprotect
mtheir meyes mfrom mthe msun mexposure.
Standard mtransmission mis msun mlenses mshould mrange mbetween m_________. m- m mCorrect manswer.15%
mto m30%
The mdenser mthe mtint min ma mlens, m__________ m- m mCorrect manswer.the mless mtransmission mof mlight
mthrough mthe mlens.
