NAO VOLUME 1 EXAM WITH 100%
CORRECT ANSWERS
What is the minimum thickness requirement mandated for dress eyewear? - Answer-
No minimum
Which agency mandates the impact resistance for lenses? - Answer- FDA
Eyeglass II no longer lists the minimal information needed for a spectacle lens
prescription as found in eyeglass I.
True or False? - Answer- True
The "duty to inform" someone of the safest options for their eyewear needs is? -
Answer- A professional responsibility
What are the basic-impact safety eyewear minimum thickness? - Answer- 3.0mm
How must a safety frame suitable for high impact safety lenses be marked on the front
and the temples? - Answer- Size manufacturer and Z87-2
Which muscle is responsible for turning the eye towards the nose? - Answer- Medial
rectus
What are the three general eyewear categories? - Answer- Dress, Safety, Sports
What are two disadvantages of glass lenses? - Answer- Heavyweight and doesn't tint
Lens materials classified by index of refraction, what are these classifications? -
Answer- Low index, mid index, high index, ultra high index
What are the FDA regulations for dispenser record keeping? - Answer- Records must
be kept for three years
Explain why polycarbonate is a high impact resistant material? - Answer- The nature of
the material is softer so it will bend before breaking
For which patient groups is visual safety a major concern? - Answer- Monocular
individuals
athletes
,children
certain occupations
people that have had ocular surgeries or traumas
Transpose the following:
a. -1.50 +1.00 x 035
b. +2.00 -3.00 x165 - Answer- a. +0.50 -1.00 x 145
b. -1.00 +3.00 x 075
Name another lens material besides polycarbonate that are also impact resistant? -
Answer- Trivex, NXT
What are the three that can happen to ray of light? - Answer- Reflected, refracted,
absorbed
What is the law of reflection? - Answer- Angle of incidence equals angle of reflection
What are the three laws of refraction? - Answer- 1. When a ray passes through a
medium perpendicular to the surface, it slows down
2. Goes from less dense to more dense, bends towards the normal
3. Goes from more dense to less dense, bends away from the normal
We use the acronym ROY G BIV to help remember the order of the colors. It lists colors
that have wavelengths from-to? - Answer- Long wavelength (around 700nm) to short
wavelength (around 400nm)
Which wave length of ultra-violet radiation is absorbed by the ozone layer? - Answer-
UV-C
What is the axial length of the average eye? - Answer- 26.5mm
What is another word for the eyelids? - Answer- Palpebrae
What muscle relaxes to allow the eyelid to droop or sag? - Answer- Frontalis
What is the size of the bony orbit in the average adult? - Answer- 35mm-40mm
Reflex tears are produced by________ and are generally caused by_______? -
Answer- -The lacrimal glands
- Stimulus such as coughing, sneezing, strong smells, emotions
Which glands produce basic tear secretion? - Answer- Glands of wolfing and glands of
krause
, The three layers of the tear film in order from outermost to innermost are the? - Answer-
Lipid, aqueous, mucin
The layer of the tear film that contains the nutrients and antibiotic properties is the? -
Answer- Aqueous
The layer of the tear film that is responsible for prevention of evaporation is the? -
Answer- Lipid
The layer of the tear film that is responsible for holding the tears on the cornea is the? -
Answer- Mucin
The term for the collection of the thin film of tears on the lower lid margin is? - Answer-
Tear lake, Tear prism, Tear meniscus
What is the term for the eyelids turning outward? - Answer- Ectropion
What is the term for the eyelids turning inward? - Answer- Entropion
What is the name of the mucous membrane that lines the lids and the globe of the eye?
- Answer- Conjunctiva
What do the goblet cells produce? - Answer- Mucous
What is the term for an inflammation of the conjunctiva? - Answer- Conjunctivitis
The outer tunic consists of the______ ,_______ and additionally the _____ and
______? - Answer- -Sclera
-Cornea
-Limbus
-Fibrous
The five layers of the cornea from outermost to innermost in order are? - Answer- -
Epithelium
-Bowman's Layer
-Stroma
-Descemet's membrane
-Endothelium
The average power of the cornea is? - Answer- 42.00-45.00 diopters
The cornea receives oxygen from? - Answer- Tears, and blood vessels
How many layers are there in the epithelium? - Answer- 5 to 7
If this layer of the cornea is damaged, scar tissue will form? - Answer- Bowman's layer
CORRECT ANSWERS
What is the minimum thickness requirement mandated for dress eyewear? - Answer-
No minimum
Which agency mandates the impact resistance for lenses? - Answer- FDA
Eyeglass II no longer lists the minimal information needed for a spectacle lens
prescription as found in eyeglass I.
True or False? - Answer- True
The "duty to inform" someone of the safest options for their eyewear needs is? -
Answer- A professional responsibility
What are the basic-impact safety eyewear minimum thickness? - Answer- 3.0mm
How must a safety frame suitable for high impact safety lenses be marked on the front
and the temples? - Answer- Size manufacturer and Z87-2
Which muscle is responsible for turning the eye towards the nose? - Answer- Medial
rectus
What are the three general eyewear categories? - Answer- Dress, Safety, Sports
What are two disadvantages of glass lenses? - Answer- Heavyweight and doesn't tint
Lens materials classified by index of refraction, what are these classifications? -
Answer- Low index, mid index, high index, ultra high index
What are the FDA regulations for dispenser record keeping? - Answer- Records must
be kept for three years
Explain why polycarbonate is a high impact resistant material? - Answer- The nature of
the material is softer so it will bend before breaking
For which patient groups is visual safety a major concern? - Answer- Monocular
individuals
athletes
,children
certain occupations
people that have had ocular surgeries or traumas
Transpose the following:
a. -1.50 +1.00 x 035
b. +2.00 -3.00 x165 - Answer- a. +0.50 -1.00 x 145
b. -1.00 +3.00 x 075
Name another lens material besides polycarbonate that are also impact resistant? -
Answer- Trivex, NXT
What are the three that can happen to ray of light? - Answer- Reflected, refracted,
absorbed
What is the law of reflection? - Answer- Angle of incidence equals angle of reflection
What are the three laws of refraction? - Answer- 1. When a ray passes through a
medium perpendicular to the surface, it slows down
2. Goes from less dense to more dense, bends towards the normal
3. Goes from more dense to less dense, bends away from the normal
We use the acronym ROY G BIV to help remember the order of the colors. It lists colors
that have wavelengths from-to? - Answer- Long wavelength (around 700nm) to short
wavelength (around 400nm)
Which wave length of ultra-violet radiation is absorbed by the ozone layer? - Answer-
UV-C
What is the axial length of the average eye? - Answer- 26.5mm
What is another word for the eyelids? - Answer- Palpebrae
What muscle relaxes to allow the eyelid to droop or sag? - Answer- Frontalis
What is the size of the bony orbit in the average adult? - Answer- 35mm-40mm
Reflex tears are produced by________ and are generally caused by_______? -
Answer- -The lacrimal glands
- Stimulus such as coughing, sneezing, strong smells, emotions
Which glands produce basic tear secretion? - Answer- Glands of wolfing and glands of
krause
, The three layers of the tear film in order from outermost to innermost are the? - Answer-
Lipid, aqueous, mucin
The layer of the tear film that contains the nutrients and antibiotic properties is the? -
Answer- Aqueous
The layer of the tear film that is responsible for prevention of evaporation is the? -
Answer- Lipid
The layer of the tear film that is responsible for holding the tears on the cornea is the? -
Answer- Mucin
The term for the collection of the thin film of tears on the lower lid margin is? - Answer-
Tear lake, Tear prism, Tear meniscus
What is the term for the eyelids turning outward? - Answer- Ectropion
What is the term for the eyelids turning inward? - Answer- Entropion
What is the name of the mucous membrane that lines the lids and the globe of the eye?
- Answer- Conjunctiva
What do the goblet cells produce? - Answer- Mucous
What is the term for an inflammation of the conjunctiva? - Answer- Conjunctivitis
The outer tunic consists of the______ ,_______ and additionally the _____ and
______? - Answer- -Sclera
-Cornea
-Limbus
-Fibrous
The five layers of the cornea from outermost to innermost in order are? - Answer- -
Epithelium
-Bowman's Layer
-Stroma
-Descemet's membrane
-Endothelium
The average power of the cornea is? - Answer- 42.00-45.00 diopters
The cornea receives oxygen from? - Answer- Tears, and blood vessels
How many layers are there in the epithelium? - Answer- 5 to 7
If this layer of the cornea is damaged, scar tissue will form? - Answer- Bowman's layer
