ABO Revision Questions and answers |100% verified answers
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Course
ABO
Institution
ABO
ABO Revision Questions and answers |100% verified answers
The cornea consist of five layers which an order from interior to prosterior are?
There are approximently ____ million rods located mainly in periphery of the retina & _____ million cones locates centrally in retina
ABO Revision Questions and answers |100%
verified answers
The cornea consist of five layers which an order from interior to prosterior are? -
answer- epithelium, bowmans layer, stroma, descments membrane & endothelium.
The amount of light entering the eye is controlled by the? -answer- Iris
There are approximently ____ million rods located mainly in periphery of the retina &
_____ million cones locates centrally in retina -answer- 120 million rods & 6 million
cones
The term for the refractive condition were light comes to a focus directly on the retina: -
answer- Emmetropia (Also meaning Normal Eye)
The term for the refractive condition where light comes to focus behind the retina: -
answer- Hyperopia
The term for the refractive condition where light comes to focus in front of the retina: -
answer- Myopia
The term for the refractive condition where light comes to focus on two different points:
-answer- Astigmatism
The onset of presbyopia begins at about what age? -answer- 40 Yrs Old
The 6 extra ocular muscles responsible for stabilization of the eye are.. -answer-
lateral rectus, medial rectus, superior rectus, inferior rectus, superior oblique & inferior
oblique (4 rectus & 2 Superior)
Phorias and tropias are defined by their direction of movement: _____ as meaning
outward (temporarily) ____ as meaning inward (nasal) ____ as meaning downward and
____ as meaning upward -answer- Exo(Outward) , Eso(inward) Hypo(Downward)
Hyper(upward) ; Tropia means PERMANENT , Phoria WONDERING
We really see with our.. -answer- Brain
A perfect human eye is said to be -answer- Emmetropic
, Everyone will suffer from ____ if they live long enough -answer- Presbyopia
The fibrous tunic consist of the.. -answer- Sclera & Cornea
aqueous humor is produced by the -answer- cillilary body
The index of refraction of the cornea is -answer- 1.37
when light entering the eye without a corrective lenses comes to a focus partially in front
of the retina and partially in back of the retina the patient refractive error is -answer-
Mixed Astigmasm
when light entering the eye without corrective lenses come to focus in front of the retina
the patients refractive error is -answer- Myopia
The patient normally has no need for any visual correction for distance but does require
prescription lenses to see while at near the patients refractive error is known as.. *far
sighted* -answer- Hyperopia (Passed retina)
on RX with the OD minus & the OS plus is an obvious case of.. (+-) -answer-
Antimetropia
accommodation is defined as.. -answer- The act of the crystalline lens changing shape
to focus on objects
The speed of light travels is about -answer- 186,000 miles per second
The wavelength of 700 nm is seen by the brain as what color.. -answer- Red
in a minus powered lens light rays ____ and are said to come to a focal point ____ the
lens -answer- Diverge , infront of
light rays pass through a lens and converge at a point of 50 cm behind the lens what is
the power? -answer- +2.00 D *Converge + Diverge - * FL M/D
One prism diopter can be described as deviating a ray of light____ at a distance ____ -
answer- 1cm , 1meter
three prism diopter base in on the right eye can also be described as____ -answer-
3.00 @ 000 degrees
The index of a refraction is lowest in which of the following? -answer- Air
when the direction of light changes as it passes from one medium to another it is
called? -answer- Refraction
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