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ABO EXAM SAMPLE QUES

QuestionAnswer
A pair of spectacles with a far point of 75 cm has a refractive power in diopters Plus 1.33 diopters
The Rays of light pass through a lens without deviation must be aligned to the following Optical center
The dead center of the lens is called Geometric Center
What is The Descent tration of a frame a size 50 and DBL 16 and patient PD of 70 4 mm out
Spherical lenses designed Identical curvatures in meridians and point Focus
Prescriptions are written with the following to indicate what Oculus Dexter right lens and Oculus Sinister left lens
An ad power on a prescription indicates Additional power required for tasks
Plus lenses have the following characteristics Magnifies image and has against motion
The refractive error that focuses parallel rays of light behind the retina Hyperopia
Minus lenses have the following characteristics Divergence incident light rays corrects myopia
What is the sphere power of a lens if the front curve is + 6 and the back curved is -4 +2.00 sphere power
What is the index of refraction with a medium of 124000 + PS and the speed of light in air of 186,000 MPS 1.50
When light strikes a medium it will do the following Light refracts, light absorbed, light reflex
When plus lenses in spectacles move away the following happens They get stronger
Intermediate prescription is how far away for patients 16 - 24 inches
How much prison is induced with a minus 4.00 diopter lens when the OC is moved out 6mm in which direction 2.4 base in
What is the power of a lens with a focal length of 44.44 cm 2.25 diopters
The lens clock Geneva lens measure is calibrated for a refractive index of 1.530
The ability of the eye to focus at varying distances is called Accommodation
If a pair of -10 diopter sphere lenses are moved closer to the eyes, how will this change the effective power Increase - power effect
How many extra ocular muscles are inserted into the sclera 6
The ciliary body Assist in accommodation
The condition in which the ability to accommodate for near Vision becomes inadequate because of loss of elasticity in the crystalline lens is called presbyopia
The OD RX requires 1 mm of dissing tration out and a segment inset of 2.50 mm. The total inset would be 3.50 millimeter in
A+ Lance is moved further from the eye it becomes effectively Stronger
A patient complains that the floor appears to be concave the optician should check for too much Not sure about answer
Which of the following would cause a patient to complain about distant objects appearing smaller An increase in minus power
A _______ is a blind area in the visual field Scotoma
An instrument for viewing the fundus and interior of the eye is called Retinoscope
When the margin of an eyelid turns inward it is called Entropion
When prescribed prism is used The optical center at the prism reference point PRP are not the same
What is an inflammation of the eyelids Blepharitis
Optimal prescribed prism could be used to correct Diplopia
The location on it off the moloch lens at which the specific distance prescribed should apply is known as the Prism reference point or PRP
Which of the following could best use the Double D lenses A motorcyclist B tennis player C secretary D electrician Electrician
When weeding the image is brought to focus by the retina buy an ability known as Celery contraction
When light rays From A Distant Source comes to focus in front of the retina the condition is known as Myopia
Where does Fusion occur In the brain
A young child is being fitted for glasses. One eye turns in noticeably. The condition is called Esotropia
Impulses travel from the retina to the brain along the Optic nerve
Night vision is primarily the function of the Rods
Another term for farsighted is Hyperopic
How many inches are in a meter 39.37
What is the speed of light in air 186,000 miles per second
______is the clouding of the eye or of its capsule obstructing the passage of light Cataract
A prism will displace in image towards_____ and ray of light towards the _____ Apex, Base
______ is determined by using Prentice rule Prismatic effect
In prism what best describes a plus lens Base to Base
What type of stigmatism is in the following RX -0.50 + 0.75 x 100 Mixed astigmatism
A minus lens can be described as having a ______ focal point will a plus lens has a _____ focal point Virtual and real
Which of the following is not considered when calculating vertical Prismatic imbalance a cylinder power at 90 degrees B spear power at 90 degrees C reading depth D ADD power Add power
In order to properly fit Progressive power lenses, what measurements must be taken Monocular PD and monocular segment height
Which of the following lens materials is the most impact resistant A CR 39 b crown glass C polycarbonate d barium crown Polycarbonate
Light rays emanating from an object will be Diverging
The distance from the crest of one wave to the crest of the next wave is called Wavelength
When light travels through an optical medium from higher density it Is refracted toward the normal angle or is refracted and reflected and partially absorbed
Refractive index is The ratio of the speed of light in air to the speed of light in an optical medium
The index of refraction is the highest in Flint glass
Which of the following frame adjustments would provide the maximum field of view through a segment Move the lenses closer to the eye
A+ 10 diopter lens is moved 5 mm closer to the eye. What new power will be needed to compensate this change in vertex distance Plus 10.50 diopters
In spectacle lenses when is it important to consider vertex changes When the power exceeds plus or minus 7 diopters
When is a lens shape called that has one convex surface and one concave service A meniscus lens
What is the best way to instruct a bifocal where to use the segment Raise the chin and drop the eyes
When using a lensometer to neutralize a pair of unknown lenses the first reading should be at The optical center of the right lens the optical center of the strongest lens
The normal is an imaginary line considered a right angle to the surface at the incident point
Light rays that originated at the distant Point are described as Parallel
Minus lenses Show with motion
Plus lenses Converge light rays
What would allow 98 to 99 light transmission Anti-reflective coating
A-minus lens moved up creates Bass Down prism
An eye condition where the lens becomes cloudy is called cataract
The tools that is most used to adjust nose pads is called Needle nose pad pliers
What causes the floor or other horizontal expanse two-seam convex and the patient feels as if they are standing on a mound or Ridge Excessive base of prism
The ability to combine two images through both eyes into a single visual perception is called Fusion
A pair of prescription glasses were received 5 mm in with a minus 5 diopter, how much prism was induced and in which direction 2.5 base in
Esotropia A marked deviation of the eye inward
Frame material that is a lightweight plastic zyl Cellulose acetate propionate
which coating is good for night driving reducing glare allows more light transmission good for computer and overhead fluorescent lighting Anti-reflective coating
Lenses that are designed for presbyopic patients who need accommodation for distance middle range and reading are called Progressive lenses
Of the following lenses which one is the most impact resistant a plastic b- Trivex c high index D polycarbonate Polycarbonate
A gradient is tinted as follows It's tinted dark on top and light on the bottom
A normal I wear light he rests on the retina Emmetropia
A-frame style that has a fishing wire located at the bottom of the lens is called Groove frame
the PD measurement that are correct for progressive lenses Monocular PD measurement
A condition which the roof of the cornea can cause two focal points to fall into two different locations making distance and close up objects vision blurry Astigmatism
A metal frame that is lightweight Titanium
When measuring bifocals you measure Measure at the lower lid margin
To adjust for pantoscopic tilt Decrease the temples
Access Pliers are good for the following adjustments Used to rotate the lens in the frame
A lens clock is used Measure front and back curve of lenses
Which agency made it mandatory to verify impact-resistant of ophthalmic lenses The FDA
A distant meter is used for Measure vertex distance in a high-powered lens
A lens caliper is used for measuring length thickness
What agencies established unfair business practices such as deceptive advertising and monopolies FTC Federal Trade Commission
A pair of spectacles with a -2.5 diopter were made for mmm in and how much prison was created and in which direction 1 base in
The index refraction of high index lenses 1.67
The movement of two objects towards a common Point as the eyes turning in to see a closed point is called Convergence
A drop ball test used to test impact resistance 5/8 steel ball weighed .56 Oz dropped from a height of 50 in
A condition in the lens of one eye sees an image that differs in size or shape from the image seen by the other eye Anoseikonia
HIPAA stands for Health insurance portability and accountability Act
ANSI standard for horizontal prism in balance 0.00 diopters ,+/- 2.75 >+/-2.75D and +/-.67 total +/- 2.5 mm Total
A pair of spectacles with a plus-4 diopter were received four mm out how much prism was induced and in which direction 1.6 base out
Created by: Tuxgirl
 

 



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