ABO practice exam ophlthalmic optics, Exam Questions And Correct Answers.

ABO practice exam ophlthalmic optics, Exam Questions And Correct Answers. . Columbia Resin-39. . Lenses that commonly referred to as plastic are made of a material called ___________ a. Zylonite. b. Columbia Resin-39. c. Hivex. d. Polycarbonate. Runs perpendicular to The "normal" is an imaginary line that ________________ the lens surface. a. Refracts through b. Runs parallel to c. Runs perpendicular to d. Reflects off of .Simple hyperopic astigmatism . +3.00 -3.00 x 180 is an indication of a _______________ a. Simple myopic astigmatism. b. Mixed astigmatism. c. Compound hyperopic astigmatism. d. Simple hyperopic astigmatism. Emmetropia. A patient that presents with a plano prescription is diagnosed with ____________ a. Astigmatism. b. Hyperopia. c. Emmetropia. d. Antimetropia. Hyperopia. . If a lens has more seems to be stronger when the glasses slide down the nose, then the lens is correcting for __________________ a. Hyperopia. b. Myopia. c. Amblyopia. d. Presbyopia. Biconvex . A lens that has a plus curve on the front surface and a front curve on the back surface is called a _____________. a. Biconcave b. Bitoric c. Lenticular d. Biconvex Sphero-cylinder If a lens exhibits a scissoring motion, then it is a ______________ lens. a. Sphero-cylinder b. Meniscus c. Lenticular d. Progressive Curves An optical cross represents the physical __________ of a lens. a. Waves b. Curves c. Gradients d. Thickness Meniscus A lens that has a plus curve on the front surface and a minus curve on the back surface is called a _____________ lens. a. Biconcave b. Bitoric c. Lenticular d. Meniscus Powers in the principal meridians. Transposing is conducted to determine ____________ a. Thickness. b. Near power. c. Lens compensation. d. Powers in the principal meridians. . Executive Which lens would be the heaviest, all factors being the same? a. Executive b. Round 22 c. FT35 d. Ultex Refracted. .When a white light is broken down into its component colors, it is __________ a. Aberrated. b. Refracted. c. Reflected. d. Diffracted. . Glass .The velocity of light is the least in ______________ a. Water b. Snow c. Glass d. Air . 186,000 miles per second .___________________ is the speed of light. a. 186,000 miles per hour b. 186,000 miles per second c. 186,000 millimeters per hour d. 186,000 millimeters per second . A spherical and a cylinder component of the lens Compound lenses have __________________ a. Two different lens materials laminated together. b. A segmented add on a single vision lens carrier c. A bifocal placed on the top or the bottom of the lens d. A spherical and a cylinder component of the lens. Spherical aberration _____________________ is the aberration that is of most concern to the lens designer. a. Spherical aberration b. Abbe c. Distortion d. Coma . Vertical A slab-off is ground on the lens with the least amount of power in the _______________ meridian. a. Primary b. Horizontal c. Vertical d. Oblique Reflected, Refracted, and Absorbed. Light, when it reaches the surface of a lens, is ____________a. Reflected. b. Refracted. c. Absorbed. d. Reflected, Refracted, and Absorbed. Wavelength. The measure of a light from trough to trough is called a _______________ a. Nanometer. b. Wavelength. c. Spectrograph. d. Vertometer. Axial ray The ray that passes through a lens without being deviated is known as the _______ a. Normal. b. Axial ray. c. Divergent ray. d. Incident ray. Base Down Most Plus .A reverse slab-off has prism ground_______________ a. Base Up Most Minus. b. Base Down Most Minus. c. Base Up Most Plus. d. Base Down Most Plus. Scissoring. All lenses surfaced with toricity exhibits ___________ a. With motion. b. Scissoring. c. Magnification. d. Against motion. 58. .CR-39 has a nu-value of ____________ a. 58. b. 30. c. 45. d. 68. Slab-off. Bicentric grinding is also known as _____________ a. Edging. b. Surfacing. c. Glazing. d. Slab-off. . BD A plus lens that has mistakenly been measured with an optical center too low exhibits __________ prism. a. BI b. BD c. BO d. BU . At the geometric center. The optical center of a round seg is located ______________ a. 4mm from the top of the seg. b. At the top of the seg. c. At the geometric center. d. 10mm from the top of the seg. With A lens designed to treat myopia exhibits _________________ motion. a. Oblique b. Scissoring c. With d. Against Toward the normal. .A ray of light that passes through a lens, once it leaves a lens, is bent ___________. a. At a 90-degree angle. b. At the angle of incidence. c. Away from the normal. d. Toward the normal. 45 .If the angle of incidence is 45 degrees, then the angle of reflection is __________ degrees. a. 0 b. 45 c. 90 d. 135 Compound hyperopic +4.00 -3.00 X 45 is an indication of _________________ astigmatism. a. Compound myopic b. Compound hyperopic c. Mixed d. Simple hyperopic 090°. Utilizing the 360° prism method a base up prism is at ___________ a. 090°. b. 180°. c. 270°. d. 360° Myopia The condition in which light focuses in front of the retina is ____________ a. Hyperopia. b. Emmetropia. c. Myopia. d. Astigmatism. Polycarbonate The material with the lowest Abbe value is ______________ a. 1.74. b. CR-39. c. Hi-index glass. d. Polycarbonate Has no corrective error. Emmetropia is the condition in which a patient ________________ a. Is nearsighted. b. Is farsighted. c. Has a muscle weakness. d. Has no corrective error. Refractive power. The relationship between the front curve and the back curve will give the optician the ______________ a. Sagittal depth. b. Refractive power. c. Effective diameter. d. Center Thickness. Support the upper lid. A ptosis crutch is used to _________________ a. Support the upper lid. b. Support the lower lid. c. Support the bridge. d. Support the nosepad. Silver halide ____________ is the ingredient in glass photochromics that enable the lens to change. a. Silver nitrate b. Oxidated halide c. Silver halide d. Oxidated nitrate Minus .The manufacturing of lenses occurs in _______________ cylinder form. a. Plus b. Oblique c. Compound d. Minus Hyperopia The condition in which light focuses behind the retina is ____________ a. Hyperopia. b. Emmetropia. c. Myopia. d. Astigmatism. -0.50 Rewrite the following prescription for a spherical equivalent power: +1.00 -3.00 x 080 a. +1.00 b. -2.00 c. -3.00 d. -0.50 Mixed astigmatism. The condition in which light is split and one ray focuses in front of the retina and one ray focuses behind the retina is __________ a. Compound hyperopic astigmatism. b. Compound myopic astigmatism. c. Simple myopic astigmatism. d. Mixed astigmatism. The point of the lens where there is no deviation from the optical axis. The optical center of a lens is_______________ a. Where the A, ED and B measurements intersect. b. At the geometric center. c. The point of the lens where there is no deviation from the optical axis. d. At the datum line. +1.00 -2.00 x 180 +0.50 -2.00 x 180 Adjust the following prescription for near vision only: -1.00 -2.00 x 180 -1.50 -2.00 x 180 2.00 add a. +2.00 -2.00 x 180 +2.00 -2.00 x 180 b. +1.00 -2.00 x 180 +0.50 -2.00 x 180 c. -2.00 -2.00 x 180 -2.50 -2.00 x 180 d. -1.00 -2.00 x 180 -0.50 -2.00 x 180 Toward the base. Light passing through a prism is deviated ______________ a. Toward the base. b. Toward the 090 axis. c. Toward the 180 axis. d. Toward the apex. Simple hyperopic astigmatism The condition in which light is split and one ray focuses on the retina and one ray focuses behind the retina is _______________ a. Compound hyperopic astigmatism. b. Simple hyperopic astigmatism. c. Simple myopic astigmatism. d. Mixed astigmatism. PhotoGray. With all parameters being equal, the lens material that would be the heaviest is _____________ a. PhotoGray. b. CR-39. c. Polycarbonate. d. Trivex. Virtual image .All of the following are a characteristic of a plus lens EXCEPT: a. Convergent b. Magnified c. Virtual image d. Against motion Pencil. A group of rays is called a _______________ a. Pencil. b. Proton. c. Beam. d. Laser. Phoria. Tendency of the eye to turn is called _________________ a. Amblyopia. b. Phoria. c. Anisometropia. d. Tropia. The sun .The greatest source of "blue light" is ___________________ a. Computers. b. Handhelds. c. The sun. d. LED lights. 50% .The intermediate power of a trifocal is typically _________ the add power. a. 25% b. 33% c. 50% d. 66% Simple myopic astigmatism. .The condition in which light is split and one ray focuses on the retina and one ray focuses in front the retina is __________________ a. Compound hyperopic astigmatism. b. Simple hyperopic astigmatism. c. Simple myopic astigmatism. d. Mixed astigmatism. Toward the apex. An object when viewed through a prism is deviated _____________ a. Toward the base. b. Toward the 090 axis. c. Toward the 180 axis. d. Toward the apex Against motion All of the following are a characteristic of a minus lens EXCEPT: a. Divergent b. Two prisms apex to apex c. Virtual image d. Against motion Base In Which prismatic effect is the easiest for a patient to tolerate when looking at near? a. Base In b. Base Out c. Base Up d. Base Down . Advanced presbyope.