ABO NCLE EXAM UPDATED SCRIPT ALL QUESTIONS
AND ANSWERS SURE A+
✔✔What is the first step to netrulize a frame in lensometer? - ✔✔Focus the eyepiece,
turn the eyepiece counter clockwise till blurry and clockwise till clear
✔✔What is a lens caliper used for? - ✔✔to measure the thickness of a lens
✔✔The image on a prism moves toward - ✔✔The Apex
✔✔Light on prism deviates towards - ✔✔The Base
✔✔A Plus lens ________ light - ✔✔Converges
✔✔A Minus lens ________ light - ✔✔Diverges
✔✔The lower the abbe value - ✔✔the higher the chromatic abberation
✔✔Three fluid filled chambers of the eye - ✔✔Anterior, Posterior, Vitreous
✔✔5 layers of the Eye - ✔✔Epithelium, Bowman's Membrane, Stroma, Descemet's
Membrane, Endothelium
, ✔✔the ability of the eye to change the focal length of the lens by changing the curvature
of the eye lens. - ✔✔Accomidation
✔✔Canal of Schlemm does what - ✔✔drains the aqueous humor
✔✔A watery fluid produced in ciliary body which fills the anterior and posterior
chambers that maintains pressure in the eye and provides nutrients to the lens and
cornea. - ✔✔Aqueous humor
✔✔How may diopters is a standard emmetropic eye? - ✔✔The total refractive power of
the eye is about 40 diopters.
✔✔focal length equation - ✔✔1/D
✔✔Diopter equation - ✔✔1/F (Distance in meters)
✔✔Slab off equation - ✔✔Px10/10
✔✔Vertex distance equation - ✔✔Power error= Power/ 1+ distance x power (distance in
meters)
✔✔5mm = how many meters - ✔✔0.005 meters
✔✔5 mm = how many cm - ✔✔0.5 cm
✔✔5 meters = how many cm - ✔✔500 cm
✔✔Aspheric lenses are benfited from what type of perscription - ✔✔Stronger
perscriptions
✔✔What are 3 types of minus lens configurations - ✔✔bi-concave )(
plano concave )]
meniscus ))
✔✔What are the 3 types of plus lens configurations - ✔✔Bi-Convex ()
plano convex [)
meniscus ))
✔✔Do higher or lower abbe values result in the least dispersion and best vision? -
✔✔Higher
AND ANSWERS SURE A+
✔✔What is the first step to netrulize a frame in lensometer? - ✔✔Focus the eyepiece,
turn the eyepiece counter clockwise till blurry and clockwise till clear
✔✔What is a lens caliper used for? - ✔✔to measure the thickness of a lens
✔✔The image on a prism moves toward - ✔✔The Apex
✔✔Light on prism deviates towards - ✔✔The Base
✔✔A Plus lens ________ light - ✔✔Converges
✔✔A Minus lens ________ light - ✔✔Diverges
✔✔The lower the abbe value - ✔✔the higher the chromatic abberation
✔✔Three fluid filled chambers of the eye - ✔✔Anterior, Posterior, Vitreous
✔✔5 layers of the Eye - ✔✔Epithelium, Bowman's Membrane, Stroma, Descemet's
Membrane, Endothelium
, ✔✔the ability of the eye to change the focal length of the lens by changing the curvature
of the eye lens. - ✔✔Accomidation
✔✔Canal of Schlemm does what - ✔✔drains the aqueous humor
✔✔A watery fluid produced in ciliary body which fills the anterior and posterior
chambers that maintains pressure in the eye and provides nutrients to the lens and
cornea. - ✔✔Aqueous humor
✔✔How may diopters is a standard emmetropic eye? - ✔✔The total refractive power of
the eye is about 40 diopters.
✔✔focal length equation - ✔✔1/D
✔✔Diopter equation - ✔✔1/F (Distance in meters)
✔✔Slab off equation - ✔✔Px10/10
✔✔Vertex distance equation - ✔✔Power error= Power/ 1+ distance x power (distance in
meters)
✔✔5mm = how many meters - ✔✔0.005 meters
✔✔5 mm = how many cm - ✔✔0.5 cm
✔✔5 meters = how many cm - ✔✔500 cm
✔✔Aspheric lenses are benfited from what type of perscription - ✔✔Stronger
perscriptions
✔✔What are 3 types of minus lens configurations - ✔✔bi-concave )(
plano concave )]
meniscus ))
✔✔What are the 3 types of plus lens configurations - ✔✔Bi-Convex ()
plano convex [)
meniscus ))
✔✔Do higher or lower abbe values result in the least dispersion and best vision? -
✔✔Higher
