ABO NCLE TEST PAPER 2025/2026 QUESTIONS WITH
SOLUTION GRADED A+
✔✔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
✔✔The fluid filled area between the cornea and the iris is the ____? - ✔✔Anterior
Chamber
✔✔The fluid fulled area between the iris and the lens is known as the ______? -
✔✔Posterior chamber
✔✔Standard Trifocals have an intermediate that is what? - ✔✔50% near the add
✔✔Which of the following is recommended for children's bridge? - ✔✔Saddle bridge
✔✔what bridge distributes the weight of the glasses on the side of the nose instead of
at the top. - ✔✔Keyhole bridge
✔✔Binocular vision does what - ✔✔See clearly out of both eyes, and helps with
distance and depth perception
✔✔Monocular vision is - ✔✔The vision orginating from a single eye
✔✔Instrument used for measuring inter-ocular pressure inside the eye. (IOP) -
✔✔Tonometer
✔✔What is the A measurement? in the boxing system - ✔✔the longest horizontal
measurment ( the width of the top of one lens
✔✔What is the B measurement? in the boxing system - ✔✔the longest vertical
measurment (the length/ depth of a lens)
✔✔What is the DBL measurement? in the boxing system - ✔✔the least distance
between lenses
✔✔Cr-39 Abbe value - ✔✔59
✔✔The point on a lens through which a ray of light passes without deviation -
✔✔Occular center
✔✔The point in a lens within a frame where - ✔✔Geometeric center
✔✔eye inflammation, commonly known as pink eye - ✔✔Conjuctivitis
SOLUTION GRADED A+
✔✔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
✔✔The fluid filled area between the cornea and the iris is the ____? - ✔✔Anterior
Chamber
✔✔The fluid fulled area between the iris and the lens is known as the ______? -
✔✔Posterior chamber
✔✔Standard Trifocals have an intermediate that is what? - ✔✔50% near the add
✔✔Which of the following is recommended for children's bridge? - ✔✔Saddle bridge
✔✔what bridge distributes the weight of the glasses on the side of the nose instead of
at the top. - ✔✔Keyhole bridge
✔✔Binocular vision does what - ✔✔See clearly out of both eyes, and helps with
distance and depth perception
✔✔Monocular vision is - ✔✔The vision orginating from a single eye
✔✔Instrument used for measuring inter-ocular pressure inside the eye. (IOP) -
✔✔Tonometer
✔✔What is the A measurement? in the boxing system - ✔✔the longest horizontal
measurment ( the width of the top of one lens
✔✔What is the B measurement? in the boxing system - ✔✔the longest vertical
measurment (the length/ depth of a lens)
✔✔What is the DBL measurement? in the boxing system - ✔✔the least distance
between lenses
✔✔Cr-39 Abbe value - ✔✔59
✔✔The point on a lens through which a ray of light passes without deviation -
✔✔Occular center
✔✔The point in a lens within a frame where - ✔✔Geometeric center
✔✔eye inflammation, commonly known as pink eye - ✔✔Conjuctivitis
