ABO CERTIFICATION EXAMINATION TEST
VERIFIED QUESTIONS AND SOLUTIONS
GRADED A+
●● The vascular tunic consists of
Answer: Iris, choroid, ciliary body
●● The nervous tunic consists of
Answer: the inner layer of photoreceptors and neurons which consists of
the retina
●● Rods
Answer: Photoreceptors that do not discriminate between colors of light.
Allow as to see at twilight and dimly lit rooms. There are about 120
million rods around the outside of the retina.
●● Cones
Answer: Photoreceptors that discriminate between colors. Requires more
light to function. There are about 6 million cones near the center of the
macula. The highest concentration of cones is found at the fovea-the
center of the macula.
●● Macula
, Answer: Where light is focused (in a healthy eye). The center is called
the fovea.
●● Optic disc
Answer: The point where the optic nerve enters the eye. This point does
not have receptor cells so is often referred to as a blind spot.
●● The eye contains
Answer: Three fluid filled chambers-the anterior, posterior, and vitreous
chambers.
●● The anterior chamber
Answer: is between the cornea and the iris. Contains a fluid called
aqueous humor.
●● The posterior chamber
Answer: is between the iris and the lens. Contains aqueous humor.
●● Aqueous humor
Answer: Is present in the anterior and posterior chambers. It is a watery
fluid and produced by the ciliary body and constantly drained through
the Canal of Schlemm. It maintains IOP pressure and provides nutrients
to the lens and cornea.
VERIFIED QUESTIONS AND SOLUTIONS
GRADED A+
●● The vascular tunic consists of
Answer: Iris, choroid, ciliary body
●● The nervous tunic consists of
Answer: the inner layer of photoreceptors and neurons which consists of
the retina
●● Rods
Answer: Photoreceptors that do not discriminate between colors of light.
Allow as to see at twilight and dimly lit rooms. There are about 120
million rods around the outside of the retina.
●● Cones
Answer: Photoreceptors that discriminate between colors. Requires more
light to function. There are about 6 million cones near the center of the
macula. The highest concentration of cones is found at the fovea-the
center of the macula.
●● Macula
, Answer: Where light is focused (in a healthy eye). The center is called
the fovea.
●● Optic disc
Answer: The point where the optic nerve enters the eye. This point does
not have receptor cells so is often referred to as a blind spot.
●● The eye contains
Answer: Three fluid filled chambers-the anterior, posterior, and vitreous
chambers.
●● The anterior chamber
Answer: is between the cornea and the iris. Contains a fluid called
aqueous humor.
●● The posterior chamber
Answer: is between the iris and the lens. Contains aqueous humor.
●● Aqueous humor
Answer: Is present in the anterior and posterior chambers. It is a watery
fluid and produced by the ciliary body and constantly drained through
the Canal of Schlemm. It maintains IOP pressure and provides nutrients
to the lens and cornea.
