Optician ABO Exam - Module 1 with all Correct & 100%
Verified Answers |Actual Complete Update |Already
Graded A+
Fibrous tunic ✔Correct Answer-outside layer comprised of the sclera and the cornea
Vascular tunic ✔Correct Answer-middle layer comprised of the iris, choroid, and ciliary body
Nervous tunic ✔Correct Answer-interior layer comprised of photoreceptors and neurons
Anterior chamber ✔Correct Answer-between the cornea and iris
Posterior chamber ✔Correct Answer-between iris and lens
Vitreous chamber ✔Correct Answer-between retina and lens and filled with vitreous humor.
Rods vs Cones ✔Correct Answer-● Rods help in low lighting situations
● Cones are used to see color
● The tissue with rods and cones is called the Macula. Only 5mm big but responsible for our
central vision.
● There are 120 million rods and 6 million cones
(blank) allows you to see in low lighting situations. (blank) allows you to see color. ✔Correct
Answer-(Rods) allows you to see in low lighting situations. (Cones) allows you to see color.
There are 120 million (blank) and 6 million (blank) in the eye. ✔Correct Answer-There are 120
million (Rods) and 6 million (Cones) in the eye.
The Cornea is comprised of 5 layers ✔Correct Answer-In order from outermost layer
● Epithelium
● Bowman's Membrane
● Stroma
● Descemet's Membrane
● Endothelium
Helpful tips to remember order:
- EPI- means top/above. ENDO means end
- Then remember your alphabetB-Bowman D-Descemet's
- Stroma -smack in the middle
, crystalline lens ✔Correct Answer-The crystalline lens is located behind the iris and helps focus
light on the retina. Think of it as the eyes camera lens
The process of focusing is called ✔Correct Answer-accomodation
The total optical power of the relaxed eye is approximately ✔Correct Answer-63 diopters
The (?) accounts for approximately 2/3 of this refractive power (? dioptres) and the (?)
contributes the remaining 1/3 (about ? diopters). ✔Correct Answer-The (cornea) accounts for
approximately 2/3 of this refractive power (43 dioptres) and the crystalline lens contributes the
remaining 1/3 (about 20 dioptres). It is very important to remember the powers of the cornea
and crystalline lens
fibrous white layer of the eye ✔Correct Answer-sclera
drains the aqueous humor ✔Correct Answer-Canal of Schlemm
aligns light entering the eye onto the retina ✔Correct Answer-Lens (Crystalline Lens)
clear lens that covers the iris; has no blood supply and gets its oxygen from the air ✔Correct
Answer-cornea
the hole that allows light to enter the eye and is controlled by the iris changing size ✔Correct
Answer-pupil
colored area under the cornea that controls how much light is entering the eye ✔Correct
Answer-iris
attached to the lens and controls the shape to focus light ✔Correct Answer-zonules
Ciliary Body ✔Correct Answer-The ciliary body is a circular structure that is an extension of
the iris, the colored part of the eye. The ciliary body produces the fluid in the eye called
aqueous humor. It also contains the ciliary muscle, which changes the shape of the lens when
your eyes focus on a near object. This process is called accommodation.
vascular layer of the eye, containing connective tissues, and lying between the retina and sclera
✔Correct Answer-Choroid
Located in the center of the retina, it's responsible for giving us clear vision and the ability to
see fine detail ✔Correct Answer-Macula
responsible for sharp central vision, which is necessary in humans for reading, driving, and any
activity where visual detail is important ✔Correct Answer-Fovea
Verified Answers |Actual Complete Update |Already
Graded A+
Fibrous tunic ✔Correct Answer-outside layer comprised of the sclera and the cornea
Vascular tunic ✔Correct Answer-middle layer comprised of the iris, choroid, and ciliary body
Nervous tunic ✔Correct Answer-interior layer comprised of photoreceptors and neurons
Anterior chamber ✔Correct Answer-between the cornea and iris
Posterior chamber ✔Correct Answer-between iris and lens
Vitreous chamber ✔Correct Answer-between retina and lens and filled with vitreous humor.
Rods vs Cones ✔Correct Answer-● Rods help in low lighting situations
● Cones are used to see color
● The tissue with rods and cones is called the Macula. Only 5mm big but responsible for our
central vision.
● There are 120 million rods and 6 million cones
(blank) allows you to see in low lighting situations. (blank) allows you to see color. ✔Correct
Answer-(Rods) allows you to see in low lighting situations. (Cones) allows you to see color.
There are 120 million (blank) and 6 million (blank) in the eye. ✔Correct Answer-There are 120
million (Rods) and 6 million (Cones) in the eye.
The Cornea is comprised of 5 layers ✔Correct Answer-In order from outermost layer
● Epithelium
● Bowman's Membrane
● Stroma
● Descemet's Membrane
● Endothelium
Helpful tips to remember order:
- EPI- means top/above. ENDO means end
- Then remember your alphabetB-Bowman D-Descemet's
- Stroma -smack in the middle
, crystalline lens ✔Correct Answer-The crystalline lens is located behind the iris and helps focus
light on the retina. Think of it as the eyes camera lens
The process of focusing is called ✔Correct Answer-accomodation
The total optical power of the relaxed eye is approximately ✔Correct Answer-63 diopters
The (?) accounts for approximately 2/3 of this refractive power (? dioptres) and the (?)
contributes the remaining 1/3 (about ? diopters). ✔Correct Answer-The (cornea) accounts for
approximately 2/3 of this refractive power (43 dioptres) and the crystalline lens contributes the
remaining 1/3 (about 20 dioptres). It is very important to remember the powers of the cornea
and crystalline lens
fibrous white layer of the eye ✔Correct Answer-sclera
drains the aqueous humor ✔Correct Answer-Canal of Schlemm
aligns light entering the eye onto the retina ✔Correct Answer-Lens (Crystalline Lens)
clear lens that covers the iris; has no blood supply and gets its oxygen from the air ✔Correct
Answer-cornea
the hole that allows light to enter the eye and is controlled by the iris changing size ✔Correct
Answer-pupil
colored area under the cornea that controls how much light is entering the eye ✔Correct
Answer-iris
attached to the lens and controls the shape to focus light ✔Correct Answer-zonules
Ciliary Body ✔Correct Answer-The ciliary body is a circular structure that is an extension of
the iris, the colored part of the eye. The ciliary body produces the fluid in the eye called
aqueous humor. It also contains the ciliary muscle, which changes the shape of the lens when
your eyes focus on a near object. This process is called accommodation.
vascular layer of the eye, containing connective tissues, and lying between the retina and sclera
✔Correct Answer-Choroid
Located in the center of the retina, it's responsible for giving us clear vision and the ability to
see fine detail ✔Correct Answer-Macula
responsible for sharp central vision, which is necessary in humans for reading, driving, and any
activity where visual detail is important ✔Correct Answer-Fovea
