Ophthalmic Scribe Certification (OSC)
Exam Questions And Correct Answers
(Verified Answers) Plus Rationales
2025/2026 Q&A
1. Which structure of the eye is primarily responsible for focusing
light onto the retina?
A. Cornea
B. Lens
C. Retina
D. Optic nerve
Answer: B. Lens
The lens adjusts its shape to focus light precisely onto the retina,
enabling clear vision at different distances.
2. The medical term for nearsightedness is:
A. Hyperopia
B. Presbyopia
C. Myopia
D. Astigmatism
Answer: C. Myopia
Myopia occurs when light focuses in front of the retina, causing
distant objects to appear blurry.
3. Which test measures visual acuity?
A. Tonometry
B. Visual field test
,C. Snellen chart
D. Pachymetry
Answer: C. Snellen chart
The Snellen chart is the standard test used to measure visual acuity.
4. Tonometry is used to measure:
A. Corneal thickness
B. Eye pressure
C. Tear production
D. Visual acuity
Answer: B. Eye pressure
Tonometry measures intraocular pressure (IOP), important for
diagnosing glaucoma.
5. The white part of the eye is called the:
A. Retina
B. Sclera
C. Cornea
D. Choroid
Answer: B. Sclera
The sclera is the tough outer white layer of the eye that protects
internal structures.
6. Which condition is associated with increased intraocular
pressure?
A. Cataract
B. Glaucoma
,C. Macular degeneration
D. Retinitis
Answer: B. Glaucoma
Glaucoma involves elevated intraocular pressure that can damage
the optic nerve.
7. The retina contains which cells responsible for vision?
A. Ganglion cells
B. Rods and cones
C. Bipolar cells
D. Nerve fibers
Answer: B. Rods and cones
Rods detect low light, while cones are responsible for color and
detailed vision.
8. The macula is responsible for:
A. Peripheral vision
B. Color vision
C. Central vision
D. Night vision
Answer: C. Central vision
The macula provides sharp, detailed central vision.
9. The optic nerve transmits signals from the eye to the:
A. Brain
B. Lens
C. Retina
D. Cornea
, Answer: A. Brain
The optic nerve carries visual signals to the brain for interpretation.
10. Which part of the eye controls the amount of light entering?
A. Retina
B. Lens
C. Iris
D. Macula
Answer: C. Iris
The iris adjusts pupil size to regulate light entering the eye.
11. Cataracts primarily affect which structure?
A. Retina
B. Lens
C. Cornea
D. Optic nerve
Answer: B. Lens
Cataracts occur when the lens becomes cloudy, impairing vision.
12. The term "OD" refers to which eye?
A. Both eyes
B. Left eye
C. Right eye
D. Inner eye
Answer: C. Right eye
OD stands for oculus dexter, meaning right eye.
Exam Questions And Correct Answers
(Verified Answers) Plus Rationales
2025/2026 Q&A
1. Which structure of the eye is primarily responsible for focusing
light onto the retina?
A. Cornea
B. Lens
C. Retina
D. Optic nerve
Answer: B. Lens
The lens adjusts its shape to focus light precisely onto the retina,
enabling clear vision at different distances.
2. The medical term for nearsightedness is:
A. Hyperopia
B. Presbyopia
C. Myopia
D. Astigmatism
Answer: C. Myopia
Myopia occurs when light focuses in front of the retina, causing
distant objects to appear blurry.
3. Which test measures visual acuity?
A. Tonometry
B. Visual field test
,C. Snellen chart
D. Pachymetry
Answer: C. Snellen chart
The Snellen chart is the standard test used to measure visual acuity.
4. Tonometry is used to measure:
A. Corneal thickness
B. Eye pressure
C. Tear production
D. Visual acuity
Answer: B. Eye pressure
Tonometry measures intraocular pressure (IOP), important for
diagnosing glaucoma.
5. The white part of the eye is called the:
A. Retina
B. Sclera
C. Cornea
D. Choroid
Answer: B. Sclera
The sclera is the tough outer white layer of the eye that protects
internal structures.
6. Which condition is associated with increased intraocular
pressure?
A. Cataract
B. Glaucoma
,C. Macular degeneration
D. Retinitis
Answer: B. Glaucoma
Glaucoma involves elevated intraocular pressure that can damage
the optic nerve.
7. The retina contains which cells responsible for vision?
A. Ganglion cells
B. Rods and cones
C. Bipolar cells
D. Nerve fibers
Answer: B. Rods and cones
Rods detect low light, while cones are responsible for color and
detailed vision.
8. The macula is responsible for:
A. Peripheral vision
B. Color vision
C. Central vision
D. Night vision
Answer: C. Central vision
The macula provides sharp, detailed central vision.
9. The optic nerve transmits signals from the eye to the:
A. Brain
B. Lens
C. Retina
D. Cornea
, Answer: A. Brain
The optic nerve carries visual signals to the brain for interpretation.
10. Which part of the eye controls the amount of light entering?
A. Retina
B. Lens
C. Iris
D. Macula
Answer: C. Iris
The iris adjusts pupil size to regulate light entering the eye.
11. Cataracts primarily affect which structure?
A. Retina
B. Lens
C. Cornea
D. Optic nerve
Answer: B. Lens
Cataracts occur when the lens becomes cloudy, impairing vision.
12. The term "OD" refers to which eye?
A. Both eyes
B. Left eye
C. Right eye
D. Inner eye
Answer: C. Right eye
OD stands for oculus dexter, meaning right eye.
