CPSS TEST- OPHTHALMOLOGY FINAL EXAM 200 ACTUAL
QUESTIONS AND CORRECT ANSWERS WITH RATIONALE
LATEST 2026 ASSURED PASS
This comprehensive CPSS Test-Ophthalmology exam guide features 200
unique, exam-style multiple-choice questions with detailed rationales covering
all essential ophthalmic knowledge areas. Topics include corneal anatomy and
pathology, glaucoma, cataracts, retinal disorders (diabetic retinopathy,
macular degeneration, retinal detachment), uveitis, neuro-ophthalmology,
ocular trauma, pediatric ophthalmology, ocular oncology, and infectious
diseases. Each question emphasizes clinical presentation, diagnostic testing,
treatment options, and complication management. Designed for medical
students, residents, and ophthalmology professionals preparing for CPSS
certification, this resource reinforces the critical thinking and clinical
reasoning required for ophthalmic practice.
1. A patient purchased a pair of sunglasses with a dark blue tint. Which of these
colours would be the hardest to see?
A) Red
B) Blue
C) Green
D) Purple
Answer: A
Rationale: Dark blue-tinted sunglasses would filter out or significantly reduce blue
light. Since red contains no blue light, it would be the hardest to see.
2. Which of the following is the most accurate method for measuring intraocular
pressure (IOP)?
A) Digital tonometry
B) Applanation tonometry
C) Gonioscopy
D) Campimetry
Answer: B
Rationale: Applanation tonometry is the most accurate method for measuring IOP.
It measures the force required to flatten a specific area of the cornea, based on the
Imbert-Fick law.
,3. What is the primary function of the ciliary body?
A) To regulate the amount of light entering the eye
B) To provide the main refractive power of the eye
C) To produce aqueous humor and enable accommodation
D) To transmit visual signals from the retina to the brain
Answer: C
Rationale: The ciliary body produces aqueous humor and contains the ciliary
muscle, which changes the shape of the lens for accommodation.
4. What is the innermost layer of the cornea called?
A) Epithelium
B) Bowman's membrane
C) Stroma
D) Endothelium
Answer: D
Rationale: The corneal endothelium is the innermost layer. It is a single layer of
cells responsible for maintaining corneal deturgescence and transparency by
pumping fluid out of the stroma.
5. What is the name of the clear, gel-like substance that fills the posterior chamber
of the eye?
A) Aqueous humor
B) Vitreous humor
C) Lacrimal fluid
D) Intraocular fluid
Answer: B
Rationale: The vitreous humor is the clear, gel-like substance that fills the posterior
chamber (vitreous cavity) of the eye, maintaining its shape.
6. Which of the following is a symptom of acute angle-closure glaucoma?
A) Gradual loss of peripheral vision
B) Severe headache and eye pain
C) Floaters and flashes of light
D) Double vision
Answer: B
Rationale: Acute angle-closure glaucoma presents with sudden, severe eye pain,
headache, nausea, vomiting, blurred vision, and halos around lights. Gradual
peripheral vision loss is a symptom of chronic open-angle glaucoma.
,7. Which extraocular muscle is innervated by the trochlear nerve (CN IV)?
A) Lateral rectus
B) Superior rectus
C) Superior oblique
D) Inferior oblique
Answer: C
Rationale: The trochlear nerve (CN IV) innervates the superior oblique muscle.
The superior oblique muscle's primary action is intorsion and depression of the
eye.
8. What is the medical term for farsightedness?
A) Myopia
B) Hyperopia
C) Astigmatism
D) Presbyopia
Answer: B
Rationale: Hyperopia is the medical term for farsightedness, where light focuses
behind the retina due to the eyeball being too short or the cornea being too flat.
9. Which test is used to evaluate the drainage angle of the eye?
A) Ophthalmoscopy
B) Gonioscopy
C) Perimetry
D) Tonometry
Answer: B
Rationale: Gonioscopy is a specialized test that uses a mirrored lens to visualize
the iridocorneal angle, allowing the clinician to determine if the angle is open,
narrow, or closed.
10. Which of the following is the most common type of cataract?
A) Nuclear sclerotic cataract
B) Cortical cataract
C) Subcapsular cataract
D) Congenital cataract
Answer: A
Rationale: Nuclear sclerotic cataracts are the most common type, typically
associated with aging. They involve the central nucleus of the lens.
11. The fovea is a depression in which part of the eye?
A) Optic nerve
, B) Retina
C) Lens
D) Cornea
Answer: B
Rationale: The fovea is a small depression in the center of the macula of the retina.
It is responsible for sharp, central vision.
12. Which of the following is a contraindication for contact lens use?
A) Myopia
B) Dry eye syndrome
C) Astigmatism
D) Presbyopia
Answer: B
Rationale: Dry eye syndrome is a relative contraindication for contact lens wear as
lenses can exacerbate dryness, leading to discomfort, infection, and corneal
damage.
13. What is the most common cause of blindness in the world?
A) Glaucoma
B) Diabetic retinopathy
C) Macular degeneration
D) Cataracts
Answer: D
Rationale: Cataracts are the leading cause of blindness worldwide, particularly in
developing countries where access to surgical intervention is limited.
14. Which laser is used for photocoagulation in diabetic retinopathy?
A) Excimer laser
B) Argon laser
C) Nd:YAG laser
D) Femtosecond laser
Answer: B
Rationale: The argon laser is commonly used for photocoagulation to treat diabetic
retinopathy and other retinal diseases by creating burns to seal leaking blood
vessels.
15. What is the most common type of glaucoma?
A) Primary open-angle glaucoma
B) Angle-closure glaucoma
C) Secondary glaucoma
QUESTIONS AND CORRECT ANSWERS WITH RATIONALE
LATEST 2026 ASSURED PASS
This comprehensive CPSS Test-Ophthalmology exam guide features 200
unique, exam-style multiple-choice questions with detailed rationales covering
all essential ophthalmic knowledge areas. Topics include corneal anatomy and
pathology, glaucoma, cataracts, retinal disorders (diabetic retinopathy,
macular degeneration, retinal detachment), uveitis, neuro-ophthalmology,
ocular trauma, pediatric ophthalmology, ocular oncology, and infectious
diseases. Each question emphasizes clinical presentation, diagnostic testing,
treatment options, and complication management. Designed for medical
students, residents, and ophthalmology professionals preparing for CPSS
certification, this resource reinforces the critical thinking and clinical
reasoning required for ophthalmic practice.
1. A patient purchased a pair of sunglasses with a dark blue tint. Which of these
colours would be the hardest to see?
A) Red
B) Blue
C) Green
D) Purple
Answer: A
Rationale: Dark blue-tinted sunglasses would filter out or significantly reduce blue
light. Since red contains no blue light, it would be the hardest to see.
2. Which of the following is the most accurate method for measuring intraocular
pressure (IOP)?
A) Digital tonometry
B) Applanation tonometry
C) Gonioscopy
D) Campimetry
Answer: B
Rationale: Applanation tonometry is the most accurate method for measuring IOP.
It measures the force required to flatten a specific area of the cornea, based on the
Imbert-Fick law.
,3. What is the primary function of the ciliary body?
A) To regulate the amount of light entering the eye
B) To provide the main refractive power of the eye
C) To produce aqueous humor and enable accommodation
D) To transmit visual signals from the retina to the brain
Answer: C
Rationale: The ciliary body produces aqueous humor and contains the ciliary
muscle, which changes the shape of the lens for accommodation.
4. What is the innermost layer of the cornea called?
A) Epithelium
B) Bowman's membrane
C) Stroma
D) Endothelium
Answer: D
Rationale: The corneal endothelium is the innermost layer. It is a single layer of
cells responsible for maintaining corneal deturgescence and transparency by
pumping fluid out of the stroma.
5. What is the name of the clear, gel-like substance that fills the posterior chamber
of the eye?
A) Aqueous humor
B) Vitreous humor
C) Lacrimal fluid
D) Intraocular fluid
Answer: B
Rationale: The vitreous humor is the clear, gel-like substance that fills the posterior
chamber (vitreous cavity) of the eye, maintaining its shape.
6. Which of the following is a symptom of acute angle-closure glaucoma?
A) Gradual loss of peripheral vision
B) Severe headache and eye pain
C) Floaters and flashes of light
D) Double vision
Answer: B
Rationale: Acute angle-closure glaucoma presents with sudden, severe eye pain,
headache, nausea, vomiting, blurred vision, and halos around lights. Gradual
peripheral vision loss is a symptom of chronic open-angle glaucoma.
,7. Which extraocular muscle is innervated by the trochlear nerve (CN IV)?
A) Lateral rectus
B) Superior rectus
C) Superior oblique
D) Inferior oblique
Answer: C
Rationale: The trochlear nerve (CN IV) innervates the superior oblique muscle.
The superior oblique muscle's primary action is intorsion and depression of the
eye.
8. What is the medical term for farsightedness?
A) Myopia
B) Hyperopia
C) Astigmatism
D) Presbyopia
Answer: B
Rationale: Hyperopia is the medical term for farsightedness, where light focuses
behind the retina due to the eyeball being too short or the cornea being too flat.
9. Which test is used to evaluate the drainage angle of the eye?
A) Ophthalmoscopy
B) Gonioscopy
C) Perimetry
D) Tonometry
Answer: B
Rationale: Gonioscopy is a specialized test that uses a mirrored lens to visualize
the iridocorneal angle, allowing the clinician to determine if the angle is open,
narrow, or closed.
10. Which of the following is the most common type of cataract?
A) Nuclear sclerotic cataract
B) Cortical cataract
C) Subcapsular cataract
D) Congenital cataract
Answer: A
Rationale: Nuclear sclerotic cataracts are the most common type, typically
associated with aging. They involve the central nucleus of the lens.
11. The fovea is a depression in which part of the eye?
A) Optic nerve
, B) Retina
C) Lens
D) Cornea
Answer: B
Rationale: The fovea is a small depression in the center of the macula of the retina.
It is responsible for sharp, central vision.
12. Which of the following is a contraindication for contact lens use?
A) Myopia
B) Dry eye syndrome
C) Astigmatism
D) Presbyopia
Answer: B
Rationale: Dry eye syndrome is a relative contraindication for contact lens wear as
lenses can exacerbate dryness, leading to discomfort, infection, and corneal
damage.
13. What is the most common cause of blindness in the world?
A) Glaucoma
B) Diabetic retinopathy
C) Macular degeneration
D) Cataracts
Answer: D
Rationale: Cataracts are the leading cause of blindness worldwide, particularly in
developing countries where access to surgical intervention is limited.
14. Which laser is used for photocoagulation in diabetic retinopathy?
A) Excimer laser
B) Argon laser
C) Nd:YAG laser
D) Femtosecond laser
Answer: B
Rationale: The argon laser is commonly used for photocoagulation to treat diabetic
retinopathy and other retinal diseases by creating burns to seal leaking blood
vessels.
15. What is the most common type of glaucoma?
A) Primary open-angle glaucoma
B) Angle-closure glaucoma
C) Secondary glaucoma
