COT STUDY EXAM QUESTIONS AND
ANSWERS. VERIFIED 2026.
"1 year ago", "consent" "suddenly" are all examples of what component of the HPI?
A. Quality
B. Modifying Factors
C. Context
D. Timing - ANS D. Timing
1mm radius of corneal curvature equals
A. 1 D
B. 2.5 D
C. 5 D
D. 10 D - ANS C. 5 D
A +1 D lens is decentered by 10mm. What is the amount of prism inflicted by this decentered
lens?
A. 0.1 D
B. 1 D
C. 5 D
D. 10 D - ANS B. 1 D
1 @COPYRIGHT 2025/2026 ALLRIGHTS RESERVED.
,Prentice's Rule
Power(D) X Decentration (cm)= Prism (D)
1D x (10mm/10) = 1 prism diopter.
A +5D spectacle lens is decentered by 4mm. What is the amount of prism inflicted by this
decentered lens?
A. 0.5D
B. 2 D
C. 10 D
D. 20 D - ANS B. 2 D
A 0.50D lens has a focal length of
A. 0.25 meters
B. 2 meters
C. 5 meters
D. 10 meters - ANS B. 2 meters
f = .50 = 2 meters
A contact lens that doesn't center well and is uncomfortable indicates the contact lens is
A. too flat
B. too steep
C. too tight
D. just right - ANS A. too flat
A dark shadow arising from inferior VF or an ascending veil are symptoms of
A. advanced glaucoma
2 @COPYRIGHT 2025/2026 ALLRIGHTS RESERVED.
,B. cataract
C. retinal detachment
D. macular degeneration - ANS C. retinal detachment
A direct ophthalmoscope should be
A. stored with viewing lens set a zero
B. kept in the charger when not in use
C. used with the transformer set on the highest setting
D. all of the above - ANS A. stored with viewing lens set a zero
A fluorescein pattern on a contact lens wearer that shows bubbles under the contact lens
indicates the lens is
A. too flat
B. too steep
C. fit just right
D. none of the above - ANS B. too steep
A Goldmann tonometer prism should be disinfected with
A. Alcohol
B. Hydrogen Peroxide
C. Acetone
D. UV radiation - ANS B. Hydrogen Peroxide
A patient who reports they were scratched in the eye with a palm frond is MOST at risk of
developing what kind of infection?
A. bacterial
3 @COPYRIGHT 2025/2026 ALLRIGHTS RESERVED.
, B. fungal
C. viral
D. parasitic - ANS B. fungal
A patient's Shirmer's II readings are 12mm OD and 14mm OS. This indicates the patient has
A. dry eyes
B. excessive lacrimation
C. normal tear output
D. none of the above - ANS C. normal tear output
Dry eye <10mm
Normal 10-30mm
Excess >30mm
A phoria is
A. a disease involving a cranial nerve
B. associated with Myasthenia Gravis
C. normal
D. present with both eyes open - ANS C. normal
A rapid and weak pulse, skin rash, and difficulty breathing after taking a medication are signs of
A. a medication side effect
B. corticosteroid use
C. an allergic reaction
D. Bradycardia - ANS C. an allergic reaction
4 @COPYRIGHT 2025/2026 ALLRIGHTS RESERVED.
ANSWERS. VERIFIED 2026.
"1 year ago", "consent" "suddenly" are all examples of what component of the HPI?
A. Quality
B. Modifying Factors
C. Context
D. Timing - ANS D. Timing
1mm radius of corneal curvature equals
A. 1 D
B. 2.5 D
C. 5 D
D. 10 D - ANS C. 5 D
A +1 D lens is decentered by 10mm. What is the amount of prism inflicted by this decentered
lens?
A. 0.1 D
B. 1 D
C. 5 D
D. 10 D - ANS B. 1 D
1 @COPYRIGHT 2025/2026 ALLRIGHTS RESERVED.
,Prentice's Rule
Power(D) X Decentration (cm)= Prism (D)
1D x (10mm/10) = 1 prism diopter.
A +5D spectacle lens is decentered by 4mm. What is the amount of prism inflicted by this
decentered lens?
A. 0.5D
B. 2 D
C. 10 D
D. 20 D - ANS B. 2 D
A 0.50D lens has a focal length of
A. 0.25 meters
B. 2 meters
C. 5 meters
D. 10 meters - ANS B. 2 meters
f = .50 = 2 meters
A contact lens that doesn't center well and is uncomfortable indicates the contact lens is
A. too flat
B. too steep
C. too tight
D. just right - ANS A. too flat
A dark shadow arising from inferior VF or an ascending veil are symptoms of
A. advanced glaucoma
2 @COPYRIGHT 2025/2026 ALLRIGHTS RESERVED.
,B. cataract
C. retinal detachment
D. macular degeneration - ANS C. retinal detachment
A direct ophthalmoscope should be
A. stored with viewing lens set a zero
B. kept in the charger when not in use
C. used with the transformer set on the highest setting
D. all of the above - ANS A. stored with viewing lens set a zero
A fluorescein pattern on a contact lens wearer that shows bubbles under the contact lens
indicates the lens is
A. too flat
B. too steep
C. fit just right
D. none of the above - ANS B. too steep
A Goldmann tonometer prism should be disinfected with
A. Alcohol
B. Hydrogen Peroxide
C. Acetone
D. UV radiation - ANS B. Hydrogen Peroxide
A patient who reports they were scratched in the eye with a palm frond is MOST at risk of
developing what kind of infection?
A. bacterial
3 @COPYRIGHT 2025/2026 ALLRIGHTS RESERVED.
, B. fungal
C. viral
D. parasitic - ANS B. fungal
A patient's Shirmer's II readings are 12mm OD and 14mm OS. This indicates the patient has
A. dry eyes
B. excessive lacrimation
C. normal tear output
D. none of the above - ANS C. normal tear output
Dry eye <10mm
Normal 10-30mm
Excess >30mm
A phoria is
A. a disease involving a cranial nerve
B. associated with Myasthenia Gravis
C. normal
D. present with both eyes open - ANS C. normal
A rapid and weak pulse, skin rash, and difficulty breathing after taking a medication are signs of
A. a medication side effect
B. corticosteroid use
C. an allergic reaction
D. Bradycardia - ANS C. an allergic reaction
4 @COPYRIGHT 2025/2026 ALLRIGHTS RESERVED.
