NCLE 2025 REAL PRACTICE TEST QUESTIONS WITH ACCURATE SOLUTIONS
The rate at which oxygen passes through a specific contact lens of a given thickness
Oxygen transmissibility
At a 36.00D curve on the keratometer measures approximately ____mm chord of the
cornea.
a. 4mm
b. 8mm
c. 3mm
d. 1mm
a. 4mm
The keratometer measure a point within the cornea called the
Visual center
The major drawback of contact lens materials containing silicone is
Wettability
Which of the following parameter changes can be made to the original lens?
,a. widen peripheral curves
b. change CPC
c. make POZ larger
d. change C.T.
a. widen peripheral curves
Patients should clean lenses with a surfactant cleaner
After removal
When keratometric mires reflected off a soft lens are only clear when the wearer blinks, the
lens fit is too:
a. small
b. large
c. tight
d. loose
C. Tight
What preservative, found in gas perm solutions, can cause serious problems for uses of
soft contact lenses?
a. Dymed
b. Thimersoal
, c. Benzylkonium chloride
d. Sodium borate
C. Benzylkonium chloride
What is the abbreviation for fluorescein?
NaFl
What type of dye can be used with soft lenses that have less than 55% water content?
a. Fluorescein
b. Fluorosoft
c. Rose Bengal
d. none of thsese
b. Fluorosoft
The material safety data sheets (MSDS)
List procedures to be followed in the event of contact with potentially harmful chemicals
RGP lenses should soak for a minimum of _____ hours for disinfection to take place.
a. 6hrs
b. 4hrs
The rate at which oxygen passes through a specific contact lens of a given thickness
Oxygen transmissibility
At a 36.00D curve on the keratometer measures approximately ____mm chord of the
cornea.
a. 4mm
b. 8mm
c. 3mm
d. 1mm
a. 4mm
The keratometer measure a point within the cornea called the
Visual center
The major drawback of contact lens materials containing silicone is
Wettability
Which of the following parameter changes can be made to the original lens?
,a. widen peripheral curves
b. change CPC
c. make POZ larger
d. change C.T.
a. widen peripheral curves
Patients should clean lenses with a surfactant cleaner
After removal
When keratometric mires reflected off a soft lens are only clear when the wearer blinks, the
lens fit is too:
a. small
b. large
c. tight
d. loose
C. Tight
What preservative, found in gas perm solutions, can cause serious problems for uses of
soft contact lenses?
a. Dymed
b. Thimersoal
, c. Benzylkonium chloride
d. Sodium borate
C. Benzylkonium chloride
What is the abbreviation for fluorescein?
NaFl
What type of dye can be used with soft lenses that have less than 55% water content?
a. Fluorescein
b. Fluorosoft
c. Rose Bengal
d. none of thsese
b. Fluorosoft
The material safety data sheets (MSDS)
List procedures to be followed in the event of contact with potentially harmful chemicals
RGP lenses should soak for a minimum of _____ hours for disinfection to take place.
a. 6hrs
b. 4hrs
