Contact Lens 2 Final Exam With
Verified Correct Solutions -26/7
Which type of saline causes the least problems? - Ans--unit dose non-
preserved
What is the primary function of a surfactant cleaner? - Ans--remove loosely
adherent debris from the lens surface
The average pH value of human tears is? - Ans--7.0-7.4
Upon delivery the wearer should be told to: - Ans--to remove a lens which
becomes uncomfortable
Which of the following disinfecting solutions would you recommend to a
patient with a history or allergic reactions? - Ans--hydrogen peroxide
Ingredients added to contact lens solutions to protect them from spoilage
after being opened are called: - Ans--preservatives
Which of the following is most effective in removing protein buildup on soft
contact lenses? - Ans--enzymatic cleaner
Which preservatives is a mercury based compound? - Ans--thimerosal
A buffering agent is added to a solution to help control: - Ans--pH level
Which of the following care systems would result in the shorted life for a soft
lens? - Ans--heat
When lenses are delivered to the patient, the wearing schedule should be: -
Ans--verbal and written
, All of the following are functions of a soaking solution except - Ans--it
dissolves excess silicone molecules
Studies have shown that as high as __ of compliant contact lens patients
have contact lens cases that culture positive. - Ans--42
All of the following are functions of a wetting solution except: - Ans--it cleans
the lens after removal
Why shouldn't different brands of soft contact lens solutions be mixed? -
Ans--a chemical reaction may occur causing corneal problems
___ of patients are non-compliant when it comes to contact lenses - Ans--
75%
____ can bind to proteins on the contact lens and become concentrated
enough to cause corneal sensitivity. - Ans--chlorhexidine
A yellowish or brownish discoloration has been associated with this
preservative. - Ans--sorbic acid
Wetting solutions enhance wetting by making the lens more? - Ans--
hydrophilic
Which of the following should a fitter do when a significant foreign body stain
on the cornea is observed during a rigid contact lens follow up visit? - Ans--
consult the prescriber
Bubbles trapped under a rigid lens may result in ____. - Ans--dimple veiling
A patient complains that the contact lens in his right eye is irritating. Upon slit
lamp examination you discover an embedded foreign body. You should: -
Ans--send the patient to a doctor
If fogging occures immediately upon insertion of a contact lens: - Ans--the
lenses were not cleaned properly
Verified Correct Solutions -26/7
Which type of saline causes the least problems? - Ans--unit dose non-
preserved
What is the primary function of a surfactant cleaner? - Ans--remove loosely
adherent debris from the lens surface
The average pH value of human tears is? - Ans--7.0-7.4
Upon delivery the wearer should be told to: - Ans--to remove a lens which
becomes uncomfortable
Which of the following disinfecting solutions would you recommend to a
patient with a history or allergic reactions? - Ans--hydrogen peroxide
Ingredients added to contact lens solutions to protect them from spoilage
after being opened are called: - Ans--preservatives
Which of the following is most effective in removing protein buildup on soft
contact lenses? - Ans--enzymatic cleaner
Which preservatives is a mercury based compound? - Ans--thimerosal
A buffering agent is added to a solution to help control: - Ans--pH level
Which of the following care systems would result in the shorted life for a soft
lens? - Ans--heat
When lenses are delivered to the patient, the wearing schedule should be: -
Ans--verbal and written
, All of the following are functions of a soaking solution except - Ans--it
dissolves excess silicone molecules
Studies have shown that as high as __ of compliant contact lens patients
have contact lens cases that culture positive. - Ans--42
All of the following are functions of a wetting solution except: - Ans--it cleans
the lens after removal
Why shouldn't different brands of soft contact lens solutions be mixed? -
Ans--a chemical reaction may occur causing corneal problems
___ of patients are non-compliant when it comes to contact lenses - Ans--
75%
____ can bind to proteins on the contact lens and become concentrated
enough to cause corneal sensitivity. - Ans--chlorhexidine
A yellowish or brownish discoloration has been associated with this
preservative. - Ans--sorbic acid
Wetting solutions enhance wetting by making the lens more? - Ans--
hydrophilic
Which of the following should a fitter do when a significant foreign body stain
on the cornea is observed during a rigid contact lens follow up visit? - Ans--
consult the prescriber
Bubbles trapped under a rigid lens may result in ____. - Ans--dimple veiling
A patient complains that the contact lens in his right eye is irritating. Upon slit
lamp examination you discover an embedded foreign body. You should: -
Ans--send the patient to a doctor
If fogging occures immediately upon insertion of a contact lens: - Ans--the
lenses were not cleaned properly
