Clinical Procedures Flashcards
7 cards from real CPOA practice questions. Tap to flip, then mark Knew It or Still Learning — missed cards come back until you master them.
Read the first 7 Clinical Procedures flashcards as text
When performing keratometry, which measurement is recorded?
Answer: Corneal curvature
Keratometry measures the curvature of the anterior corneal surface, expressed in millimeters or diopters.
A patient's visual acuity is recorded as 20/40. This means the patient sees at 20 feet what a person with normal vision sees at:
Answer: 40 feet
The denominator in Snellen notation indicates the distance at which a person with normal vision can read the same line.
Which instrument is used to measure intraocular pressure by applanation?
Answer: Goldmann tonometer
The Goldmann applanation tonometer is the gold standard for measuring IOP by flattening a fixed area of the cornea.
During lensometry, the optician neutralizes the lens power by aligning which targets?
Answer: Sphere crosses and cylinder lines
In manual lensometry, the sphere is neutralized when the sphere crosses are clear, and cylinder is neutralized when the cylinder lines are clear.
What is the purpose of instilling a topical anesthetic before Goldmann tonometry?
Answer: To reduce patient discomfort and prevent blinking
Topical anesthetics numb the cornea so the patient tolerates contact from the tonometer tip without reflexive blinking.
A cover-uncover test is primarily used to detect:
Answer: Strabismus
The cover-uncover test reveals a tropia (manifest deviation) by observing movement of the uncovered eye when the fellow eye is covered.
When using a Burton lamp for contact lens evaluation, which light source is used?
Answer: Ultraviolet (black light)
A Burton lamp emits ultraviolet light, which causes sodium fluorescein dye on the cornea or contact lens to fluoresce.