COA Flashcards - Keratometry 3% of exam
0
Q
Keratometry is performed with a device called a _____ .
A
Keratometer or ophthalmometer
1
Q
What is the technique used to measure the radius of curvature of the anterior corneal surface?
A
A-Scan Keratometry Length Measurements
2
Q
Give three examples in which a keratometry measurement would be useful.
A
Contact lens fitting, refractive surgery, intra ocular lens calculation, keratoconus
3
Q
Keratometry is measured in _____ .
A
Diopters
4
Q
An unfocused eyepiece can lead to an error of _____ .
A
1 diopter in the K reading
5
Q
How many meridians are measured in keratometry?
A
2 meridians (usually 90 degrees apart)
6
Q
The average K reading is _____ .
A
43 to 44 diopters
7
Q
Keratometry measures the _____ of the anterior curvature of the cornea.
A
Central 3.3 mm
