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Wht is the technique used to measure the radius of curvature of the anterior corneal surface?
A-scan Keratometry Length Measurements
Keratometry is performed with a device called a ____.
Keratometer or Ophthalmometer
Give 3 ex in which keratometry measurement would be useful.
CL fitting, refractive sx, intra ocular lens calc, keratoconus
Keratometry is measured in _____.
An unfocused eyepiece can lead to an error of ____.
1 diopter in the K reading
How many meridians are measured in keratometry?
2 meridians (usually 90 degrees apart)
The average K reading is ____.
Keratometry measures the _____ of the anterior curvature of the cornea.
central 3.3 mm
ophthlamic assistant review