When do I get faulty or no measurement results with the keratometer?
• the instrument is not properly focused on the eye • measuring marks are partly obscured by eyelid or eyelashes • the eye is being closed during the measurement • strong reflections are additionally produced at the anterior surface of the IOL with pseudophakic eyes • the anterior surface of the cornea is affected by scars, local or other irregularities • the tear film is strongly impaired
Related Questions
- How do you decide when measurement results are "bad enough" (variation between plans and actuals) to merit further investigation or corrective action?
- How long are field measurement locations and results valid since it may not be possible to archive samples and locations may not be protected?
- Where do I see the Measurement Machine response time results?
