Ace the ABO Ophthalmology Challenge 2025 – See Your Future Shine!

Lensometers are essential instruments used in the field of optometry and ophthalmology for measuring the power of lenses, including both plus and minus lenses. The correct statement highlights the importance of proper calibration in ensuring that the readings obtained from the lensometer are accurate. Calibration is vital because it accounts for any potential discrepancies in the device and the specific measurements it provides. Without accurate calibration, the readings may lead to incorrect prescriptions or fitting of glasses, negatively impacting patient vision.

In contrast, while lensometers certainly can measure both plus and minus lenses, they are not limited to only one type of lens. They also do not measure only the thickness of lenses; rather, they determine the optical power of the lenses. Furthermore, while lensometers can be helpful in fitting adjustments, their primary function is to ascertain the prescription of the lenses rather than serving solely for spectacle fitting. Thus, proper calibration is crucial to ensure the lensometer functions correctly, making that statement the most accurate regarding its use.