Ace the COT Challenge 2025 – Shine Bright as a Certified Ophthalmic Technician!

Question: 1 / 400

The Geneva lens clock is used to measure what aspect of a spectacle lens?

The weight of the lens

The surface curvature of the lens

The Geneva lens clock is specifically designed to measure the surface curvature of spectacle lenses. This tool employs a system of pins that contact the front and back surfaces of the lens. When the clock is pressed against the lens, it takes precise measurements of the curvature, which is crucial for fitting lenses correctly into frames and ensuring optimal optical performance.

Understanding that the curvature of the lens influences various aspects of vision correction, such as magnification and field of view, highlights the importance of accurate measurements. This capability of the Geneva lens clock is essential for opticians and ophthalmic technicians in providing patients with the best possible vision solutions. Other aspects like weight, refractive index, and tint do not relate to the primary function of this particular instrument, which is solely focused on assessing curvature.

Get further explanation with Examzify DeepDiveBeta

The refractive index of the lens

The tint of the lens

Next Question

Report this question

Download Certified Ophthalmic Technician (COT) Practice Test PDF Study Guide
Subscribe

Get the latest from Examzify

You can unsubscribe at any time. Read our privacy policy