Lens Meter

A lens meter, also known as a lensometer or focimeter, is an optical instrument used to verify the power and optical center of eyeglass lenses. It is an essential tool in any optical laboratory and dispensary, ensuring that the lenses made for your glasses match your prescription exactly. The lens meter measures sphere power, cylinder power, cylinder axis, and optical center location — all critical parameters for comfortable, clear vision through your spectacles.

The procedure is simple and takes only a few minutes. The optician places your glasses in the lens meter, aligns the lens with the instrument's optical path, and reads the measurements from the display. The device can measure single-vision lenses, bifocals, progressive lenses, and even contact lenses. It can also identify the type of lens material and coatings, and verify whether the lenses meet the specifications of your prescription.

Lens meters are used for multiple purposes in eye care. When you receive new glasses, the optician verifies that the lenses were manufactured correctly before dispensing them to you. If you are having trouble with your current glasses, the lens meter can check whether the prescription was made accurately or if the lenses have been damaged. For patients bringing in existing glasses, the lens meter can read the prescription from the lenses, which is helpful if you have lost your prescription or need replacement lenses.

In our optic department, the lens meter is also used to verify the accuracy of lenses cut and fitted into frames, ensuring proper alignment of the optical centers with your pupils. Misaligned optical centers can cause eye strain, headaches, and distorted vision, so this verification step is crucial for your visual comfort.

At International Eye Hospital, every pair of glasses is verified with our precision lens meter before delivery, guaranteeing that your spectacles meet the highest standards of optical accuracy and quality.