The American Optician

Summer 2017

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1 6 • Brand security • Guaranteed sell-through • Sold only through independent ECPs • One rep for all brands • Lifetime warranties 800.621.4108 e y e w e a r T he two fundamental tasks opticians perform with a lensometer multiple times nearly every day are neutralizing eyeglass lenses and verifying the power of eyeglass lenses before dispensing them to the patient. At first glance, these two processes seem very similar, but they are actually quite different. Neutralizing is a hunting exercise, while verification is a validating exercise. Once you understand the fundamental difference between these two concepts, you'll always use the right technique for the lens power reading job before you. Of course, the first thing you do whenever you use a lensometer is to focus the eyepiece . You do this to ensure that the lensometer's reading will be accurate. The only time you don't do this is when you are sure you were the last person to use it. When in doubt, focus it. Here's a common scenario in an independent opticianry office: A patient walks in with a prescription and wants to buy new eyeglasses. This is a first-time patient, so you'll want to record the power of their old eyeglasses, which you'll obtain by neutralizing their current pair. How do you do this? Normally, you start by taking their eyeglasses and placing them on the lensometer's stage. From there, you'll place the right lens in front of the lens stop approximately in the middle of the lens vertically and horizontally and clamp it in place. Because you don't know the power of the lenses, you'll focus through higher and lower powers searching for a clear target. In essence, you're hunting for the power. If the lenses have cylinder, you'll hunt WHAT'S THE DIFFERENCE BETWEEN LENS NEUTRALIZATION AND VERIFICATION?

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