Ophthalmic Optics Exam I - Hand Neutralization

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13 Terms

1
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Hand neutralization

determining the power of a lens using trial lenses by observing the prismatic effect.

2
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base, apex

Through a prism, the ray bends towards the _____ where as the image moves towards the _____

(Two answers)

3
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plus

Does a plus or minus lens act like two prisms placed base to base ultimately converging the incident light?

<p>Does a plus or minus lens act like two prisms placed base to base ultimately converging the incident light?</p>
4
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minus

Does a plus or minus lens act like two prisms placed apex to apex ultimately diverging the incident light?

<p>Does a plus or minus lens act like two prisms placed apex to apex ultimately diverging the incident light?</p>
5
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plus, against, minus

By moving a _____ lens downward, the prism will move the light downward but the image upward, showing ______ motion. This motion is then neutralize with a _______ lens.

(three answers)

<p>By moving a _____ lens downward, the prism will move the light downward but the image upward, showing ______ motion. This motion is then neutralize with a _______ lens.</p><p>(three answers)</p>
6
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minus, with, plus

By moving a _____ lens downward, the prism will move the light upward but the image downward, showing ______ motion. This motion is then neutralized with a _____ lens.

(three answers)

<p>By moving a _____ lens downward, the prism will move the light upward but the image downward, showing ______ motion. This motion is then neutralized with a _____ lens.</p><p>(three answers)</p>
7
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plano

A _____ lens will show no motion because it has no prismatic effect.

8
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toric

If the cross shows a scissor movement with rotation, then you know it is a _____ lens.

<p>If the cross shows a scissor movement with rotation, then you know it is a _____ lens.</p>
9
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against break meridian

The meridian of a toric lens which shows a motion opposite to the direction of lens rotation.

<p>The meridian of a toric lens which shows a motion opposite to the direction of lens rotation.</p>
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with break meridian

The meridian of a toric lens which shows a motion in the same direction of lens rotation. This will also represent the minus cylinder axis of the lens.

<p>The meridian of a toric lens which shows a motion in the same direction of lens rotation. This will also represent the minus cylinder axis of the lens.</p>
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vertical

When moving a toric lens up and down, you are neutralizing which meridian?

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horizontal

When moving a toric lens left and right, you are neutralizing which meridian?

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OD: -2.00-2.00x060

OS: -4.00-1.00x030

What is the Rx in minus cylinder form?

<p>What is the Rx in minus cylinder form?</p>