Term
| The goal of proper tilt is to maintain a 90 degree angle between the visual axis and the OC |
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Definition
True
The goal of proper tilt is to maintain a 90 degree angle between the visual axis and the OC |
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Term
| Under what circumstances would a frame with no panto be acceptable |
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Definition
| If the axis is at the midpoint and the eyes are at the OC |
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Term
| After taking a vertical OC measurement from the bottom of the frame to the center of the pupil, you realize the frame has 8 degrees of panto. How much lower would you set the OC |
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Definition
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Term
| Why are polarized lenses not a good idea for skiers |
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Definition
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Term
| Why is UV protection so important for an aphake (someone without a crystalline lens) |
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Definition
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|
Term
|
Definition
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Term
| Why would we prefer a blue-balanced lens rather than a lens that blocks out ALL the blue light |
|
Definition
Some blue light is bad
Some blue light is good
Balanced lens will allow good in but not the bad |
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Term
| Which lens theory are we attempting to preserve through accurately applying pantoscopic tilt to a patients frame |
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Definition
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Term
| Patient complaining about how the image appears to be bending towards the edge of the lens. What aberration is he noticing |
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Definition
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Term
| What is the name of the process used for applying mirror coatings |
|
Definition
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|
Term
| Why is index 1.74 only manufactured with an anti reflective coating |
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Definition
| Large % of light is reflected off the surface of the lens |
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Term
| When high plus spectacle lenses are tilted too much pantoscopically, what can be expected to occur |
|
Definition
| An error of refractive power is induced |
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|
Term
| As the pantoscopic angle is increased |
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Definition
| The optical centers should be lowered |
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Term
| The new transition generation 8 lens will change behind the windshield of a car |
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Definition
False
The new transition generation 8 lens will change behind the windshield of a car |
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Term
| If you tilt a -7.00 lens in the lensometer and read the power, what lens aberration would you see |
|
Definition
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|
Term
| A grey sunglass lens outperforms a brown sunglass lens when considering harmful blue light |
|
Definition
False
A grey sunglass lens outperforms a brown sunglass lens when considering harmful blue light |
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|
Term
| What color tint might you recommend for someone's office pair of glasses |
|
Definition
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|
Term
| Blue light blocking lenses with a yellow tint are significantly more effective than coatings such as prevencia |
|
Definition
True
Blue light blocking lenses with a yellow tint are significantly more effective than coatings such as prevencia |
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|
Term
| What color sunglass would you recommend to someone who is color deficient |
|
Definition
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|
Term
| Why did CPF lenses outperform the PLS |
|
Definition
| Photochromic allows for consistent light levels entering the eye |
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|
Term
| The break up of white light into its individual colors is known as |
|
Definition
Dispersion
Chromatic Aberration |
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|
Term
| When lens aberration is of utmost and primary importance to a lens designer and usually factored first |
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Definition
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|
Term
| Paraxial and axial rays focusing at different lengths |
|
Definition
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|
Term
| Complaints of concentric circles appearing towards the edge of her lens. What can you do to help make them less noticeable |
|
Definition
| Polish edge of her lenses |
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Term
| When the curve of the lens does not match up perfectly with the curve of the retina, which aberration occues |
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Definition
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|
Term
| Identify a lens aberration that is not usually a concern for opticians due to the size of a patients pupil |
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Definition
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|
Term
| Out yachting on the high seas. Wants a mirror applied to his sunglasses. What color while out on the water |
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Definition
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|
Term
| When do we check front vertex power in the lensometer |
|
Definition
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Term
| What would be the most practical way for the optician to decide which CPF lens to give their patient |
|
Definition
Trial + error
Send home with samples |
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|
Term
| What are two things you can do that will help mitigate almost all aberrations |
|
Definition
Modern lens designs/Aspehric
AR
Proper sized frames
Mono PD |
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|
Term
| What is the technical term for having zero panto |
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Definition
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