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Basic Lens Types

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Eye see trouble - act fast!

If vision's at stake, don't hesitate.


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Welcome to our Basic Lens Types Training! In this session, we'll explore the different types of lenses commonly used in eyewear. Whether you're new to the world of optics or just looking to refresh your knowledge, this training will help you understand the key differences, features, and benefits of each lens type. By the end, you'll have a solid foundation to better assist customers in selecting the perfect lens for their needs. Let's dive in!

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1. What type of refractive error do single vision lenses correct?
Astigmatism A single refractive error Presbyopia None of the above
2. What type of single vision lenses are used to correct myopia (nearsightedness)?
Plus powered lenses Minus powered lenses Bifocal lenses Multifocal lenses
3. How is the curvature, thickness, and weight of single vision lenses influenced?
By the shape of the frame only By the patient's prescription and lens material By the colour of the lenses By the patient's age
4. What is the primary purpose of bifocal lenses?
To correct a single refractive error To correct both distance and near vision To correct astigmatism only To provide a continuous vision range
5. What is a drawback of bifocal lenses?
They can only correct distance vision There is no clear focus in the intermediate range They are too thin and lightweight They can cause dizziness for all users
6. Where on the bifocal lens is the distance vision correction based?
The lower half The upper part The side of the lens The center
7. What visual challenge might people with bifocals face?
A blurry view of near objects only Tilting their chin forward to focus on nearby objects Constant double vision Difficulty seeing in low light
8. What is the main feature of progressive lenses?
A single focal point for distance vision A smooth transition from distance to reading areas A fixed focus for near vision A dividing line between the distance and near vision areas
9. Why are progressive lenses preferred for presbyopia correction?
They are cheaper than bifocals They provide a clear focus at only one distance They allow vision at near, intermediate, and far distances without visible lines They are lighter than other lens types
10. What does the progressive lens offer that bifocals do not?
A single focal point Clear vision only for reading Smooth transition across distances A hard dividing line for near and far vision
11. What variety of option do progressive lenses offer?
Only one standard style A wide variety of types to suit different purposes and applications Only custom-made lenses A limited range for specific conditions
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