NAO VOLUME IV QUESTIONS AND ANSWERS | LATEST UPDATE | 2024/2025 | 100% PASS
5 views 0 purchase
Course
NAO VOLUME IV
Institution
NAO VOLUME IV
NAO VOLUME IV QUESTIONS AND
ANSWERS | LATEST UPDATE |
2024/2025 | 100% PASS
How does a bifocal lens differ from a single-vision lens?
A bifocal lens has two distinct optical powers to correct near and distance vision, while a
single-vision lens has only one prescription.
What does "base c...
NAO VOLUME IV QUESTIONS AND
ANSWERS | LATEST UPDATE |
2024/2025 | 100% PASS
How does a bifocal lens differ from a single-vision lens?
✔✔A bifocal lens has two distinct optical powers to correct near and distance vision, while a
single-vision lens has only one prescription.
What does "base curve" refer to in the context of lens design?
✔✔The base curve is the curvature on the front surface of the lens, affecting both fit and optical
performance.
What are photochromic lenses?
✔✔Photochromic lenses adjust to light levels, darkening in bright sunlight and becoming clear
indoors, offering convenience and UV protection.
How does prism correction work in lenses?
✔✔Prism correction shifts light entering the eye, helping individuals with eye alignment issues
to see a single, unified image.
1
, Why is accurate pupillary distance (PD) measurement important?
✔✔Accurate PD ensures that the lenses align properly with the eyes' centers, which is essential
for optimal visual clarity and comfort.
What are occupational lenses, and when are they used?
✔✔Occupational lenses are specialized for certain tasks, like computer work or hobbies,
providing optimal vision for specific distances.
What is a slab-off prism, and why might it be necessary?
✔✔A slab-off prism corrects vertical imbalance in the lenses, helping individuals with
significant prescription differences between eyes.
What does “prescription balance” mean in eyeglass lenses?
✔✔Prescription balance refers to ensuring that lenses provide coordinated vision between both
eyes, crucial for those with differing prescriptions.
How does an anti-scratch coating benefit lenses?
✔✔An anti-scratch coating protects lenses from minor abrasions, extending the lens’s life and
maintaining optical clarity.
2
The benefits of buying summaries with Stuvia:
Guaranteed quality through customer reviews
Stuvia customers have reviewed more than 700,000 summaries. This how you know that you are buying the best documents.
Quick and easy check-out
You can quickly pay through credit card or Stuvia-credit for the summaries. There is no membership needed.
Focus on what matters
Your fellow students write the study notes themselves, which is why the documents are always reliable and up-to-date. This ensures you quickly get to the core!
Frequently asked questions
What do I get when I buy this document?
You get a PDF, available immediately after your purchase. The purchased document is accessible anytime, anywhere and indefinitely through your profile.
Satisfaction guarantee: how does it work?
Our satisfaction guarantee ensures that you always find a study document that suits you well. You fill out a form, and our customer service team takes care of the rest.
Who am I buying these notes from?
Stuvia is a marketplace, so you are not buying this document from us, but from seller SterlingScores. Stuvia facilitates payment to the seller.
Will I be stuck with a subscription?
No, you only buy these notes for $9.71. You're not tied to anything after your purchase.