NOCE Ophthalmic Products Questions and Answers

Question 1

A patient with sensitive eyes who frequently experiences irritation from their soft contact lenses would likely benefit most from switching to which type of cleaning and disinfecting system?

Accepted Answer

A hydrogen peroxide-based system.

Answer

Hydrogen peroxide-based systems provide strong disinfection and are typically preservative-free, making them an excellent choice for individuals with sensitivities or allergies to the preservatives found in many multi-purpose solutions. Saline solution only rinses lenses and has no disinfecting properties. RGP solutions are formulated for hard lenses, not soft ones.

Question 2

A patient who is a welder requires new safety glasses. Which frame material would be the most suitable choice due to its high durability, resistance to corrosion, and ability to withstand high temperatures?

Accepted Answer

Beryllium

Answer

Beryllium is a very strong, lightweight, and corrosion-resistant metal that can also withstand high temperatures, making it an excellent choice for demanding environments like welding. Zyl and Nylon are plastics that would not hold up well to the heat and potential sparks of welding. Monel, while a common metal for frames, is not as resistant to corrosion or high heat as beryllium.

Question 3

A presbyopic patient with significant anisometropia complains of double vision and eye strain specifically when reading through their new bifocals. Which of the following specialized lens modifications is designed to correct this issue?

Accepted Answer

Slab-off (bicentric grinding)

Answer

Slab-off, also known as bicentric grinding, is a technique used to add base-up prism to the reading portion of one lens to correct for vertical imbalance at near. This imbalance is a common problem in anisometropic patients wearing multifocals, leading to symptoms like diplopia and asthenopia when reading.

Question 4

Which of the following is a primary advantage of a digitally surfaced (free-form) progressive lens compared to a traditional, conventionally molded progressive lens?

Accepted Answer

Wider fields of clear vision and reduced peripheral distortion.

Answer

Digital, or free-form, manufacturing allows for the lens surfaces to be customized point-by-point based on the patient's specific prescription, frame fit, and position of wear. This results in wider, clearer visual zones (distance, intermediate, and near) and significantly reduced peripheral distortion or 'swim' effect compared to traditional one-size-fits-all molded designs.

Question 5

A patient with low vision due to macular degeneration needs a device to help them read their mail and write checks. Which of the following aids would be most effective and practical for these specific tasks?

Accepted Answer

A desktop electronic video magnifier (CCTV)

Answer

A desktop electronic video magnifier (CCTV) is ideal for tasks like reading mail and writing checks because it provides significant, adjustable magnification and contrast enhancement. Crucially, it offers a large working distance between the camera and the task, allowing the user to comfortably place items underneath and write, which is difficult with spectacle-mounted or handheld magnifiers. A monocular telescope is for distance viewing, and large-print cards are not applicable to the tasks described.

NOCE - National Opticianry Competency Examination Practice Test

NOCE - National Opticianry Competency Examination Practice Test

NOCE Ophthalmic Products Questions and Answers