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Ophthalmic Products and Frames Flashcards

7 cards from real NOCE practice questions. Tap to flip, then mark Knew It or Still Learning — missed cards come back until you master them.

Read the first 7 Ophthalmic Products and Frames flashcards as text

  1. A rimless mounting uses which component to secure the lens to the bridge and endpiece?

    Answer: A screw through a drilled hole in the lens

    Rimless (drilled) mountings use a screw or post that passes through a hole drilled in the lens to attach it to the bridge and endpiece hardware.

  2. What is the recommended minimum lens thickness at the drill point for a rimless mounting to prevent cracking?

    Answer: 2.0 mm

    A minimum of 2.0 mm of lens material at the drill site is generally recommended to provide sufficient structural integrity and prevent cracking.

  3. A frame is described as having a 'keyhole bridge.' What does this describe?

    Answer: A bridge with a very narrow, elongated opening that contacts the nose on both sides

    A keyhole bridge has a narrow elongated shape, making contact on the sides of the nose, and is typically used on vintage or classic frame styles.

  4. Which frame adjustment increases the distance between the lens back vertex and the cornea?

    Answer: Moving the nose pads forward to push the frame away from the face

    Moving nose pads forward on their arms pushes the frame away from the face, increasing vertex distance between the lens and the cornea.

  5. When fitting a high-plus power lens, which frame characteristic is MOST important to consider?

    Answer: A small eye size to minimize lens thickness and weight

    For high-plus lenses, a smaller eye size minimizes the center thickness and overall lens weight, improving comfort and cosmetics.

  6. What is the purpose of the 'A' measurement in the boxing system?

    Answer: The horizontal width of the lens aperture

    In the boxing system, the 'A' measurement is the horizontal width of the lens aperture (eyewire opening), measured across the widest point of the bounding box.

  7. A patient selects a frame with a very high base curve (e.g., 8 base). Which lens type is BEST suited for this frame?

    Answer: Wrap-designed or atoric lenses corrected for the tilt

    Highly curved wrap frames require specially designed wrap or atoric lenses that compensate for the optical distortions introduced by the frame's tilt and curve.