Which frame style should you avoid when a patient has a high plus prescription?

• A. Semi-rimless
• B. Full rim
• C. Rimless
• D. Clip-on

Answer: (A)

With a high plus prescription, the lens is thickest in the middle while the edges stay relatively thin. A semi-rimless frame only supports the lens along a partial rim, which means less even support and more potential for flexing in the center. That increased flex can put stress on the mounting area and the lens edge, raising the risk of cracking, chipping, or the lens becoming loose over time. A full rim surrounds the entire lens and provides more uniform support, making it a safer, more stable choice for thick center lenses. Clip-ons don’t address frame support and rimless styles add their own mounting stresses, so the semi-rimless option is the least suitable for a high plus prescription.