Screening for GP lenses is virtually identical to SCLs. True or False?

• A. True
• B. False
• C. Not specified
• D. Sometimes true

Answer: (A)

The main idea is that when you screen a contact lens fit, you’re evaluating how the lens sits on the eye and how it interacts with the tear film and ocular surfaces, and you use the same core checks whether the lens is rigid or soft. For both gas-permeable lenses and soft lenses, you look at where the lens centers on the cornea, how it moves with a blink, how the edge interacts with the lid and sclera, and how the tear film behaves under the lens. You use observation under a slit lamp, often with fluorescein, to see tear-film distribution, any bearing, and staining patterns, and you assess overall ocular health.

With rigid GP lenses, the emphasis is on achieving proper apical clearance and precise peripheral alignment, ensuring the edges don’t bear on the cornea or inflame the lid margin. For soft lenses, the focus is more on lid interaction, adequate movement, and comfort, since the material can conform more and tolerances are different. Even so, the fundamental screening steps—verify centration, confirm appropriate movement, check edge alignment, assess tear film behavior, and ensure no adverse staining or lid issues—are the same framework applied to both. That’s why the screening process is described as virtually identical across GP lenses and SCLs, with interpretation tailored to the lens type.