DispensingCâu 63 / 100
When fitting a progressive lens, accurate fitting-cross placement is critical because what?
a.Misplacement forces the wearer to adopt awkward head postures
b.It changes the tint
c.It changes the frame color
d.It changes the base curve only
Giải thích
The fitting cross must align with the pupil in primary gaze; if it is off, the corridor and reading zone are misplaced, forcing the patient to tilt or turn the head to find clear vision.
Luyện miễn phí toàn bộ 100 câu hỏi — không cần đăng ký.
Câu hỏi liên quan cùng chủ đề
- MPD (monocular PD) is preferred over binocular PD because it accounts for what?
- High-minus lenses can be made cosmetically thinner at the edge by doing what?
- For a high-plus (aphakic-type) lens, choosing a smaller frame does what?
- A patient complains of temple pain behind the ears with new glasses. The best adjustment is to do what?
- Wrap angle (face-form) that is too aggressive on a high-powered Rx can cause what?
- Which patient complaint most suggests the PD was measured or set too wide?
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