Optical Math第 97 / 100 题
What is the combined horizontal prism when the right lens gives 2 prism diopters base out and the left lens gives 1 prism diopter base out?
a.1 prism diopter base out total
b.2 prism diopters base in
c.3 prism diopters base out total
d.0 prism diopters
解析
Horizontal prisms of the same base direction in the two eyes add together. 2 base out + 1 base out = 3 prism diopters base out total split across the two eyes.
免费刷完整 100 道题库 — 无需注册。
同考点相关题目
- A frame has an A measurement of 52 mm, DBL of 18 mm, and the patient's PD is 62 mm. What is the total decentration for both lenses combined?
- With a 34 mm effective diameter and 4 mm per-lens decentration, what is the approximate minimum blank size?
- A patient is refracted at a 12 mm vertex with -10.00 D, but the frame sits at 16 mm. Which way does the effective power change, requiring compensation?
- Compute the spherical equivalent of +3.00 -2.00 x 090.
- How much vertical prism imbalance exists if the reading point is 8 mm below the OC in a +2.50 D right lens and a +1.00 D left lens (Prentice's rule)?
- A lens has a front curve of +8.00 D and needs +2.00 D total power. What back curve is required (thin-lens approximation)?