Prescription Analysis第 45 / 100 题
With-the-rule astigmatism typically has the cylinder axis oriented near what?
a.Axis 45
b.Axis 135
c.Axis 90 in plus cylinder
d.Axis 180 in minus cylinder
解析
With-the-rule astigmatism has the steeper corneal meridian vertical, corrected with minus cylinder axis at or near 180 degrees. This is the most common form of astigmatism.
免费刷完整 100 道题库 — 无需注册。
同考点相关题目
- A -8.00 D lens is moved closer to the eye. Its effective minus power does what?
- Neutralizing a lens with a lensmeter finds what point?
- Hand neutralization of an unknown lens uses what technique?
- An Rx reads OD +1.50 -0.50 x 090, OS +1.50 -0.50 x 090, Add +2.25. What is the near power in each eye?
- Prism prescribed as '2 base out' in each eye is used to help with what?
- A patient needs 3 prism diopters base down in the right lens. If the lens is +2.00 D, how much decentration achieves this (Prentice's rule)?