削薄棱镜
Slab-off prisms.
作者信息
Garber N R, Kirdulis T
出版信息
J Ophthalmic Nurs Technol. 1989 Jul-Aug;8(4):139-42.
PMID:2769768
Abstract
- There are three grinding techniques for slab-off prism effects: front surface slab-off; bicentric grinding; and reverse slab-off. 2. The front surface slab-off and bicentric produce base-up prism in the lower section of the lens. Reverse slab-off produces base-down prism in the inferior portion of the lens. 3. The slab-off prism process is used to correct vertical diplopia in the reading position. Use of slab-off prism in glasses is expensive and should only be considered for stable deviations.
摘要
- 用于负球差棱镜效应的研磨技术有三种：前表面负球差研磨；双心研磨；以及反向负球差研磨。2. 前表面负球差研磨和双心研磨在镜片下部产生底朝上的棱镜。反向负球差研磨在镜片下部产生底朝下的棱镜。3. 负球差棱镜工艺用于矫正阅读位置的垂直复视。眼镜中使用负球差棱镜成本高昂，仅应考虑用于稳定的偏差情况。
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