Hood for an ophthalmic device
- 专利权人:
- Kelvin Nguyen
- 发明人:
- Kelvin Nguyen
- 申请号：
- US14859294
- 公开号：
- US09763574B2
- 申请日:
- 2015.09.19
- 申请国别(地区):
- US
- 年份:
- 2017
- 代理人:
- 摘要：
- The present invention describes a rectangular parabolic hood for blocking accommodation and reducing depth of focus to offset the negative affects of extraneous light and visual stimulus during examination of the pupil using ophthalmic instruments.
- 来源网站：
- 中国工程科技知识中心
