公开(公告)号：US5258791A

公开(公告)日：1993-11-02

申请号：US557263

申请日：1990-07-24

申请人： Carl M. Penney ,  Robert H. Webb ,  Jerome J. Tiemann ,  Keith P. Thompson

发明人： Carl M. Penney ,  Robert H. Webb ,  Jerome J. Tiemann ,  Keith P. Thompson

IPC分类号： A61B3/103 ,  A61B3/14 ,  A61B3/10

CPC分类号： A61B3/103 ,  A61B3/14

摘要： A spatially resolved map of the eye's refractive characteristics are provided by measuring the eye's refractive characteristics on a point-by-point basis across the anterior surface of the eye. This spatially resolved refraction data may be obtained subjectively by providing a reference pattern and a measurement beam, by establishing a particular position on the cornea as the location to be measured and manipulating the orientation of the measurement beam at that measurement point to bring the measurement beam to a desired position relative to the reference image. When the patient indicates that the measurement beam is in the desired position relative to the reference pattern, the orientation of the beam is recorded as the refractive data for that measurement point and the process proceeds to another measurement point. This provides relatively rapid, physiologically accurate refractive data on a spatially resolved basis. Alternatively, this spatially resolved refraction data may be obtained objectively by independently controlling the position and orientation of a measurement beam and using a feedback null system to determine the refractive characteristics. This enables rapid, automatic non-subjective determination of the refractive characteristics of the eye and thereby provides the ability to provide improved correction of the eye. This spatially resolved refraction information enables spatially resolved correction of vision by spatially resolved shaping of the anterior surface of the eye.

摘要翻译： 通过在眼睛的前表面上逐点测量眼睛的折射特性来提供眼睛折射特性的空间分辨图。 可以通过提供参考图案和测量光束来主观地获得该空间分辨折射数据，通过在角膜上建立特定位置作为要测量的位置并操纵测量光束在该测量点处的取向以使测量光束 到相对于参考图像的期望位置。 当患者指示测量光束相对于参考图案处于期望位置时，光束的取向被记录为该测量点的折射数据，并且该过程进行到另一个测量点。 这在空间分辨的基础上提供相对快速的，生理学上准确的折射数据。 或者，可以通过独立地控制测量光束的位置和取向并使用反馈零系统来确定折射特性，从而客观地获得该空间分辨折射数据。 这使得能够快速，自动地非主观地确定眼睛的折射特性，从而提供改善眼睛矫正的能力。 这种空间分辨的折射信息能够通过眼睛前表面的空间分辨成形来进行空间分辨的视觉校正。

公开(公告)号：US5214455A

公开(公告)日：1993-05-25

申请号：US677902

申请日：1991-04-01

申请人： Carl M. Penney ,  Keith P. Thompson ,  Robert H. Webb

发明人： Carl M. Penney ,  Keith P. Thompson ,  Robert H. Webb

IPC分类号： A61B3/11 ,  A61B3/12

CPC分类号： A61B3/11 ,  A61B3/111 ,  A61B3/1225

摘要： Eye alignment is determined by producing a combined iris/retinal image by use of an imaging system. The relative position of the centroid of the pupil and various structures on the retina is indicative of the eye alignment. The eye alignment may be determined by comparing a combined iris/retinal image at the present time with a stored iris/retinal image at a past time. The imaging system may be a laser scanning ophthalmoscope.

摘要翻译： 通过使用成像系统产生组合的虹膜/视网膜图像来确定眼睛对准。 瞳孔和各种结构的质心在视网膜上的相对位置表示眼睛对准。 可以通过将当前时间的组合的虹膜/视网膜图像与过去时间的存储的虹膜/视网膜图像进行比较来确定眼睛对准。 成像系统可以是激光扫描检眼镜。

公开(公告)号：US4764005A

公开(公告)日：1988-08-16

申请号：US876231

申请日：1986-06-19

申请人： Robert H. Webb ,  George W. Hughes

发明人： Robert H. Webb ,  George W. Hughes

IPC分类号： A61B3/12 ,  A61B3/14 ,  A61B3/10

CPC分类号： A61B3/1025

摘要： An optical instrument which operates with an incident optical beam scanned at high rates and with correspondingly small sized scanning devices, has a double-scanning optical system. The output reflected beam that is detected overfills the first-stage scanning element, yet the instrument attains a relatively high-contrast image. The instrument provides for astigmatism correction, graphic generation in the scanned beam, and the use of infrared wavelength laser beams as well as visible wavelength laser beams. It also provides for generating system timing pulses from a rotating scanning element.

摘要翻译： 以高速扫描的入射光束和相应小尺寸扫描装置工作的光学仪器具有双扫描光学系统。 检测到的输出反射光束超过第一级扫描元件，但是仪器获得相对高对比度的图像。 该仪器提供散光校正，扫描光束中的图形生成，以及使用红外波长激光束以及可见波长激光束。 它还提供从旋转扫描元件产生系统定时脉冲。