Method and apparatus for controlling visual refractive state of the eye
Patent 4190332 Issued on February 26, 1980. Estimated Expiration Date: 
October 14, 1997. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.
October 14, 1997. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.Patent References 3836238 3843240 3883233 InventorsAssigneeApplicationNo. 05/842173 filed on 10/14/1977US Classes:351/211, Including projected target image351/246Methods of useExaminersPrimary: Sacher, Paul A.Attorney, Agent or FirmInternational ClassesA61B 3/103 (20060101)A61B 3/02 (20060101) A61B 3/09 (20060101) AbstractA method and apparatus are disclosed for controlling the refractive state of the eye. The image of a visual target is continuously positioned close to, but offset from, the retinal plane of the eye to be controlled. The offset is in such a direction from the retina that as the eye attempts to focus on the image, the refractive state of the eye will change toward the desired goal. To increase the effectiveness of the method and apparatus, the position of the image is continually varied along the optical axis.Other References
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