| 摘要 |
<p>The invention relates to a method and apparatus for uniquely and unambiguously aligning a patient's visual line of sight (LOS) (12) to the optical axis (40) of an ophthalmic instrument such as may be used for laser surgery or diagnostics. By the method of the invention, two alignment targets (32, 32') are imaged at different distances along the optical axis of the ophthalmic instrument. Viewing along the optical axis (40) a patient moves his or her eye (10) until the two imaged targets (32, 32') are viewed in alignment by the patient, the patient's LOS (12) is precisely aligned with the optical axis (40) of the apparatus. By relying on the patient's ability to self-align, this technique ensures that measurements are taken within a reproducible reference frame that is unique to each patient but independent of the type of machine used.</p> |
