发明授权
US5007729A Wide angle ophthalmic lens 失效
广角眼镜

Wide angle ophthalmic lens
摘要:
An ophthalmic lens which has three elements, a contact lens, a center lens, and an entry lens. The lens produces a wide field, aerial image of the fundus of the eye. The lens is particularly useful because it provides high resolution of the peripheral retina, and causes little or no distortion of the laser beam used for peripheral fundus laser treatment.
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